🗜️ 图片压缩Image Compressor

使用说明与常见问题How-to & FAQ

「图片压缩」是什么？What is the Image Compressor tool?

在线压缩 JPG/PNG/WebP 图片，本地处理不上传。Compress JPG/PNG/WebP images online, processed locally.

如何使用「图片压缩」？How do I use the Image Compressor tool?

在「图片压缩」中，选择或拖入文件，按需设置「质量」、「最大宽度」等选项，然后点击「压缩」按钮即可。In the Image Compressor: Choose or drop your files, set "Quality", "Max width", then click "Compress".

如何压缩图片？How to compress an image?

选择图片和输出格式（默认保持原格式），JPEG/WebP 可调整质量滑块（推荐 60–80），可选设置最大宽度，然后下载结果。Choose an image and an output format (default: keep original), adjust the quality slider for JPEG/WebP (60–80 recommended), optionally set a max width, then download.

图片会上传到服务器吗？Are my images uploaded?

不会，压缩完全在你的浏览器中通过 Canvas 完成。No. Compression happens entirely in your browser using Canvas.

PNG 怎么处理？What about PNG?

默认保持原格式：PNG 仍输出 PNG（无损重新压缩，或用「PNG 颜色」减色以大幅缩小，透明度保留）。也可在「输出格式」中选择 WebP、JPEG 或 PNG；JPEG 不支持透明，透明区域会填充白色。若无法进一步压缩，会如实提示并提供原文件下载。By default the original format is kept: a PNG stays PNG (lossless re-compression, or reduce "PNG colors" for much smaller files; transparency is preserved). You can also choose WebP, JPEG or PNG under "Output format"; JPEG has no transparency, so transparent areas become white. If a file cannot be compressed further, the tool says so and offers the original for download.

「图片压缩」免费吗？需要注册吗？Is the Image Compressor free? Do I need an account?

「图片压缩」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 Image Compressor is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.