[{"data":1,"prerenderedAt":109},["ShallowReactive",2],{"topic-doc-image-compress-size-limit":3},{"id":4,"title":5,"body":6,"canonical":86,"description":87,"draft":88,"extension":89,"faqRefs":90,"h1":93,"meta":94,"navigation":95,"path":96,"published":95,"relatedTools":97,"robots":101,"seo":102,"slug":104,"stem":105,"summary":106,"theme":98,"updatedAt":107,"__hash__":108},"topics\u002Ftopics\u002Fimage-compress-size-limit.md","图片压缩到指定大小怎么做",{"type":7,"value":8,"toc":77},"minimark",[9,13,17,20,42,45,60,63],[10,11,12],"h2",{"id":12},"使用场景",[14,15,16],"p",{},"适合报名照、证件资料、商品详情图、宣传图和后台资料上传。很多入口不只限制文件大小，还会同时限制宽高、格式、背景或文件名。",[10,18,19],{"id":19},"推荐处理顺序",[21,22,23,27,30,33,36,39],"ol",{},[24,25,26],"li",{},"先读上传提示，确认限制的是体积、像素尺寸、格式，还是三者同时限制。",[24,28,29],{},"如果主体太小或空白太多，先裁掉无效区域，让主体占比更合理。",[24,31,32],{},"如果像素尺寸明显超过要求，先把宽高调到接近要求的范围。",[24,34,35],{},"再做压缩，第一次不要压得过低，先看能否接近上限。",[24,37,38],{},"仍超出限制时，再小幅降低体积或缩小长边。",[24,40,41],{},"如果入口只接受 JPG、PNG 或 WEBP，最后再按要求转换格式并重新检查。",[10,43,44],{"id":44},"重点看哪里",[46,47,48,51,54,57],"ul",{},[24,49,50],{},"体积达标不等于一定能上传，宽高、格式和文件名也可能导致失败。",[24,52,53],{},"人像图看五官和肩部边缘，商品图看轮廓和文字，截图看字是否糊。",[24,55,56],{},"细节图不要无限降低画质，过度压缩后很难再恢复。",[24,58,59],{},"平台明确要求格式时，先按要求导出，不要用系统不支持的格式尝试。",[10,61,62],{"id":62},"常见错误与修正",[46,64,65,68,71,74],{},[24,66,67],{},"错误：一口气降画质、改尺寸、转格式。\n修正：一次只改一个方向，方便判断哪一步有效。",[24,69,70],{},"错误：只看文件大小。\n修正：同时检查宽高、格式和文件名是否符合入口要求。",[24,72,73],{},"错误：把清晰度检查放在最后。\n修正：每次导出后都打开图片预览，确认关键内容仍能看清。",[24,75,76],{},"错误：用聊天软件压过的图片继续处理。\n修正：尽量回到相册、相机或设计软件导出的清晰原图。",{"title":78,"searchDepth":79,"depth":79,"links":80},"",3,[81,83,84,85],{"id":12,"depth":82,"text":12},2,{"id":19,"depth":82,"text":19},{"id":44,"depth":82,"text":44},{"id":62,"depth":82,"text":62},null,"上传图片有体积、像素或格式限制时，先确认失败原因，再按裁剪、调整尺寸、压缩和转格式的顺序处理。",false,"md",[91,92],"compress-image-to-limit","choose-between-jpg-png-webp","图片压缩到指定大小的方法",{},true,"\u002Ftopics\u002Fimage-compress-size-limit",[98,99,100],"compression","image-crop","format-convert","index,follow",{"title":5,"description":103,"robots":101},"图片压缩到指定大小的方法，覆盖上传体积限制、像素尺寸、JPG\u002FPNG\u002FWEBP 格式选择、清晰度检查和常见失败原因。","image-compress-size-limit","topics\u002Fimage-compress-size-limit","不要只盯着文件大小，先看入口要求的是体积、像素还是格式，再逐步处理，避免图片达标但内容看不清。","2026-06-18","kuBcBqfXdaaPYZSc7GiCYN5dCHAvK59StPL1Tl7Wp2c",1781797967645]