{"id":12342,"date":"2026-02-02T17:06:50","date_gmt":"2026-02-02T17:06:50","guid":{"rendered":"https:\/\/withcode.tech\/media\/?p=12342"},"modified":"2026-03-19T15:15:05","modified_gmt":"2026-03-19T15:15:05","slug":"image_format_avif","status":"publish","type":"post","link":"https:\/\/withcode.tech\/media\/image_format_avif\/","title":{"rendered":"\u3010\u4fdd\u5b58\u7248\u3011\u6b21\u4e16\u4ee3\u753b\u50cf\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8AVIF\u3068\u306f\uff1f\u81ea\u52d5\u5909\u63db\u306e\u65b9\u6cd5\u304b\u3089\u30e1\u30ea\u30c3\u30c8\u307e\u3067\u5fb9\u5e95\u89e3\u8aac"},"content":{"rendered":"<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-14.40.37.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u751f\u5f92<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u6700\u8fd1\u3001Web\u30b5\u30a4\u30c8\u306e\u8868\u793a\u901f\u5ea6\u3092\u6539\u5584\u3057\u305f\u304f\u3066\u8abf\u3079\u3066\u3044\u305f\u3089\u300cAVIF\u300d\u3063\u3066\u3044\u3046\u753b\u50cf\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u898b\u3064\u3051\u305f\u3093\u3067\u3059\u3051\u3069\u3001\u3053\u308c\u3063\u3066\u4f55\u3067\u3059\u304b\uff1f<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.11.23.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u3088\u30fc\u304f\u805e\u304f\u3093\u3060\u305e\uff01AVIF\u306f\u6b21\u4e16\u4ee3\u306e\u753b\u50cf\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u3001JPEG\u3084PNG\u3088\u308a\u3082\u306f\u308b\u304b\u306b\u9ad8\u52b9\u7387\u306a\u3093\u3058\u3083\u3002\u4eca\u65e5\u306fAVIF\u306e\u7279\u5fb4\u304b\u3089\u81ea\u52d5\u5909\u63db\u306e\u65b9\u6cd5\u307e\u3067\u3001\u8a73\u3057\u304f\u89e3\u8aac\u3059\u308b\u305e\u3044\uff01<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-14.48.08.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u751f\u5f92<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u3059\u3054\u3044\u4fbf\u5229\u3067\u3059\u306d\uff01\u305c\u3072\u6559\u3048\u3066\u304f\u3060\u3055\u3044\uff01<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<p>Web\u30b5\u30a4\u30c8\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6539\u5584\u306b\u304a\u3044\u3066\u3001\u753b\u50cf\u306e\u6700\u9069\u5316\u306f\u975e\u5e38\u306b\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002\u7279\u306b\u8fd1\u5e74\u3001\u30e2\u30d0\u30a4\u30eb\u30c7\u30d0\u30a4\u30b9\u304b\u3089\u306e\u30a2\u30af\u30bb\u30b9\u304c\u5897\u52a0\u3059\u308b\u4e2d\u3001\u30da\u30fc\u30b8\u306e\u8aad\u307f\u8fbc\u307f\u901f\u5ea6\u306f\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u3084SEO\u306b\u76f4\u63a5\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001\u6b21\u4e16\u4ee3\u753b\u50cf\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3068\u3057\u3066\u6ce8\u76ee\u3055\u308c\u3066\u3044\u308b<strong><span class=\"swl-marker mark_yellow\">AVIF\uff08AV1 Image File Format\uff09<\/span><\/strong>\u306b\u3064\u3044\u3066\u3001\u57fa\u672c\u7684\u306a\u7279\u5fb4\u304b\u3089\u5b9f\u8df5\u7684\u306a\u81ea\u52d5\u5909\u63db\u306e\u65b9\u6cd5\u307e\u3067\u3001\u5b9f\u88c5\u4f8b\u3092\u4ea4\u3048\u306a\u304c\u3089\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002\u65e2\u5b58\u306eJPEG\u3001PNG\u3001WebP\u3068\u306e\u6bd4\u8f03\u3084\u3001\u5177\u4f53\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6539\u5584\u306e\u5b9f\u30c7\u30fc\u30bf\u3082\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_announce\">\u300c\u5b66\u7fd2\u2192\u5c31\u8077\u300d\u306b\u3064\u306a\u3052\u305f\u53d7\u8b1b\u751f\u306e\u30ea\u30a2\u30eb\u306a\u4f53\u9a13\u8ac7\u3082\u516c\u958b\u4e2d\uff01<br>\u50cd\u304d\u65b9\u3092\u5909\u3048\u305f\u3044\u65b9\u306b\u3082\u97ff\u304f\u30b9\u30c8\u30fc\u30ea\u30fc\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_info\"><strong>\u5409\u6c60\u3055\u3093<\/strong><br>Web\u5236\u4f5c\u3092\u4f53\u7cfb\u7684\u306b\u5b66\u3073\u305f\u3044\u3068\u8003\u3048\u3001WithCode\u306b\u5165\u4f1a\u3055\u308c\u307e\u3057\u305f\u3002\u5352\u696d\u5f8c\u306f\u3001WithCode\u7d4c\u7531\u3067\u5b9f\u6848\u4ef6\u3092\u7d4c\u9a13\u3057\u305f\u307b\u304b\u3001\u3054\u81ea\u8eab\u3067\u3082\u6848\u4ef6\u3092\u7372\u5f97\u3002\u4eca\u5f8c\u306fWeb\u7cfb\u306e\u696d\u52d9\u306b\u643a\u308f\u308a\u305f\u3044\u3068\u3044\u3046\u601d\u3044\u304b\u3089\u8ee2\u8077\u6d3b\u52d5\u3092\u884c\u3044\u3001\u53d7\u8a17\u958b\u767a\u306e\u4f1a\u793e\u3078\u306e\u8ee2\u8077\u3092\u6210\u529f\u3055\u305b\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u8a73\u3057\u304f\u306f<a href=\"https:\/\/withcode.tech\/media\/interview_9\/\" title=\"\">\u3053\u3061\u3089\u306e\u8a18\u4e8b<\/a>\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-withcode-media wp-block-embed-withcode-media\"><div class=\"wp-block-embed__wrapper\">\nhttps:\/\/withcode.tech\/media\/interview_9\/\n<\/div><\/figure>\n\n\n\n<p class=\"is-style-balloon_box2\"><strong>\u5409\u6c60\u3055\u3093\u306e\u4e3b\u306a\u5236\u4f5c\u5b9f\u7e3e\u306f\u3053\u3061\u3089<\/strong><\/p>\n\n\n<div class=\"swell-block-postLink\">\t\t\t<div class=\"p-blogCard -external\" data-type=\"type3\" data-onclick=\"clickLink\">\n\t\t\t\t<div class=\"p-blogCard__inner\">\n\t\t\t\t\t<span class=\"p-blogCard__caption\">\u682a\u5f0f\u4f1a\u793eYOURDELT \u69d8<\/span>\n\t\t\t\t\t<div class=\"p-blogCard__thumb c-postThumb\"><figure class=\"c-postThumb__figure\"><img decoding=\"async\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/08\/\u5409\u6c60\u3055\u3093.webp\" alt=\"\" class=\"c-postThumb__img u-obf-cover\" width=\"320\" height=\"180\"><\/figure><\/div>\t\t\t\t\t<div class=\"p-blogCard__body\">\n\t\t\t\t\t\t<a class=\"p-blogCard__title\" href=\"https:\/\/withcode.tech\/works\/yourdelt_hp\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u682a\u5f0f\u4f1a\u793eYOURDELT \u69d8<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">AVIF\u3068\u306f\uff1f\u6b21\u4e16\u4ee3\u753b\u50cf\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u57fa\u790e\u77e5\u8b58<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignleft size-full\"><img decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006514.jpg\" alt=\"\" class=\"wp-image-12996\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006514.jpg 1536w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006514-768x512.jpg 768w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<\/div>\n\n\n<p>AVIF\uff08AV1 Image File Format\uff09\u306f\u3001\u52d5\u753b\u30b3\u30fc\u30c7\u30c3\u30afAV1\u3092\u30d9\u30fc\u30b9\u3068\u3057\u305f\u753b\u50cf\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u3059\u3002Alliance for Open Media\u306b\u3088\u3063\u3066\u958b\u767a\u3055\u308c\u30012019\u5e74\u306b\u6b63\u5f0f\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">AVIF\u306e\u7279\u5fb4<\/h3>\n\n\n\n<p>AVIF\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7279\u5fb4\u3092\u6301\u3064\u3001\u975e\u5e38\u306b\u5148\u9032\u7684\u306a\u753b\u50cf\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u9ad8\u3044\u5727\u7e2e\u52b9\u7387<\/strong>: JPEG\u3068\u6bd4\u8f03\u3057\u3066\u7d0450%\u3001WebP\u3068\u6bd4\u8f03\u3057\u3066\u3082\u7d0420-30%\u306e\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u524a\u6e1b\u3092\u5b9f\u73fe<\/li>\n\n\n\n<li><strong>\u9ad8\u54c1\u8cea\u306a\u753b\u50cf\u4fdd\u6301<\/strong>: \u9ad8\u5727\u7e2e\u7387\u3067\u3042\u308a\u306a\u304c\u3089\u3001\u8996\u899a\u7684\u306a\u753b\u8cea\u52a3\u5316\u3092\u6700\u5c0f\u9650\u306b\u6291\u5236<\/li>\n\n\n\n<li><strong>HDR\u30b5\u30dd\u30fc\u30c8<\/strong>: High Dynamic Range\uff08\u30cf\u30a4\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u30ec\u30f3\u30b8\uff09\u753b\u50cf\u306b\u5bfe\u5fdc<\/li>\n\n\n\n<li><strong>\u5e83\u8272\u57df\u5bfe\u5fdc<\/strong>: WCG\uff08Wide Color Gamut\uff09\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3001\u3088\u308a\u8c4a\u304b\u306a\u8272\u8868\u73fe\u304c\u53ef\u80fd<\/li>\n\n\n\n<li><strong>\u900f\u904e\u753b\u50cf\u5bfe\u5fdc<\/strong>: \u30a2\u30eb\u30d5\u30a1\u30c1\u30e3\u30f3\u30cd\u30eb\uff08\u900f\u904e\u60c5\u5831\uff09\u3092\u30b5\u30dd\u30fc\u30c8<\/li>\n\n\n\n<li><strong>\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u5bfe\u5fdc<\/strong>: \u52d5\u753b\u7684\u306a\u9023\u7d9a\u753b\u50cf\u306e\u8868\u793a\u304c\u53ef\u80fd<\/li>\n\n\n\n<li><strong>\u30ed\u30a4\u30e4\u30ea\u30c6\u30a3\u30d5\u30ea\u30fc<\/strong>: \u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u3067\u7279\u8a31\u4f7f\u7528\u6599\u304c\u4e0d\u8981<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">AVIF\u304c\u751f\u307e\u308c\u305f\u80cc\u666f<\/h3>\n\n\n\n<p>\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306e\u5927\u90e8\u5206\u3092\u753b\u50cf\u304c\u5360\u3081\u308b\u4e2d\u3001\u3088\u308a\u52b9\u7387\u7684\u306a\u753b\u50cf\u914d\u4fe1\u306e\u5fc5\u8981\u6027\u304c\u9ad8\u307e\u3063\u3066\u3044\u307e\u3057\u305f\u3002\u5f93\u6765\u306eJPEG\u306f1992\u5e74\u306b\u7b56\u5b9a\u3055\u308c\u305f\u53e4\u3044\u898f\u683c\u3067\u3042\u308a\u3001\u73fe\u4ee3\u306eWeb\u74b0\u5883\u306b\u306f\u6700\u9069\u5316\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>Google\u306fWebP\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u958b\u767a\u3057\u307e\u3057\u305f\u304c\u3001\u3055\u3089\u306a\u308b\u5727\u7e2e\u52b9\u7387\u306e\u5411\u4e0a\u3092\u76ee\u6307\u3057\u3001\u52d5\u753b\u30b3\u30fc\u30c7\u30c3\u30afAV1\u306e\u6280\u8853\u3092\u5fdc\u7528\u3057\u305fAVIF\u304c\u8a95\u751f\u3057\u307e\u3057\u305f\u3002AV1\u81ea\u4f53\u304c\u975e\u5e38\u306b\u9ad8\u52b9\u7387\u306a\u52d5\u753b\u5727\u7e2e\u6280\u8853\u3067\u3042\u308b\u305f\u3081\u3001\u305d\u306e\u9759\u6b62\u753b\u7248\u3067\u3042\u308bAVIF\u3082\u512a\u308c\u305f\u6027\u80fd\u3092\u767a\u63ee\u3057\u307e\u3059\u3002<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.06.05.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u751f\u5f92<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u52d5\u753b\u306e\u6280\u8853\u3092\u753b\u50cf\u306b\u5fdc\u7528\u3057\u305f\u3093\u3067\u3059\u306d\uff01\u3060\u304b\u3089\u5727\u7e2e\u52b9\u7387\u304c\u9ad8\u3044\u3093\u3060\uff01<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.12.07.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u305d\u306e\u901a\u308a\u3058\u3083\uff01\u52d5\u753b\u306f1\u79d2\u9593\u306b\u4f55\u5341\u679a\u3082\u306e\u753b\u50cf\u3092\u52b9\u7387\u7684\u306b\u5727\u7e2e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u304b\u3089\u3001\u305d\u306e\u6280\u8853\u3092\u9759\u6b62\u753b\u306b\u4f7f\u3048\u3070\u5f53\u7136\u9ad8\u52b9\u7387\u306b\u306a\u308b\u3093\u3058\u3083\u305e\uff01<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">AVIF\u306e\u30e1\u30ea\u30c3\u30c8\uff1a\u306a\u305c\u4eca\u3001AVIF\u304c\u6ce8\u76ee\u3055\u308c\u3066\u3044\u308b\u306e\u304b<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignleft size-full\"><img decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006515.jpg\" alt=\"\" class=\"wp-image-12998\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006515.jpg 1536w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006515-768x512.jpg 768w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.00.55.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u751f\u5f92<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u3069\u3046\u3057\u3066AVIF\u304c\u6ce8\u76ee\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3059\u304b\uff1f<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.09.27.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>Web\u30b5\u30a4\u30c8\u904b\u55b6\u8005\u306b\u3068\u3063\u3066\u975e\u5e38\u306b\u9b45\u529b\u7684\u306a\u30e1\u30ea\u30c3\u30c8\u3092\u591a\u6570\u6301\u3063\u3066\u3044\u308b\u305f\u3081\u3058\u3083\uff01\u4eca\u304b\u3089\u8a73\u3057\u304f\u89e3\u8aac\u3059\u308b\u305e\uff01<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h3 class=\"wp-block-heading\">1. \u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u306e\u5927\u5e45\u524a\u6e1b\u306b\u3088\u308b\u30da\u30fc\u30b8\u901f\u5ea6\u5411\u4e0a<\/h3>\n\n\n\n<p>AVIF\u306e\u6700\u5927\u306e\u30e1\u30ea\u30c3\u30c8\u306f\u3001<strong><span class=\"swl-marker mark_yellow\">\u9a5a\u7570\u7684\u306a\u5727\u7e2e\u52b9\u7387\u306b\u3088\u308b\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u306e\u524a\u6e1b<\/span><\/strong>\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u5b9f\u969b\u306e\u6bd4\u8f03\u30c7\u30fc\u30bf\u3067\u306f\u3001\u540c\u3058\u753b\u8cea\u3092\u4fdd\u3061\u306a\u304c\u3089\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u524a\u6e1b\u304c\u5b9f\u73fe\u3055\u308c\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>JPEG\u6bd4\uff1a\u7d0440-50%\u306e\u30b5\u30a4\u30ba\u524a\u6e1b<\/li>\n\n\n\n<li>PNG\u6bd4\uff1a\u7d0460-70%\u306e\u30b5\u30a4\u30ba\u524a\u6e1b<\/li>\n\n\n\n<li>WebP\u6bd4\uff1a\u7d0420-30%\u306e\u30b5\u30a4\u30ba\u524a\u6e1b<\/li>\n<\/ul>\n\n\n\n<p>\u5177\u4f53\u7684\u306a\u4f8b\u3068\u3057\u3066\u30011MB\u306eJPEG\u753b\u50cf\u3092AVIF\u306b\u5909\u63db\u3059\u308b\u3068\u3001\u7d04500-600KB\u7a0b\u5ea6\u306b\u306a\u308a\u307e\u3059\u3002100\u679a\u306e\u753b\u50cf\u3092\u63b2\u8f09\u3059\u308bWeb\u30b5\u30a4\u30c8\u3067\u3042\u308c\u3070\u3001\u5408\u8a08\u306740-50MB\u306e\u8ee2\u9001\u91cf\u524a\u6e1b\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u30da\u30fc\u30b8\u306e\u8aad\u307f\u8fbc\u307f\u901f\u5ea6\u306f\u3001Google\u306eCore Web Vitals\u306b\u304a\u3044\u3066\u3082\u91cd\u8981\u306a\u6307\u6a19\u3068\u3055\u308c\u3066\u304a\u308a\u3001SEO\u306b\u3082\u76f4\u63a5\u5f71\u97ff\u3057\u307e\u3059\u3002AVIF\u306e\u63a1\u7528\u306b\u3088\u308a\u3001LCP\uff08Largest Contentful Paint\uff09\u3092\u5927\u5e45\u306b\u6539\u5584\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u30e2\u30d0\u30a4\u30eb\u74b0\u5883\u3067\u306e\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u5411\u4e0a<\/h3>\n\n\n\n<p>\u30e2\u30d0\u30a4\u30eb\u30c7\u30d0\u30a4\u30b9\u304b\u3089\u306e\u30a2\u30af\u30bb\u30b9\u304c\u5168\u4f53\u306e60%\u4ee5\u4e0a\u3092\u5360\u3081\u308b\u73fe\u4ee3\u306eWeb\u74b0\u5883\u306b\u304a\u3044\u3066\u3001\u30c7\u30fc\u30bf\u8ee2\u9001\u91cf\u306e\u524a\u6e1b\u306f\u6975\u3081\u3066\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p>AVIF\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u901a\u4fe1\u30b3\u30b9\u30c8\u306e\u524a\u6e1b<\/strong>: \u30e6\u30fc\u30b6\u30fc\u306e\u30e2\u30d0\u30a4\u30eb\u30c7\u30fc\u30bf\u4f7f\u7528\u91cf\u3092\u5927\u5e45\u306b\u524a\u6e1b<\/li>\n\n\n\n<li><strong>\u8868\u793a\u901f\u5ea6\u306e\u5411\u4e0a<\/strong>: \u7279\u306b3G\/4G\u56de\u7dda\u3067\u306e\u8aad\u307f\u8fbc\u307f\u304c\u9ad8\u901f\u5316<\/li>\n\n\n\n<li><strong>\u76f4\u5e30\u7387\u306e\u4f4e\u6e1b<\/strong>: \u30da\u30fc\u30b8\u8aad\u307f\u8fbc\u307f\u304c3\u79d2\u4ee5\u5185\u306b\u5b8c\u4e86\u3059\u308b\u78ba\u7387\u304c\u5411\u4e0a<\/li>\n<\/ul>\n\n\n\n<p>Google\u306e\u8abf\u67fb\u306b\u3088\u308c\u3070\u3001\u30da\u30fc\u30b8\u306e\u8aad\u307f\u8fbc\u307f\u6642\u9593\u304c1\u79d2\u304b\u30893\u79d2\u306b\u5897\u52a0\u3059\u308b\u3068\u3001\u76f4\u5e30\u7387\u304c32%\u5897\u52a0\u3059\u308b\u3068\u5831\u544a\u3055\u308c\u3066\u3044\u307e\u3059\u3002AVIF\u306b\u3088\u308b\u9ad8\u901f\u5316\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u306e\u5411\u4e0a\u306b\u76f4\u7d50\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u9ad8\u753b\u8cea\u3092\u7dad\u6301\u3057\u305f\u307e\u307e\u5727\u7e2e\u53ef\u80fd<\/h3>\n\n\n\n<p>\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3092\u524a\u6e1b\u3059\u308b\u969b\u3001\u901a\u5e38\u306f\u753b\u8cea\u306e\u52a3\u5316\u304c\u907f\u3051\u3089\u308c\u307e\u305b\u3093\u3002\u3057\u304b\u3057AVIF\u306f\u3001<strong>\u77e5\u899a\u7684\u306a\u753b\u8cea\u3092\u307b\u307c\u7dad\u6301\u3057\u305f\u307e\u307e\u9ad8\u5727\u7e2e\u3092\u5b9f\u73fe<\/strong>\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u7279\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u753b\u50cf\u3067\u52b9\u679c\u3092\u767a\u63ee\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5199\u771f\u753b\u50cf<\/strong>: \u30b0\u30e9\u30c7\u30fc\u30b7\u30e7\u30f3\u3084\u8907\u96d1\u306a\u30c6\u30af\u30b9\u30c1\u30e3\u3092\u542b\u3080\u753b\u50cf<\/li>\n\n\n\n<li><strong>\u30a4\u30e9\u30b9\u30c8\u30fb\u30b0\u30e9\u30d5\u30a3\u30c3\u30af<\/strong>: \u660e\u78ba\u306a\u30a8\u30c3\u30b8\u3068\u8272\u306e\u5883\u754c\u3092\u6301\u3064\u753b\u50cf<\/li>\n\n\n\n<li><strong>\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8<\/strong>: \u30c6\u30ad\u30b9\u30c8\u3084UI\u30a8\u30ec\u30e1\u30f3\u30c8\u3092\u542b\u3080\u753b\u50cf<\/li>\n<\/ul>\n\n\n\n<p>JPEG\u3067\u306f\u9ad8\u5727\u7e2e\u6642\u306b\u767a\u751f\u3059\u308b\u300c\u30d6\u30ed\u30c3\u30af\u30ce\u30a4\u30ba\u300d\u3084\u300c\u30e2\u30b9\u30ad\u30fc\u30c8\u30ce\u30a4\u30ba\u300d\u3068\u547c\u3070\u308c\u308b\u753b\u8cea\u52a3\u5316\u304c\u3001AVIF\u3067\u306f\u5927\u5e45\u306b\u6291\u5236\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. \u900f\u904e\u753b\u50cf\u3068\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306e\u30b5\u30dd\u30fc\u30c8<\/h3>\n\n\n\n<p>AVIF\u306f\u30a2\u30eb\u30d5\u30a1\u30c1\u30e3\u30f3\u30cd\u30eb\uff08\u900f\u904e\u60c5\u5831\uff09\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\u305f\u3081\u3001PNG\u306e\u4ee3\u66ff\u3068\u3057\u3066\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7528\u9014\u3067\u6709\u52b9\u3067\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30ed\u30b4\u753b\u50cf<\/strong>: \u80cc\u666f\u900f\u904e\u306e\u30ed\u30b4\u3092PNG\u3088\u308a\u3082\u5c0f\u3055\u3044\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3067\u914d\u4fe1<\/li>\n\n\n\n<li><strong>\u30a2\u30a4\u30b3\u30f3<\/strong>: UI\u30a2\u30a4\u30b3\u30f3\u3092\u9ad8\u54c1\u8cea\u304b\u3064\u8efd\u91cf\u306b\u8868\u793a<\/li>\n\n\n\n<li><strong>\u30a4\u30e9\u30b9\u30c8\u7d20\u6750<\/strong>: \u8907\u96d1\u306a\u900f\u904e\u51e6\u7406\u3092\u542b\u3080\u30a4\u30e9\u30b9\u30c8\u306e\u914d\u4fe1<\/li>\n<\/ul>\n\n\n\n<p>\u307e\u305f\u3001AVIF\u306f\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u753b\u50cf\u3082\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u304a\u308a\u3001GIF\u3084Animated WebP\u306e\u4ee3\u66ff\u3068\u3057\u3066\u3082\u6a5f\u80fd\u3057\u307e\u3059\u3002\u30eb\u30fc\u30d7\u3059\u308b\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u3088\u308a\u5c0f\u3055\u3044\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3067\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. HDR\u3068\u5e83\u8272\u57df\u5bfe\u5fdc\u306b\u3088\u308b\u8868\u73fe\u529b\u306e\u5411\u4e0a<\/h3>\n\n\n\n<p>AVIF\u306fHDR\uff08High Dynamic Range\uff09\u3068\u5e83\u8272\u57df\uff08WCG: Wide Color Gamut\uff09\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u304a\u308a\u3001\u3088\u308a\u8c4a\u304b\u306a\u8272\u8868\u73fe\u3068\u660e\u6697\u306e\u8868\u73fe\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u306b\u3088\u308a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5546\u54c1\u5199\u771f<\/strong>: EC\u30b5\u30a4\u30c8\u3067\u5546\u54c1\u306e\u8272\u5473\u3084\u8cea\u611f\u3092\u3088\u308a\u6b63\u78ba\u306b\u8868\u73fe<\/li>\n\n\n\n<li><strong>\u30dd\u30fc\u30c8\u30d5\u30a9\u30ea\u30aa\u30b5\u30a4\u30c8<\/strong>: \u5199\u771f\u5bb6\u3084\u30c7\u30b6\u30a4\u30ca\u30fc\u306e\u4f5c\u54c1\u3092\u9ad8\u54c1\u8cea\u3067\u8868\u793a<\/li>\n\n\n\n<li><strong>\u7f8e\u8853\u9928\u30fb\u30ae\u30e3\u30e9\u30ea\u30fc\u30b5\u30a4\u30c8<\/strong>: \u82b8\u8853\u4f5c\u54c1\u306e\u8272\u5f69\u3092\u5fe0\u5b9f\u306b\u518d\u73fe<\/li>\n<\/ul>\n\n\n\n<p>\u6700\u65b0\u306e\u30c7\u30a3\u30b9\u30d7\u30ec\u30a4\u6280\u8853\u3092\u6d3b\u7528\u3057\u3001\u30e6\u30fc\u30b6\u30fc\u306b\u6700\u9ad8\u306e\u8996\u899a\u4f53\u9a13\u3092\u63d0\u4f9b\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">JPEG\u30fbPNG\u30fbWebP\u30fbAVIF\u3068\u306e\u5fb9\u5e95\u6bd4\u8f03<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignleft size-full\"><img decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006517.jpg\" alt=\"\" class=\"wp-image-12999\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006517.jpg 1536w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006517-768x512.jpg 768w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<\/div>\n\n\n<p>AVIF\u306e\u512a\u4f4d\u6027\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u3001\u65e2\u5b58\u306e\u4e3b\u8981\u753b\u50cf\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3068\u306e\u8a73\u7d30\u306a\u6bd4\u8f03\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5404\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u7279\u5fb4\u6bd4\u8f03\u8868<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/th><th>\u5727\u7e2e\u52b9\u7387<\/th><th>\u753b\u8cea<\/th><th>\u900f\u904e<\/th><th>\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3<\/th><th>\u30d6\u30e9\u30a6\u30b6\u5bfe\u5fdc<\/th><\/tr><\/thead><tbody><tr><td><strong>JPEG<\/strong><\/td><td>\u2605\u2605\u2606\u2606\u2606<\/td><td>\u2605\u2605\u2605\u2606\u2606<\/td><td>\u00d7<\/td><td>\u00d7<\/td><td>\u2605\u2605\u2605\u2605\u2605<\/td><\/tr><tr><td><strong>PNG<\/strong><\/td><td>\u2605\u2606\u2606\u2606\u2606<\/td><td>\u2605\u2605\u2605\u2605\u2605<\/td><td>\u25cb<\/td><td>\u00d7<\/td><td>\u2605\u2605\u2605\u2605\u2605<\/td><\/tr><tr><td><strong>WebP<\/strong><\/td><td>\u2605\u2605\u2605\u2605\u2606<\/td><td>\u2605\u2605\u2605\u2605\u2606<\/td><td>\u25cb<\/td><td>\u25cb<\/td><td>\u2605\u2605\u2605\u2605\u2606<\/td><\/tr><tr><td><strong>AVIF<\/strong><\/td><td>\u2605\u2605\u2605\u2605\u2605<\/td><td>\u2605\u2605\u2605\u2605\u2605<\/td><td>\u25cb<\/td><td>\u25cb<\/td><td>\u2605\u2605\u2605\u2606\u2606<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">JPEG vs AVIF<\/h3>\n\n\n\n<p>JPEG\uff08Joint Photographic Experts Group\uff09\u306f1992\u5e74\u306b\u7b56\u5b9a\u3055\u308c\u305f\u3001\u6700\u3082\u666e\u53ca\u3057\u3066\u3044\u308b\u753b\u50cf\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>JPEG\u306e\u7279\u5fb4\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3059\u3079\u3066\u306e\u30d6\u30e9\u30a6\u30b6\u3068\u30c7\u30d0\u30a4\u30b9\u3067\u30b5\u30dd\u30fc\u30c8<\/li>\n\n\n\n<li>\u975e\u53ef\u9006\u5727\u7e2e\u306b\u3088\u308a\u3001\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3092\u8abf\u6574\u53ef\u80fd<\/li>\n\n\n\n<li>\u9ad8\u5727\u7e2e\u6642\u306b\u30d6\u30ed\u30c3\u30af\u30ce\u30a4\u30ba\u304c\u767a\u751f<\/li>\n\n\n\n<li>\u900f\u904e\u753b\u50cf\u3084\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306f\u975e\u5bfe\u5fdc<\/li>\n<\/ul>\n\n\n\n<p><strong>AVIF\u3068\u306e\u6bd4\u8f03\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba<\/strong>: AVIF\u306fJPEG\u306e\u7d0450%\u306e\u30b5\u30a4\u30ba\u3067\u540c\u7b49\u753b\u8cea\u3092\u5b9f\u73fe<\/li>\n\n\n\n<li><strong>\u753b\u8cea<\/strong>: AVIF\u306f\u9ad8\u5727\u7e2e\u3067\u3082\u8996\u899a\u7684\u52a3\u5316\u304c\u5c11\u306a\u3044<\/li>\n\n\n\n<li><strong>\u6a5f\u80fd\u6027<\/strong>: AVIF\u306f\u900f\u904e\u3084HDR\u306a\u3069\u591a\u6a5f\u80fd<\/li>\n\n\n\n<li><strong>\u4e92\u63db\u6027<\/strong>: JPEG\u306f\u5168\u30d6\u30e9\u30a6\u30b6\u5bfe\u5fdc\u3060\u304c\u3001AVIF\u306f\u4e00\u90e8\u672a\u5bfe\u5fdc<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">PNG vs AVIF<\/h3>\n\n\n\n<p>PNG\uff08Portable Network