HEIC to JPG
Convert iPhone HEIC / HEIF photos to JPG or PNG; batches are zipped automatically.
把 .heic / .heif 文件拖到这里，或点击选择
iPhone 默认照片格式（HEIC/HEIF），可一次选择多张；文件只在本地解码，不会上传
JPG 是有损压缩，质量越高越接近原图、文件越大；PNG 无损但体积明显更大，一般选 JPG 即可。
HEIC 转 JPG 的常见用法与效果边界
什么是 HEIC。HEIC/HEIF 是 iPhone 11 及以后默认的照片格式（默认设置「最高效率」时），体积比 JPG 小约一半，但 Chrome / Edge / Firefox 等主流浏览器都还无法原生解码——所以网页里直接打开会显示不出来。本页用自托管的解码库在你的浏览器里本地解码，再输出成 JPG 或 PNG。
画质会变吗。HEIC 转 JPG 属于有损格式间的转码：默认质量 92%，肉眼与原图基本无差别；调到 100% 更接近原图但文件更大。转 PNG 是无损的，文件会明显变大，一般无需。
Privacy note:解码与转换全部发生在你的浏览器里（解码器运行在独立的 Web Worker 中），全程没有任何一次网络上传，你可以在开发者工具的 Network 面板核验——只会看到页面自身的静态资源。
FAQ
HEIC/HEIF is the default photo format on iPhone 11 and later; it compresses better than JPG, but the mainstream browsers (Chrome / Edge / Firefox) still have no native decoder, so opening one directly shows nothing or complains it cannot decode. This page uses a self-hosted decoder to turn the picture apart inside your own browser, then writes it out as JPG or PNG.
No. Decoding and format conversion both finish locally in your browser (the self-hosted decoder runs in a Web Worker) without a single server request; check the developer tools Network panel and you will only see the page's own static assets.
HEIC to JPG means re-compressing into JPG: the default quality of 92 percent is, at the same size, next to indistinguishable from a JPG original by eye, and you can raise it to 100 percent to get closer (with a bigger file). Converting to PNG is lossless, but the file grows noticeably.
There is no hard cap - it depends on your machine's memory and speed, so 10 to 20 at a time works well; when several finish they are packed into a ZIP automatically (a single one downloads straight). Decoding runs one picture after another, so large photos taking longer is normal.