🅰️ 填充 WebP AlphaFill WebP Alpha Channel

使用说明与常见问题How-to & FAQ

「填充 WebP Alpha」是什么？What is the Fill WebP Alpha Channel tool?

把所有像素的 Alpha 设为指定不透明度。本地处理。可设置「不透明度」。Set every pixel alpha to a chosen opacity. Processed locally. Settings: Opacity.

如何使用「填充 WebP Alpha」？How do I use the Fill WebP Alpha Channel tool?

在「填充 WebP Alpha」中，选择或拖入文件，按需设置「不透明度」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 Fill WebP Alpha Channel: Choose or drop your files, set "Opacity", then click the Download button next to each result (with several files, "Download all (ZIP)" saves them together).

全透明像素也会被设置吗？Are fully transparent pixels changed too?

会。所有像素的 Alpha 都设为所选不透明度（20% → 51）。原本全透明的像素会显示文件里存储的颜色；很多编码器把全透明像素的颜色存为黑色，所以那部分通常会变成半透明黑色。Yes. Every pixel's alpha is set to the chosen opacity (20% gives 51). Pixels that were fully transparent show the colour stored in the file; many encoders store black there, so those areas usually become semi-transparent black.

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

本页是 WebP 系列工具之一：把每个像素（包括原本全透明的像素）的 Alpha 都设成你填的百分比，再以无损 WebP 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 sets the alpha of every pixel (including pixels that were fully transparent) to the percentage you enter and exports lossless WebP, so it fits straight into a WebP workflow. For PNG or JPG output, use the matching general image tool.

会上传吗？Uploaded?

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

有哪些选项可以调整？What options can I adjust?

「填充 WebP Alpha」的设置：「不透明度」默认 100，范围 0–100；可选文件：常见图片格式（含 HEIC、HEIF、AVIF、WEBP、BMP、JFIF）。每次生成结果都按当前设置处理。Settings in the Fill WebP Alpha Channel — "Opacity" default 100, range 0–100; files: common image formats (including HEIC, HEIF, AVIF, WEBP, BMP, JFIF). The result always uses the current settings.

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

「填充 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 Fill 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.