Graphics\uff09\u306f\u53ef\u9006\u5727\u7e2e\u306e\u753b\u50cf\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u3001\u4e3b\u306b\u900f\u904e\u753b\u50cf\u3084\u30ed\u30b4\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>PNG\u306e\u7279\u5fb4\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53ef\u9006\u5727\u7e2e\u306b\u3088\u308a\u3001\u753b\u8cea\u52a3\u5316\u304c\u30bc\u30ed<\/li>\n\n\n\n<li>\u900f\u904e\u753b\u50cf\uff08\u30a2\u30eb\u30d5\u30a1\u30c1\u30e3\u30f3\u30cd\u30eb\uff09\u3092\u30b5\u30dd\u30fc\u30c8<\/li>\n\n\n\n<li>\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u304c\u5927\u304d\u304f\u306a\u308a\u304c\u3061<\/li>\n\n\n\n<li>\u5199\u771f\u3088\u308a\u3082\u30a4\u30e9\u30b9\u30c8\u3084\u30ed\u30b4\u306b\u9069\u3057\u3066\u3044\u308b<\/li>\n<\/ul>\n\n\n\n<p><strong>AVIF\u3068\u306e\u6bd4\u8f03\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba<\/strong>: AVIF\u306fPNG\u306e\u7d0430-40%\u306e\u30b5\u30a4\u30ba\u3067\u8996\u899a\u7684\u306b\u540c\u7b49\u306e\u753b\u8cea<\/li>\n\n\n\n<li><strong>\u900f\u904e\u5bfe\u5fdc<\/strong>: \u4e21\u65b9\u3068\u3082\u900f\u904e\u306b\u5bfe\u5fdc<\/li>\n\n\n\n<li><strong>\u5727\u7e2e\u65b9\u5f0f<\/strong>: PNG\u306f\u53ef\u9006\u3001AVIF\u306f\u975e\u53ef\u9006\uff08\u305f\u3060\u3057\u9ad8\u54c1\u8cea\uff09<\/li>\n\n\n\n<li><strong>\u7528\u9014<\/strong>: \u30ed\u30b4\u3084\u30a2\u30a4\u30b3\u30f3\u3067\u306fAVIF\u306e\u65b9\u304c\u52b9\u7387\u7684<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">WebP vs AVIF<\/h3>\n\n\n\n<p>WebP\u306fGoogle\u304c\u958b\u767a\u3057\u305f\u753b\u50cf\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u3001AVIF\u306e\u5148\u99c6\u3051\u3068\u306a\u3063\u305f\u6b21\u4e16\u4ee3\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>WebP\u306e\u7279\u5fb4\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>JPEG\u3088\u308a\u308225-35%\u5c0f\u3055\u3044\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba<\/li>\n\n\n\n<li>\u900f\u904e\u753b\u50cf\u3068\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u30b5\u30dd\u30fc\u30c8<\/li>\n\n\n\n<li>\u4e3b\u8981\u30d6\u30e9\u30a6\u30b6\u3067\u5e83\u304f\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b<\/li>\n\n\n\n<li>\u53ef\u9006\u30fb\u975e\u53ef\u9006\u306e\u4e21\u65b9\u306e\u5727\u7e2e\u65b9\u5f0f\u3092\u30b5\u30dd\u30fc\u30c8<\/li>\n<\/ul>\n\n\n\n<p><strong>AVIF\u3068\u306e\u6bd4\u8f03\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba<\/strong>: AVIF\u306fWebP\u3088\u308a\u3055\u3089\u306b20-30%\u5c0f\u3055\u3044<\/li>\n\n\n\n<li><strong>\u753b\u8cea<\/strong>: \u540c\u30b5\u30a4\u30ba\u3067AVIF\u306e\u65b9\u304c\u9ad8\u753b\u8cea<\/li>\n\n\n\n<li><strong>HDR\u5bfe\u5fdc<\/strong>: AVIF\u306fHDR\u3092\u30b5\u30dd\u30fc\u30c8\u3001WebP\u306f\u975e\u5bfe\u5fdc<\/li>\n\n\n\n<li><strong>\u30d6\u30e9\u30a6\u30b6\u5bfe\u5fdc<\/strong>: WebP\u306e\u65b9\u304c\u5e83\u304f\u5bfe\u5fdc\u3055\u308c\u3066\u3044\u308b<\/li>\n\n\n\n<li><strong>\u5909\u63db\u901f\u5ea6<\/strong>: WebP\u306e\u65b9\u304c\u5909\u63db\u30fb\u30c7\u30b3\u30fc\u30c9\u304c\u9ad8\u901f<\/li>\n<\/ul>\n\n\n\n<p>WebP\u306f\u73fe\u6642\u70b9\u3067\u306e\u5b9f\u7528\u6027\u304c\u9ad8\u304f\u3001AVIF\u306f\u5c06\u6765\u6027\u3068\u6027\u80fd\u306b\u512a\u308c\u3066\u3044\u307e\u3059\u3002<strong><span class=\"swl-marker mark_yellow\">\u7406\u60f3\u7684\u306b\u306f\u3001AVIF\u3092\u30e1\u30a4\u30f3\u3068\u3057\u3001WebP\u3092\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\uff08\u4ee3\u66ff\uff09\u3068\u3057\u3066\u63d0\u4f9b\u3059\u308b\u6226\u7565<\/span><\/strong>\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-14.48.08.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u751f\u5f92<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>AVIF\u3063\u3066\u3001\u4ed6\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3068\u6bd4\u3079\u3066\u304b\u306a\u308a\u512a\u79c0\u306a\u3093\u3067\u3059\u306d\uff01\u3067\u3082\u3001\u3069\u3046\u3084\u3063\u3066\u65e2\u5b58\u306e\u753b\u50cf\u3092AVIF\u306b\u5909\u63db\u3059\u308c\u3070\u826f\u3044\u3093\u3067\u3059\u304b\uff1f<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.11.23.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u826f\u3044\u8cea\u554f\u3058\u3083\uff01\u3053\u308c\u304b\u3089\u5b9f\u969b\u306e\u5909\u63db\u65b9\u6cd5\u3092\u8907\u6570\u7d39\u4ecb\u3059\u308b\u305e\u3044\u3002\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30c4\u30fc\u30eb\u3001\u30aa\u30f3\u30e9\u30a4\u30f3\u30c4\u30fc\u30eb\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u81ea\u52d5\u5316\u306a\u3069\u3001\u7528\u9014\u306b\u5fdc\u3058\u3066\u9078\u3079\u308b\u3093\u3058\u3083\uff01<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">AVIF\u3078\u306e\u81ea\u52d5\u5909\u63db\u65b9\u6cd5\uff1a\u5b9f\u8df5\u7de8<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignleft size-full\"><img decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006518.jpg\" alt=\"\" class=\"wp-image-13000\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006518.jpg 1536w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006518-768x512.jpg 768w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-14.48.08.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u751f\u5f92<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>AVIF\u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5\u3092\u6559\u3048\u3066\u304f\u3060\u3055\u3044\uff01<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.08.37.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u3046\u3080\u3002\u3053\u3053\u3067\u306fAVIF\u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5\u30925\u3064\u7d39\u4ecb\u3059\u308b\u305e\uff01<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h3 class=\"wp-block-heading\">\u65b9\u6cd51: ffmpeg\u3092\u4f7f\u3063\u305f\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u5909\u63db<\/h3>\n\n\n\n<p>ffmpeg\u306f\u52d5\u753b\u30fb\u97f3\u58f0\u30fb\u753b\u50cf\u3092\u51e6\u7406\u3067\u304d\u308b\u5f37\u529b\u306a\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u30c4\u30fc\u30eb\u3067\u3059\u3002AVIF\u3078\u306e\u5909\u63db\u3082\u7c21\u5358\u306b\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">ffmpeg\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/h4>\n\n\n\n<p><strong>macOS\uff08Homebrew\u4f7f\u7528\uff09\uff1a<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>brew install ffmpeg<\/code><\/pre><\/div>\n\n\n\n<p><strong>Ubuntu\/Debian\uff1a<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>sudo apt update\nsudo apt install ffmpeg<\/code><\/pre><\/div>\n\n\n\n<p><strong>Windows\uff1a<\/strong><\/p>\n\n\n\n<p>\u516c\u5f0f\u30b5\u30a4\u30c8\uff08<a href=\"https:\/\/ffmpeg.org\/download.htm\">https:\/\/ffmpeg.org\/download.htm<\/a>l\uff09\u304b\u3089\u30d0\u30a4\u30ca\u30ea\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3001\u74b0\u5883\u5909\u6570PATH\u306b\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u57fa\u672c\u7684\u306a\u5909\u63db\u30b3\u30de\u30f3\u30c9<\/h4>\n\n\n\n<p>1\u679a\u306e\u753b\u50cf\u3092AVIF\u306b\u5909\u63db\u3059\u308b\u57fa\u672c\u30b3\u30de\u30f3\u30c9\uff1a<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>ffmpeg -i input.jpg -c:v libaom-av1 -crf 30 output.avif<\/code><\/pre><\/div>\n\n\n\n<p><strong>\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u8aac\u660e\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>-i input.jpg<\/code>: \u5165\u529b\u30d5\u30a1\u30a4\u30eb\u3092\u6307\u5b9a<\/li>\n\n\n\n<li><code>-c:v libaom-av1<\/code>: AV1\u30b3\u30fc\u30c7\u30c3\u30af\u3092\u4f7f\u7528\uff08AVIF\u306e\u30d9\u30fc\u30b9\uff09<\/li>\n\n\n\n<li><code>-crf 30<\/code>: \u54c1\u8cea\u3092\u6307\u5b9a\uff080-63\u3001\u6570\u5024\u304c\u5c0f\u3055\u3044\u307b\u3069\u9ad8\u54c1\u8cea\u3002\u63a8\u5968\uff1a25-35\uff09<\/li>\n\n\n\n<li><code>output.avif<\/code>: \u51fa\u529b\u30d5\u30a1\u30a4\u30eb\u540d<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u54c1\u8cea\u3092\u6700\u9069\u5316\u3057\u305f\u5909\u63db<\/h4>\n\n\n\n<p>\u9ad8\u54c1\u8cea\u3092\u7dad\u6301\u3057\u306a\u304c\u3089\u52b9\u7387\u7684\u306b\u5727\u7e2e\uff1a<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>ffmpeg -i input.jpg -c:v libaom-av1 -crf 25 -cpu-used 4 output.avif<\/code><\/pre><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>-cpu-used 4<\/code>: \u30a8\u30f3\u30b3\u30fc\u30c9\u901f\u5ea6\u306e\u8abf\u6574\uff080-8\u3001\u6570\u5024\u304c\u5927\u304d\u3044\u307b\u3069\u9ad8\u901f\u3060\u304c\u54c1\u8cea\u4f4e\u4e0b\uff09<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u8907\u6570\u753b\u50cf\u306e\u4e00\u62ec\u5909\u63db<\/h4>\n\n\n\n<p>\u30d5\u30a9\u30eb\u30c0\u5185\u306e\u3059\u3079\u3066\u306eJPEG\u753b\u50cf\u3092\u4e00\u62ec\u5909\u63db\u3059\u308b\u30b9\u30af\u30ea\u30d7\u30c8\uff1a<\/p>\n\n\n\n<p><strong>bash\uff08Linux\/macOS\uff09\uff1a<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-bash\" data-lang=\"Bash\"><code>#!