🅰️ 提取 WebP AlphaExtract WebP Alpha Channel

把透明度画成灰度遮罩 WebP。本地处理。Render opacity as a grayscale mask WebP. Processed locally.

点击选择或拖放图片（可多选）Click or drop images here (multiple allowed)

Alpha → 灰度Alpha → grayscale

使用说明与常见问题How-to & FAQ

「提取 WebP Alpha」是什么？What is the Extract WebP Alpha Channel tool?

把透明度画成灰度遮罩 WebP。本地处理。Render opacity as a grayscale mask WebP. Processed locally.

如何使用「提取 WebP Alpha」？How do I use the Extract WebP Alpha Channel tool?

在「提取 WebP Alpha」中，选择或拖入文件，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 Extract WebP Alpha Channel: Choose or drop your files, then click the Download button next to each result (with several files, "Download all (ZIP)" saves them together).

为什么只导出 WebP？Why does it only export WebP?

本页是 WebP 系列工具之一：读入图片后把 Alpha 通道提取成灰度遮罩（不透明为白、透明为黑），再按 WebP 格式导出，便于在 WebP 工作流里直接使用。需要 PNG 或 JPG 结果时，请用对应的通用图片工具。This page is one of the WebP tools: it loads the image, turns the alpha channel into a grayscale mask (opaque is white, transparent black), and exports the result as WebP so it fits straight into a WebP workflow. For PNG or JPG output, use the matching general image tool.

会上传吗？Is anything uploaded?

不会，图片只在浏览器本地处理。No. Images are processed locally in your browser.

「提取 WebP Alpha」免费吗？需要注册吗？Is the Extract WebP Alpha Channel free? Do I need an account?

「提取 WebP Alpha」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 Extract WebP Alpha Channel is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.