🖼️ HEIC 转 JPGHEIC to JPG Converter
把 iPhone 等设备拍的 HEIC 照片批量转换为 JPG：拖入多张图片一键转换，可调质量，可打包下载 ZIP，图片只在浏览器本地处理，不会上传。Convert HEIC photos from iPhones and other devices to JPG in bulk — drop in several files, adjust the quality, and download them individually or as a ZIP. Images are processed locally and never uploaded.
使用说明与常见问题How-to & FAQ
「HEIC 转 JPG」是什么？What is the HEIC to JPG Converter tool?
把 iPhone 等设备拍的 HEIC 照片批量转换为 JPG：拖入多张图片一键转换，可调质量，可打包下载 ZIP，图片只在浏览器本地处理，不会上传。Convert HEIC photos from iPhones and other devices to JPG in bulk — drop in several files, adjust the quality, and download them individually or as a ZIP. Images are processed locally and never uploaded.
如何使用「HEIC 转 JPG」？How do I use the HEIC to JPG Converter tool?
在「HEIC 转 JPG」中，选择或拖入文件，按需设置「质量」等选项，然后点击每个结果旁的「下载」按钮即可；有多个文件时也可以点「全部下载（ZIP）」一次打包下载。In the HEIC to JPG Converter: Choose or drop your files, set "Quality", then click the Download button next to each result (with several files, "Download all (ZIP)" saves them together).
HEIC 有透明背景时会怎样？质量怎么选？What if the HEIC has transparency, and which quality should I use?
iPhone 拍的 HEIC 照片没有透明通道，直接转成 JPG 即可。少数带透明通道的 HEIC（iPhone 照片没有）目前读不出透明信息：输出是不透明的，原本透明的区域会显示图片里存着的底色，转换后会在结果旁提示。质量 90 左右通常肉眼看不出差别，数值越低文件越小。HEIC photos from iPhones have no alpha channel, so they convert straight to JPG. The rare HEIC files with an alpha channel (iPhone photos have none) can't have their transparency read yet: the output is opaque and areas meant to be transparent show the colours stored underneath; the result row says so. Quality around 90 usually looks identical to the eye; lower values give smaller files.
HEIC 是什么？为什么第一次比较慢？What is HEIC, and why is the first run slow?
HEIC 是 iPhone 默认的照片格式，大多数浏览器和 Windows 软件不能直接打开。解码组件（heic2any，内含 LGPL 许可的 libheif）约 1.3 MB，第一次转换时才加载；照片的 EXIF 信息（拍摄时间、位置）不会保留。HEIC is the iPhone's default photo format, which most browsers and Windows apps cannot open. The decoder (heic2any with LGPL-licensed libheif) is about 1.3 MB and loads on first use; EXIF data such as capture time and location is not kept.
图片会上传到服务器吗？Are my images uploaded?
不会。解码和编码都用浏览器的 Canvas 在本地完成，文件不会离开你的设备；照片中的 EXIF 元数据（包括位置）会被去除。No. Decoding and encoding happen locally with the browser's Canvas, so files never leave your device; EXIF metadata (including location) is removed.
「HEIC 转 JPG」免费吗？需要注册吗？Is the HEIC to JPG Converter free? Do I need an account?
「HEIC 转 JPG」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The HEIC to JPG Converter is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.