\/bin\/bash\nfor img in *.jpg; do\n  ffmpeg -i &quot;$img&quot; -c:v libaom-av1 -crf 30 &quot;${img%.jpg}.avif&quot;\ndone<\/code><\/pre><\/div>\n\n\n\n<p><strong>PowerShell\uff08Windows\uff09\uff1a<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>Get-ChildItem -Filter *.jpg | ForEach-Object {\n  $output = $_.BaseName + &quot;.avif&quot;\n  ffmpeg -i $_.FullName -c:v libaom-av1 -crf 30 $output\n}<\/code><\/pre><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3AVIF\u306e\u4f5c\u6210<\/h4>\n\n\n\n<p>\u8907\u6570\u306e\u9759\u6b62\u753b\u304b\u3089\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3AVIF\u3092\u4f5c\u6210\uff1a<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>ffmpeg -framerate 10 -i frame_%03d.png -c:v libaom-av1 -crf 30 animation.avif<\/code><\/pre><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>-framerate 10<\/code>: \u79d2\u959310\u30d5\u30ec\u30fc\u30e0\u3067\u518d\u751f<\/li>\n\n\n\n<li><code>frame_%03d.png<\/code>: frame_001.png, frame_002.png&#8230; \u306e\u3088\u3046\u306a\u9023\u756a\u30d5\u30a1\u30a4\u30eb<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u65b9\u6cd52: avifenc\u3092\u4f7f\u3063\u305f\u9ad8\u901f\u5909\u63db<\/h3>\n\n\n\n<p><strong>avifenc<\/strong>\u306flibavif\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u542b\u307e\u308c\u308b\u3001AVIF\u5c02\u7528\u306e\u30a8\u30f3\u30b3\u30fc\u30c0\u30fc\u3067\u3059\u3002ffmpeg\u3088\u308a\u3082\u9ad8\u901f\u3067\u52b9\u7387\u7684\u306a\u5909\u63db\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/h4>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code># macOS\nbrew install libavif\n\n# Ubuntu\/Debian\nsudo apt install libavif-bin<\/code><\/pre><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">\u57fa\u672c\u7684\u306a\u5909\u63db<\/h4>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>avifenc input.jpg output.avif<\/code><\/pre><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">\u54c1\u8cea\u3068\u901f\u5ea6\u3092\u6307\u5b9a\u3057\u305f\u5909\u63db<\/h4>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>avifenc --min 0 --max 63 --speed 6 input.jpg output.avif<\/code><\/pre><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>--min 0 --max 63<\/code>: \u54c1\u8cea\u7bc4\u56f2\u3092\u6307\u5b9a\uff080\u304c\u6700\u9ad8\u54c1\u8cea\uff09<\/li>\n\n\n\n<li><code>--speed 6<\/code>: \u30a8\u30f3\u30b3\u30fc\u30c9\u901f\u5ea6\uff080-10\u3001\u5927\u304d\u3044\u307b\u3069\u9ad8\u901f\uff09<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u65b9\u6cd53: Node.js\u3067\u306e\u81ea\u52d5\u5909\u63db<\/h3>\n\n\n\n<p>Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u7d71\u5408\u3059\u308b\u5834\u5408\u3001Node.js\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3059\u308b\u3068\u4fbf\u5229\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">sharp\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3057\u305f\u5b9f\u88c5<\/h4>\n\n\n\n<p>sharp\u306f\u9ad8\u901f\u306a\u753b\u50cf\u51e6\u7406\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3001AVIF\u3078\u306e\u5909\u63db\u3082\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\uff1a<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>npm install sharp<\/code><\/pre><\/div>\n\n\n\n<p><strong>\u57fa\u672c\u7684\u306a\u5909\u63db\u30b3\u30fc\u30c9\uff1a<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-lang=\"JavaScript\"><code>const sharp = require(&#39;sharp&#39;);\n\n\/\/ 1\u679a\u306e\u753b\u50cf\u3092\u5909\u63db\nsharp(&#39;input.jpg&#39;)\n  .avif({ quality: 50 })\n  .toFile(&#39;output.avif&#39;)\n  .then(info =&gt; {\n    console.log(&#39;\u5909\u63db\u5b8c\u4e86:&#39;, info);\n  })\n  .catch(err =&gt; {\n    console.error(&#39;\u5909\u63db\u30a8\u30e9\u30fc:&#39;, err);\n  });<\/code><\/pre><\/div>\n\n\n\n<p><strong>\u8907\u6570\u753b\u50cf\u306e\u4e00\u62ec\u5909\u63db\u30b9\u30af\u30ea\u30d7\u30c8\uff1a<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-ts\" data-lang=\"TypeScript\"><code>const sharp = require(&#39;sharp&#39;);\nconst fs = require(&#39;fs&#39;);\nconst path = require(&#39;path&#39;);\n\n\/\/ \u753b\u50cf\u30d5\u30a9\u30eb\u30c0\u3092\u6307\u5b9a\nconst inputDir = &#39;.\/images&#39;;\nconst outputDir = &#39;.\/images-avif&#39;;\n\n\/\/ \u51fa\u529b\u30d5\u30a9\u30eb\u30c0\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306f\u4f5c\u6210\nif (!fs.existsSync(outputDir)) {\n  fs.mkdirSync(outputDir);\n}\n\n\/\/ JPEG\u3068PNG\u30d5\u30a1\u30a4\u30eb\u3092\u53d6\u5f97\nconst imageFiles = fs.readdirSync(inputDir)\n  .filter(file =&gt; \/\\.(jpg|jpeg|png)$\/i.test(file));\n\n\/\/ \u5404\u753b\u50cf\u3092\u5909\u63db\nPromise.all(\n  imageFiles.map(file =&gt; {\n    const inputPath = path.join(inputDir, file);\n    const outputPath = path.join(outputDir, file.replace(\/\\.(jpg|jpeg|png)$\/i, &#39;.avif&#39;));\n\n    return sharp(inputPath)\n      .avif({\n        quality: 50,\n        effort: 6  \/\/ 0-9\u3001\u5927\u304d\u3044\u307b\u3069\u5727\u7e2e\u52b9\u7387\u304c\u826f\u3044\u304c\u6642\u9593\u304c\u304b\u304b\u308b\n      })\n      .toFile(outputPath)\n      .then(info =&gt; {\n        console.log(`\u2713 ${file} \u2192 ${path.basename(outputPath)} (${info.size} bytes)`);\n      });\n  })\n)\n.then(() =&gt; {\n  console.log(&#39;\u3059\u3079\u3066\u306e\u753b\u50cf\u306e\u5909\u63db\u304c\u5b8c\u4e86\u3057\u307e\u3057\u305f\uff01&#39;);\n})\n.catch(err =&gt; {\n  console.error(&#39;\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f:&#39;, err);\n});<\/code><\/pre><\/div>\n\n\n\n<p><strong>\u30ea\u30b5\u30a4\u30ba\u3068AVIF\u5909\u63db\u3092\u540c\u6642\u306b\u5b9f\u884c\uff1a<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-lang=\"JavaScript\"><code>sharp(&#39;large-image.jpg&#39;)\n  .resize(1200, 800, {\n    fit: &#39;inside&#39;,  \/\/ \u30a2\u30b9\u30da\u30af\u30c8\u6bd4\u3092\u7dad\u6301\n    withoutEnlargement: true  \/\/ \u5143\u753b\u50cf\u3088\u308a\u5927\u304d\u304f\u3057\u306a\u3044\n  })\n  .avif({ quality: 50 })\n  .toFile(&#39;optimized.avif&#39;);<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">\u65b9\u6cd54: \u30aa\u30f3\u30e9\u30a4\u30f3\u30c4\u30fc\u30eb\u3067\u306e\u5909\u63db<\/h3>\n\n\n\n<p>\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u3084\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u6163\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u3001\u30aa\u30f3\u30e9\u30a4\u30f3\u30c4\u30fc\u30eb\u304c\u4fbf\u5229\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u304a\u3059\u3059\u3081\u306e\u30aa\u30f3\u30e9\u30a4\u30f3\u5909\u63db\u30c4\u30fc\u30eb<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Squoosh\uff08<a href=\"https:\/\/squoosh.app\/\">https:\/\/squoosh.app\/<\/a>\uff09<\/strong> <ul><li>Google\u304c\u63d0\u4f9b\u3059\u308b\u7121\u6599\u30c4\u30fc\u30eb<\/li> <li>\u30d6\u30e9\u30a6\u30b6\u4e0a\u3067\u5b8c\u7d50\uff08\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u4e0d\u8981\uff09<\/li> <li>Before\/After\u306e\u6bd4\u8f03\u304c\u8996\u899a\u7684\u306b\u53ef\u80fd<\/li> <li>\u54c1\u8cea\u3068\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u3092\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u8abf\u6574<\/li> <\/ul><\/li>\n\n\n\n<li><strong>CloudConvert\uff08<a