🔰 ICO 转 PNG（提取图标所有尺寸）ICO to PNG Converter
把 Windows 图标 ICO（以及 CUR 光标）转换为 PNG：自动解析文件里的每个尺寸（16–256 像素），保留透明背景，可全部提取或只取最大的一张，支持批量和打包 ZIP，全部在浏览器本地完成。Convert Windows ICO icons (and CUR cursors) to PNG. Every size inside the file (16–256 px) is decoded with its transparency kept; extract them all or just the largest, in bulk with ZIP download — everything runs locally in your browser.
使用说明与常见问题How-to & FAQ
「ICO 转 PNG（提取图标所有尺寸）」是什么？What is the ICO to PNG Converter tool?
把 Windows 图标 ICO（以及 CUR 光标）转换为 PNG：自动解析文件里的每个尺寸（16–256 像素），保留透明背景，可全部提取或只取最大的一张，支持批量和打包 ZIP，全部在浏览器本地完成。Convert Windows ICO icons (and CUR cursors) to PNG. Every size inside the file (16–256 px) is decoded with its transparency kept; extract them all or just the largest, in bulk with ZIP download — everything runs locally in your browser.
如何使用「ICO 转 PNG（提取图标所有尺寸）」？How do I use the ICO to PNG Converter tool?
在「ICO 转 PNG（提取图标所有尺寸）」中，选择或拖入文件，按需设置「提取」等选项，然后点击「全部下载（ZIP）」按钮即可。In the ICO to PNG Converter: Choose or drop your files, set "Extract", then click "Download all (ZIP)".
一个 ICO 文件里为什么有好几张图？Why does one ICO contain several images?
ICO 是图标容器，通常同时存放 16、32、48、256 像素等多个尺寸（有时还有不同色深），让 Windows 在标题栏、任务栏、桌面和资源管理器里挑最合适的一张。选择“提取全部尺寸”会把每张都转成单独的 PNG，文件名带尺寸，如 app-48x48.png。ICO is an icon container that usually holds several sizes — 16, 32, 48, 256 px and sometimes several colour depths — so Windows can pick the best one for the title bar, taskbar, desktop and Explorer. Every size gives each one its own PNG, named with its size, such as app-48x48.png.
支持哪些 ICO？透明会保留吗？Which ICOs are supported, and is transparency kept?
支持 PNG 压缩的图标（Vista 以后常见的 256 像素图）以及 1、4、8、16、24、32 位 BMP 图标，包括 AND 透明遮罩和 32 位 Alpha 通道，透明区域在 PNG 里保持透明。CUR 光标同样可以提取，热点信息不会保留。PNG-compressed entries (the 256 px images common since Vista) and 1-, 4-, 8-, 16-, 24- and 32-bit BMP entries are supported, including the AND transparency mask and 32-bit alpha; transparent areas stay transparent in the PNG. CUR cursors work too, though the hotspot isn't kept.
“只取最大的一张”怎么选？How is 'Largest only' chosen?
按像素面积选最大的尺寸；同一尺寸有多种色深时取色深最高的那张。想用作网站图标或在设计软件里继续编辑时，通常取最大的那张最清晰。The size with the most pixels is chosen; if that size appears at several colour depths, the deepest one is taken. For website icons or further editing, the largest image is usually the sharpest.
想反过来把 PNG 做成 ICO 怎么办？How do I turn a PNG into an ICO?
请使用本站的 ICO 图标转换器：把 PNG、JPG 或 SVG 生成包含多个尺寸的 ICO / favicon。本工具只负责把已有图标拆成 PNG。Use the site's ICO Converter, which builds a multi-size ICO / favicon from PNG, JPG or SVG. This tool only splits existing icons into PNGs.
文件会上传吗？Are files uploaded?
不会。图标在你的浏览器里解析和编码为 PNG，文件不会离开你的设备。No. Icons are parsed and encoded to PNG in your browser; files never leave your device.
「ICO 转 PNG（提取图标所有尺寸）」免费吗？需要注册吗？Is the ICO to PNG Converter free? Do I need an account?
「ICO 转 PNG（提取图标所有尺寸）」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 ICO to PNG 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.