🧹 去除 WebP 背景Remove WebP Background
从四个角按左上角像素的颜色洪水填充（4 连通），把相连的背景变透明；容差 0 只去除完全相同的颜色。本地处理。Flood-fill (4-connected) from the four corners using the top-left pixel colour, making the connected background transparent; tolerance 0 removes only the exact colour. Processed locally.
使用说明与常见问题How-to & FAQ
「去除 WebP 背景」是什么？What is the Remove WebP Background tool?
从四个角按左上角像素的颜色洪水填充（4 连通），把相连的背景变透明；容差 0 只去除完全相同的颜色。本地处理。Flood-fill (4-connected) from the four corners using the top-left pixel colour, making the connected background transparent; tolerance 0 removes only the exact colour. Processed locally.
如何使用「去除 WebP 背景」？How do I use the Remove WebP Background tool?
在「去除 WebP 背景」中，选择或拖入文件，按需设置「容差」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 Remove WebP Background: Choose or drop your files, set "Tolerance", 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：读入图片后从四个角向内查找与角落颜色相近的连续区域并设为透明，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, flood-fills inward from the corners and makes the connected region close to the corner colour transparent, 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？Uploaded?
不会，图片只在浏览器本地处理。No. Processed locally in your browser.
会去掉哪些像素？Which pixels are removed?
从四个角出发、与左上角颜色相近（RGB 距离 ≤ 容差 × 255 ÷ 100）且相互连通的像素。被主体包围、与边缘不相连的同色区域会保留。容差 0 只去除完全相同的颜色。Pixels connected to the corners whose colour is close to the top-left pixel (RGB distance at most tolerance × 255 ÷ 100). Areas of the same colour enclosed by the subject and not connected to the edge are kept. Tolerance 0 removes only the exact colour.
有哪些选项可以调整？What options can I adjust?
「去除 WebP 背景」的设置：「容差」默认 25，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 Remove WebP Background — "Tolerance" default 25, range 0–100; files: common image formats (including HEIC, HEIF, AVIF, WEBP, BMP, JFIF). The result always uses the current settings.
「去除 WebP 背景」免费吗？需要注册吗？Is the Remove WebP Background free? Do I need an account?
「去除 WebP 背景」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 Remove WebP Background is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.