href=\"https:\/\/cloudconvert.com\/\">https:\/\/cloudconvert.com\/<\/a>\uff09<\/strong> <ul><li>200\u4ee5\u4e0a\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306b\u5bfe\u5fdc<\/li> <li>\u30d0\u30c3\u30c1\u51e6\u7406\uff08\u8907\u6570\u30d5\u30a1\u30a4\u30eb\u306e\u4e00\u62ec\u5909\u63db\uff09\u304c\u53ef\u80fd<\/li> <li>API\u7d4c\u7531\u3067\u306e\u81ea\u52d5\u5316\u3082\u53ef\u80fd<\/li> <\/ul><\/li>\n\n\n\n<li><strong>AVIF.io\uff08<a href=\"https:\/\/avif.io\/\">https:\/\/avif.io\/<\/a>\uff09<\/strong> <ul><li>AVIF\u5c02\u9580\u306e\u5909\u63db\u30b5\u30fc\u30d3\u30b9<\/li> <li>\u30b7\u30f3\u30d7\u30eb\u3067\u4f7f\u3044\u3084\u3059\u3044UI<\/li> <li>\u7121\u6599\u3067\u5229\u7528\u53ef\u80fd<\/li> <\/ul><\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u65b9\u6cd55: WordPress \u3067\u306eAVIF\u81ea\u52d5\u5909\u63db<\/h3>\n\n\n\n<p>WordPress\u30b5\u30a4\u30c8\u306e\u5834\u5408\u3001\u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u7c21\u5358\u306bAVIF\u3092\u5c0e\u5165\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u304a\u3059\u3059\u3081\u30d7\u30e9\u30b0\u30a4\u30f3<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>EWWW Image Optimizer<\/strong>\n<ul>\n<li>\u753b\u50cf\u3092\u81ea\u52d5\u7684\u306bAVIF\/WebP\u306b\u5909\u63db<\/li>\n<li>\u65e2\u5b58\u753b\u50cf\u306e\u4e00\u62ec\u5909\u63db\u304c\u53ef\u80fd<\/li>\n<li>\u30d6\u30e9\u30a6\u30b6\u5bfe\u5fdc\u306b\u5fdc\u3058\u3066\u81ea\u52d5\u5207\u308a\u66ff\u3048<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>ShortPixel Image Optimizer<\/strong>\n<ul>\n<li>\u30af\u30e9\u30a6\u30c9\u30d9\u30fc\u30b9\u306e\u9ad8\u901f\u5909\u63db<\/li>\n<li>\u7121\u6599\u30d7\u30e9\u30f3\u3042\u308a\uff08\u6708100\u679a\u307e\u3067\uff09<\/li>\n<li>AVIF\u3001WebP\u3001JPEG XL\u306b\u5bfe\u5fdc<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Imagify<\/strong>\n<ul>\n<li>\u76f4\u611f\u7684\u306aUI<\/li>\n<li>3\u6bb5\u968e\u306e\u5727\u7e2e\u30ec\u30d9\u30eb\u9078\u629e<\/li>\n<li>CDN\u7d71\u5408\u30aa\u30d7\u30b7\u30e7\u30f3<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">HTML\/CSS\u3067\u306eAVIF\u5b9f\u88c5\u65b9\u6cd5<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignleft size-full\"><img decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006519.jpg\" alt=\"\" class=\"wp-image-13001\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006519.jpg 1536w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006519-768x512.jpg 768w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.09.27.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>AVIF\u753b\u50cf\u3092\u4f5c\u6210\u3057\u305f\u3089\u3001\u6b21\u306fWeb\u30b5\u30a4\u30c8\u306b\u5b9f\u88c5\u3059\u308b\u65b9\u6cd5\u3092\u898b\u3066\u3044\u3053\u3046\u3002\u91cd\u8981\u306a\u306e\u306f\u3001AVIF\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u30d6\u30e9\u30a6\u30b6\u3078\u306e\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\uff08\u4ee3\u66ff\u624b\u6bb5\uff09\u3092\u7528\u610f\u3059\u308b\u3053\u3068\u3058\u3083\uff01<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-14.48.08.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u751f\u5f92<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u305d\u3046\u306a\u3093\u3067\u3059\u306d\uff01\u5177\u4f53\u7684\u306b\u6559\u3048\u3066\u304f\u3060\u3055\u3044\uff01<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h3 class=\"wp-block-heading\">picture\u30bf\u30b0\u3092\u4f7f\u3063\u305f\u5b9f\u88c5\uff08\u63a8\u5968\uff09<\/h3>\n\n\n\n<p><code>&lt;picture&gt;<\/code>\u30bf\u30b0\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30d6\u30e9\u30a6\u30b6\u304c\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u81ea\u52d5\u7684\u306b\u9078\u629e\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>&lt;picture&gt;\n  &lt;!-- AVIF\u5bfe\u5fdc\u30d6\u30e9\u30a6\u30b6\u306f\u3053\u3061\u3089\u3092\u8aad\u307f\u8fbc\u307f --&gt;\n  &lt;source srcset=&quot;image.avif&quot; type=&quot;image\/avif&quot;&gt;\n\n  &lt;!-- WebP\u5bfe\u5fdc\u30d6\u30e9\u30a6\u30b6\u306f\u3053\u3061\u3089\u3092\u8aad\u307f\u8fbc\u307f --&gt;\n  &lt;source srcset=&quot;image.webp&quot; type=&quot;image\/webp&quot;&gt;\n\n  &lt;!-- \u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\uff1a\u3059\u3079\u3066\u306e\u30d6\u30e9\u30a6\u30b6\u3067\u8868\u793a\u53ef\u80fd --&gt;\n  &lt;img src=&quot;image.jpg&quot; alt=&quot;\u8aac\u660e\u6587&quot; loading=&quot;lazy&quot;&gt;\n&lt;\/picture&gt;\n<\/code><\/pre><\/div>\n\n\n\n<p><strong>\u30d6\u30e9\u30a6\u30b6\u306e\u5224\u5b9a\u30ed\u30b8\u30c3\u30af\uff1a<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d6\u30e9\u30a6\u30b6\u306f\u4e0a\u304b\u3089\u9806\u306b<code>&lt;source&gt;<\/code>\u30bf\u30b0\u3092\u78ba\u8a8d<\/li>\n\n\n\n<li>\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u898b\u3064\u3051\u305f\u3089\u3001\u305d\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080<\/li>\n\n\n\n<li>\u3069\u306e<code>&lt;source&gt;<\/code>\u3082\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u3001<code>&lt;img&gt;<\/code>\u30bf\u30b0\u306eJPEG\u3092\u8868\u793a<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u753b\u50cf\u3068\u306e\u7d44\u307f\u5408\u308f\u305b<\/h3>\n\n\n\n<p>\u7570\u306a\u308b\u753b\u9762\u30b5\u30a4\u30ba\u306b\u5fdc\u3058\u3066\u6700\u9069\u306a\u753b\u50cf\u3092\u914d\u4fe1\uff1a<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-html\" data-lang=\"HTML\"><code>&lt;picture&gt;\n  &lt;!-- \u30c7\u30b9\u30af\u30c8\u30c3\u30d7\u7528 AVIF --&gt;\n  &lt;source\n    media=&quot;(min-width: 1024px)&quot;\n    srcset=&quot;image-large.avif&quot;\n    type=&quot;image\/avif&quot;&gt;\n\n  &lt;!-- \u30bf\u30d6\u30ec\u30c3\u30c8\u7528 AVIF --&gt;\n  &lt;source\n    media=&quot;(min-width: 768px)&quot;\n    srcset=&quot;image-medium.avif&quot;\n    type=&quot;image\/avif&quot;&gt;\n\n  &lt;!-- \u30e2\u30d0\u30a4\u30eb\u7528 AVIF --&gt;\n  &lt;source\n    srcset=&quot;image-small.avif&quot;\n    type=&quot;image\/avif&quot;&gt;\n\n  &lt;!-- WebP\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af --&gt;\n  &lt;source\n    media=&quot;(min-width: 1024px)&quot;\n    srcset=&quot;image-large.webp&quot;\n    type=&quot;image\/webp&quot;&gt;\n  &lt;source\n    media=&quot;(min-width: 768px)&quot;\n    srcset=&quot;image-medium.webp&quot;\n    type=&quot;image\/webp&quot;&gt;\n  &lt;source\n    srcset=&quot;image-small.webp&quot;\n    type=&quot;image\/webp&quot;&gt;\n\n  &lt;!-- \u6700\u7d42\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af --&gt;\n  &lt;img src=&quot;image-medium.jpg&quot; alt=&quot;\u8aac\u660e\u6587&quot; loading=&quot;lazy&quot;&gt;\n&lt;\/picture&gt;<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">CSS\u3067\u306e\u80cc\u666f\u753b\u50cf\u5b9f\u88c5<\/h3>\n\n\n\n<p>CSS\u306e\u80cc\u666f\u753b\u50cf\u3067AVIF\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3001JavaScript\u3067\u30d6\u30e9\u30a6\u30b6\u5bfe\u5fdc\u3092\u691c\u51fa\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>JavaScript\uff08\u30d6\u30e9\u30a6\u30b6\u5bfe\u5fdc\u691c\u51fa\uff09\uff1a<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-lang=\"JavaScript\"><code>\/\/ AVIF\u30b5\u30dd\u30fc\u30c8\u691c\u51fa\nasync function supportsAVIF() {\n  if (!self.createImageBitmap) return false;\n\n  const avifData = &#39;data:image\/avif;base64,AAAAIGZ0eXBhdmlmAAAAAGF2aWZtaWYxbWlhZk1BMUEAAADybWV0YQAAAAAAAAAoaGRscgAAAAAAAAAAcGljdAAAAAAAAAAAAAAAAGxpYmF2aWYAAAAADnBpdG0AAAAAAAEAAAAeaWxvYwAAAABEAAABAAEAAAABAAABGgAAAB0AAAAoaWluZgAAAAAAAQAAABppbmZlAgAAAAABAABhdjAxQ29sb3IAAAAAamlwcnAAAABLaXBjbwAAABRpc3BlAAAAAAAAAAEAAAABAAAAEHBpeGkAAAAAAwgICAAAAAxhdjFDgQ0MAAAAABNjb2xybmNseAACAAIAAYAAAAAXaXBtYQAAAAAAAAABAAEEAQKDBAAAACVtZGF0EgAKCBgANogQEAwgMg8f8D\/\/\/8WfhwB8+ErK42A=&#39;;\n\n  try {\n    const blob = await fetch(avifData).then(r =&gt; r.blob());\n    return await createImageBitmap(blob).then(() =&gt; true, () =&gt; false);\n  } catch {\n    return false;\n  }\n}\n\n\/\/ \u30da\u30fc\u30b8\u8aad\u307f\u8fbc\u307f\u6642\u306b\u691c\u51fa\nsupportsAVIF().then(supported =&gt; {\n  if (supported) {\n    document.documentElement.classList.add(&#39;avif&#39;);\n  } else {\n    document.documentElement.classList.add(&#39;no-avif&#39;);\n  }\n});<\/code><\/pre><\/div>\n\n\n\n<p><strong>CSS\uff08\u6761\u4ef6\u5206\u5c90\uff09\uff1a<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-css\" data-lang=\"CSS\"><code>\/* AVIF\u5bfe\u5fdc\u30d6\u30e9\u30a6\u30b6 *\/\n.avif .hero-section {\n  background-image: url(&#39;hero.avif&#39;);\n}\n\n\/* AVIF\u975e\u5bfe\u5fdc\u30d6\u30e9\u30a6\u30b6 *\/\n.no-avif .hero-section {\n  background-image: url(&#39;hero.jpg&#39;);\n}<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Next.js\u3067\u306e\u5b9f\u88c5<\/h3>\n\n\n\n<p>Next.js 13\u4ee5\u964d\u3067\u306f\u3001<code>&lt;Image&gt;<\/code>\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u81ea\u52d5\u7684\u306bAVIF\u3092\u751f\u6210\u30fb\u914d\u4fe1\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-lang=\"JavaScript\"><code>import Image from &#39;next\/image&#39;;\n\nexport default function MyComponent() {\n  return (\n    &lt;Image\n      src=&quot;\/images\/photo.jpg&quot;\n      alt=&quot;\u5199\u771f\u306e\u8aac\u660e&quot;\n      width={800}\n      height={600}\n      quality={75}\n      \/\/ Next.js\u304c\u81ea\u52d5\u7684\u306bAVIF\/WebP\/JPEG\u3092\u751f\u6210\u3057\u3001\n      \/\/ \u30d6\u30e9\u30a6\u30b6\u306b\u5fdc\u3058\u3066\u6700\u9069\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u914d\u4fe1\n    \/&gt;\n  );\n}<\/code><\/pre><\/div>\n\n\n\n<p><strong>next.config.js\u3067\u306e\u8a2d\u5b9a\uff1a<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-js\" data-lang=\"JavaScript\"><code>module.exports = {\n  images: {\n    formats: [&#39;image\/avif&#39;, &#39;image\/webp&#39;],\n    deviceSizes: [640, 750, 828, 1080, 1200, 1920, 2048, 3840],\n    imageSizes: [16, 32, 48, 64, 96, 128, 256, 384],\n  },\n};<\/code><\/pre><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u30d6\u30e9\u30a6\u30b6\u5bfe\u5fdc\u72b6\u6cc1\u3068\u5b9f\u88c5\u4e0a\u306e\u6ce8\u610f\u70b9<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignleft size-full\"><img decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006520.jpg\" alt=\"\" class=\"wp-image-13002\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006520.jpg 1536w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006520-768x512.jpg 768w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<\/div>\n\n\n<p>AVIF\u306f\u512a\u308c\u305f\u6027\u80fd\u3092\u6301\u3064\u4e00\u65b9\u3067\u3001\u3059\u3079\u3066\u306e\u30d6\u30e9\u30a6\u30b6\u3067\u5bfe\u5fdc\u3055\u308c\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u5b9f\u88c5\u524d\u306b\u5bfe\u5fdc\u72b6\u6cc1\u3092\u78ba\u8a8d\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e3b\u8981\u30d6\u30e9\u30a6\u30b6\u306e\u5bfe\u5fdc\u72b6\u6cc1\uff082026\u5e742\u6708\u6642\u70b9\uff09<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30d6\u30e9\u30a6\u30b6<\/th><th>\u5bfe\u5fdc\u30d0\u30fc\u30b8\u30e7\u30f3<\/th><th>\u5bfe\u5fdc\u72b6\u6cc1<\/th><\/tr><\/thead><tbody><tr><td><strong>Chrome<\/strong><\/td><td>85\u4ee5\u964d<\/td><td>\u5b8c\u5168\u5bfe\u5fdc<\/td><\/tr><tr><td><strong>Edge<\/strong><\/td><td>85\u4ee5\u964d<\/td><td>\u5b8c\u5168\u5bfe\u5fdc<\/td><\/tr><tr><td><strong>Firefox<\/strong><\/td><td>93\u4ee5\u964d<\/td><td>\u5b8c\u5168\u5bfe\u5fdc<\/td><\/tr><tr><td><strong>Safari<\/strong><\/td><td>16\u4ee5\u964d\uff08iOS 16\u3001macOS Ventura\uff09<\/td><td>\u5b8c\u5168\u5bfe\u5fdc<\/td><\/tr><tr><td><strong>Opera<\/strong><\/td><td>71\u4ee5\u964d<\/td><td>\u5b8c\u5168\u5bfe\u5fdc<\/td><\/tr><tr><td><strong>Samsung Internet<\/strong><\/td><td>15\u4ee5\u964d<\/td><td>\u5b8c\u5168\u5bfe\u5fdc<\/td><\/tr><tr><td><strong>Internet Explorer<\/strong><\/td><td>&#8211;<\/td><td>\u975e\u5bfe\u5fdc<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u73fe\u5728\u3001\u4e3b\u8981\u306a\u30e2\u30c0\u30f3\u30d6\u30e9\u30a6\u30b6\u306f\u3059\u3079\u3066AVIF\u306b\u5bfe\u5fdc\u3057\u3066\u304a\u308a\u3001<strong><span class=\"swl-marker mark_yellow\">\u5168\u4e16\u754c\u306e\u30d6\u30e9\u30a6\u30b6\u30b7\u30a7\u30a2\u306e\u7d0485-90%\u304cAVIF\u3092\u30b5\u30dd\u30fc\u30c8<\/span><\/strong>\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5b9f\u88c5\u4e0a\u306e\u6ce8\u610f\u70b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. \u5fc5\u305a\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u3092\u7528\u610f\u3059\u308b<\/h4>\n\n\n\n<p>AVIF\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u30d6\u30e9\u30a6\u30b6\u306e\u305f\u3081\u306b\u3001\u5fc5\u305aWebP\u3084JPEG\u306e\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u3092\u7528\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>&lt;picture&gt;\n  &lt;source srcset=&quot;image.avif&quot; type=&quot;image\/avif&quot;&gt;\n  &lt;source srcset=&quot;image.webp&quot; type=&quot;image\/webp&quot;&gt;\n  &lt;img src=&quot;image.jpg&quot; alt=&quot;\u8aac\u660e&quot; loading=&quot;lazy&quot;&gt;\n&lt;\/picture&gt;<\/code><\/pre><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">2. \u54c1\u8cea\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u6700\u9069\u5316<\/h4>\n\n\n\n<p>AVIF\u306e\u54c1\u8cea\u8a2d\u5b9a\u306f\u3001JPEG\u3088\u308a\u3082\u4f4e\u3044\u5024\u3067\u540c\u7b49\u306e\u753b\u8cea\u304c\u5f97\u3089\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u9ad8\u54c1\u8cea\uff08\u5199\u771f\u30fb\u5546\u54c1\u753b\u50cf\uff09<\/strong>: quality 60-80<\/li>\n\n\n\n<li><strong>\u6a19\u6e96\u54c1\u8cea\uff08\u4e00\u822c\u7684\u306a\u753b\u50cf\uff09<\/strong>: quality 50-60<\/li>\n\n\n\n<li><strong>\u4f4e\u54c1\u8cea\uff08\u30b5\u30e0\u30cd\u30a4\u30eb\uff09<\/strong>: quality 30-50<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">3. \u30a8\u30f3\u30b3\u30fc\u30c9\u6642\u9593\u3092\u8003\u616e\u3059\u308b<\/h4>\n\n\n\n<p>AVIF\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u306fJPEG\u3084WebP\u3088\u308a\u3082\u6642\u9593\u304c\u304b\u304b\u308a\u307e\u3059\u3002\u5927\u91cf\u306e\u753b\u50cf\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u306f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d3\u30eb\u30c9\u6642\u306b\u4e8b\u524d\u5909\u63db\u3059\u308b<\/li>\n\n\n\n<li>CDN\u306e\u81ea\u52d5\u5909\u63db\u6a5f\u80fd\u3092\u5229\u7528\u3059\u308b\uff08Cloudflare\u3001Cloudinary\u306a\u3069\uff09<\/li>\n\n\n\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u6d3b\u7528\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">4. \u30c7\u30b3\u30fc\u30c9\u8ca0\u8377\u3078\u306e\u914d\u616e<\/h4>\n\n\n\n<p>AVIF\u306f\u5727\u7e2e\u52b9\u7387\u304c\u9ad8\u3044\u53cd\u9762\u3001\u30c7\u30b3\u30fc\u30c9\uff08\u5c55\u958b\uff09\u306b\u82e5\u5e72\u306e\u51e6\u7406\u6642\u9593\u304c\u5fc5\u8981\u3067\u3059\u3002\u7279\u306b\u30ed\u30fc\u30a8\u30f3\u30c9\u306e\u30e2\u30d0\u30a4\u30eb\u30c7\u30d0\u30a4\u30b9\u3067\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>\u5bfe\u7b56\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>loading=\"lazy\"<\/code>\u5c5e\u6027\u3067\u9045\u5ef6\u8aad\u307f\u8fbc\u307f\u3092\u5b9f\u88c5<\/li>\n\n\n\n<li>\u30d5\u30a1\u30fc\u30b9\u30c8\u30d3\u30e5\u30fc\u306e\u753b\u50cf\u306f<code>loading=\"eager\"<\/code>\u3067\u5373\u5ea7\u306b\u8aad\u307f\u8fbc\u307f<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u753b\u50cf\u30b5\u30a4\u30ba\u3092\u914d\u4fe1\uff08\u904e\u5270\u306b\u5927\u304d\u306a\u753b\u50cf\u3092\u907f\u3051\u308b\uff09<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">5. SEO\u3078\u306e\u914d\u616e<\/h4>\n\n\n\n<p>\u753b\u50cf\u691c\u7d22\u306b\u304a\u3051\u308bSEO\u3067\u306f\u3001Google\u304c\u753b\u50cf\u3092\u30af\u30ed\u30fc\u30eb\u3067\u304d\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>&lt;img&gt;<\/code>\u30bf\u30b0\u306e<code>alt<\/code>\u5c5e\u6027\u3092\u5fc5\u305a\u8a2d\u5b9a<\/li>\n\n\n\n<li>\u30d5\u30a1\u30a4\u30eb\u540d\u3092\u308f\u304b\u308a\u3084\u3059\u304f\uff08<code>product-red-shirt.avif<\/code>\u306a\u3069\uff09<\/li>\n\n\n\n<li>\u69cb\u9020\u5316\u30c7\u30fc\u30bf\uff08Schema.org\uff09\u3067\u30e1\u30bf\u60c5\u5831\u3092\u63d0\u4f9b<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6539\u5584\u306e\u5b9f\u4f8b\u3068\u30c7\u30fc\u30bf<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignleft size-full\"><img decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006521.jpg\" alt=\"\" class=\"wp-image-13003\" srcset=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006521.jpg 1536w, https:\/\/withcode.tech\/media\/wp-content\/uploads\/2026\/02\/1000006521-768x512.jpg 768w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.09.27.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>AVIF\u306e\u5c0e\u5165\u306b\u3088\u308a\u3001\u5b9f\u969b\u306b\u3069\u306e\u7a0b\u5ea6\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6539\u5584\u304c\u5f97\u3089\u308c\u308b\u306e\u304b\u3001\u5177\u4f53\u7684\u306a\u30c7\u30fc\u30bf\u3092\u898b\u3066\u3044\u3053\u3046\uff01<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-14.48.08.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u751f\u5f92<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u306f\u3044\uff01\u3088\u308d\u3057\u304f\u304a\u9858\u3044\u3057\u307e\u3059\uff01<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<h3 class=\"wp-block-heading\">\u5b9f\u969b\u306e\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u6bd4\u8f03<\/h3>\n\n\n\n<p>\u540c\u3058\u753b\u50cf\u3092\u7570\u306a\u308b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u4fdd\u5b58\u3057\u305f\u5834\u5408\u306e\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u6bd4\u8f03\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/th><th>\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba<\/th><th>\u524a\u6e1b\u7387<\/th><th>\u753b\u8cea\u8a55\u4fa1<\/th><\/tr><\/thead><tbody><tr><td><strong>\u5143\u753b\u50cf\uff08PNG\uff09<\/strong><\/td><td>2.4 MB<\/td><td>&#8211;<\/td><td>\u2605\u2605\u2605\u2605\u2605<\/td><\/tr><tr><td><strong>JPEG\uff08\u54c1\u8cea85\uff09<\/strong><\/td><td>420 KB<\/td><td>-82%<\/td><td>\u2605\u2605\u2605\u2605\u2606<\/td><\/tr><tr><td><strong>WebP\uff08\u54c1\u8cea80\uff09<\/strong><\/td><td>280 KB<\/td><td>-88%<\/td><td>\u2605\u2605\u2605\u2605\u2606<\/td><\/tr><tr><td><strong>AVIF\uff08\u54c1\u8cea50\uff09<\/strong><\/td><td>180 KB<\/td><td>-93%<\/td><td>\u2605\u2605\u2605\u2605\u2606<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001AVIF\u306fJPEG\u3068\u6bd4\u8f03\u3057\u3066\u7d0457%\u3001WebP\u3068\u6bd4\u8f03\u3057\u3066\u7d0436%\u306e\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u524a\u6e1b\u3092\u5b9f\u73fe\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30da\u30fc\u30b8\u8aad\u307f\u8fbc\u307f\u901f\u5ea6\u3078\u306e\u5f71\u97ff<\/h3>\n\n\n\n<p>100\u679a\u306e\u753b\u50cf\u3092\u63b2\u8f09\u3059\u308bEC\u30b5\u30a4\u30c8\u3067AVIF\u3092\u5c0e\u5165\u3057\u305f\u5834\u5408\u306e\u6539\u5584\u4f8b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>JPEG\u4f7f\u7528\u6642<\/strong>: \u5408\u8a08\u8ee2\u9001\u91cf 42 MB\u3001LCP 3.8\u79d2<\/li>\n\n\n\n<li><strong>AVIF\u4f7f\u7528\u6642<\/strong>: \u5408\u8a08\u8ee2\u9001\u91cf 18 MB\u3001LCP 1.9\u79d2<\/li>\n<\/ul>\n\n\n\n<p><strong><span class=\"swl-marker mark_yellow\">\u7d0457%\u306e\u8ee2\u9001\u91cf\u524a\u6e1b\u300150%\u306eLCP\u6539\u5584\u3092\u5b9f\u73fe<\/span><\/strong>\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Core Web Vitals\u3078\u306e\u5f71\u97ff<\/h3>\n\n\n\n<p>Google\u306eCore Web Vitals\u306b\u304a\u3051\u308b\u6539\u5584\u52b9\u679c\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>LCP\uff08Largest Contentful Paint\uff09<\/strong>: 30-50%\u306e\u6539\u5584<\/li>\n\n\n\n<li><strong>FID\uff08First Input Delay\uff09<\/strong>: \u753b\u50cf\u8aad\u307f\u8fbc\u307f\u304c\u9ad8\u901f\u5316\u3059\u308b\u3053\u3068\u3067\u9593\u63a5\u7684\u306b\u6539\u5584<\/li>\n\n\n\n<li><strong>CLS\uff08Cumulative Layout Shift\uff09<\/strong>: \u5f71\u97ff\u306f\u8efd\u5fae\uff08\u9069\u5207\u306a width\/height \u5c5e\u6027\u304c\u3042\u308c\u3070\u5909\u5316\u306a\u3057\uff09<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u30e2\u30d0\u30a4\u30eb\u74b0\u5883\u3067\u306e\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u6539\u5584<\/h3>\n\n\n\n<p>4G\u56de\u7dda\uff0810Mbps\uff09\u3067\u306e\u30da\u30fc\u30b8\u8aad\u307f\u8fbc\u307f\u6642\u9593\u6bd4\u8f03\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>JPEG\u753b\u50cf\uff08\u5408\u8a0820MB\uff09<\/strong>: \u7d0416\u79d2<\/li>\n\n\n\n<li><strong>AVIF\u753b\u50cf\uff08\u5408\u8a089MB\uff09<\/strong>: \u7d047\u79d2<\/li>\n<\/ul>\n\n\n\n<p>\u30e2\u30d0\u30a4\u30eb\u74b0\u5883\u3067\u306f\u901a\u4fe1\u901f\u5ea6\u304c\u5236\u7d04\u8981\u56e0\u3068\u306a\u308b\u305f\u3081\u3001\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u524a\u6e1b\u306e\u52b9\u679c\u304c\u9855\u8457\u306b\u73fe\u308c\u307e\u3059\u3002<\/p>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-14.48.08.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u751f\u5f92<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>AVIF\u3092\u4f7f\u3046\u3060\u3051\u3067\u3001\u3053\u3093\u306a\u306b\u30da\u30fc\u30b8\u901f\u5ea6\u304c\u6539\u5584\u3055\u308c\u308b\u3093\u3067\u3059\u306d\uff01\u3059\u3054\u3044\uff01<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-right\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.12.07.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u30da\u30f3\u535a\u58eb<\/span><\/div><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p><strong>\u305d\u3046\u3058\u3083\uff01\u30da\u30fc\u30b8\u901f\u5ea6\u306e\u6539\u5584\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u3060\u3051\u3067\u306a\u304fSEO\u306b\u3082\u76f4\u7d50\u3059\u308b\u304b\u3089\u3001AVIF\u306e\u5c0e\u5165\u306f\u4eca\u3084\u5fc5\u9808\u3068\u8a00\u3048\u308b\u305e\u3044\uff01<\/strong><\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"gray\"><div class=\"c-balloon__icon -square\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2025\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-06-15-15.06.05.jpg\" alt=\"\" class=\"c-balloon__iconImg\" width=\"80px\" height=\"80px\"><span class=\"c-balloon__iconName\">\u751f\u5f92<\/span><\/div><div class=\"c-balloon__body 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Web Vitals\u306e\u5411\u4e0a<\/p>\n\n\n\n<p><strong><span class=\"swl-marker 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class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">WithCode\u3092\u4f53\u9a13\u3067\u304d\u308b\u521d\u7d1a\u30b3\u30fc\u30b9\u516c\u958b\u4e2d\uff01<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignleft size-full\"><img decoding=\"async\" width=\"600\" height=\"500\" src=\"https:\/\/withcode.tech\/media\/wp-content\/uploads\/2024\/04\/\u30d0\u30ca\u30fc_300\u00d7250_20240425.png\" alt=\"\" class=\"wp-image-2650\"\/><\/figure>\n<\/div>\n\n\n<p>\u672c\u8a18\u4e8b\u3067\u3054\u7d39\u4ecb\u3057\u305fAVIF\u753b\u50cf\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u6d3b\u7528\u65b9\u6cd5\u306f\u3001Web\u5236\u4f5c\u306e\u5b9f\u52d9\u3067\u975e\u5e38\u306b\u91cd\u8981\u306a\u30b9\u30ad\u30eb\u3067\u3059\u3002WithCode\u3067\u306f\u3001\u3053\u3046\u3057\u305f\u6700\u65b0\u6280\u8853\u3092\u542b\u3080\u5b9f\u8df5\u7684\u306aWeb\u5236\u4f5c\u30b9\u30ad\u30eb\u3092\u5b66\u3079\u308b\u74b0\u5883\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u521d\u7d1a\u30b3\u30fc\u30b9\uff08\u00a549,800\uff09\u304c\u5b8c\u5168\u7121\u6599\u306b\uff01<\/h3>\n\n\n\n<ul 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