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Supports: ICO
An ICO file is a Windows icon container that can pack several sizes and color depths into one file, which makes it awkward to open or edit in ordinary image software. This converter pulls the icon out into a standard PNG — lossless, transparency intact, and viewable in any browser or editor. No sign-up, no watermark.
.ico onto the page or click "+ Add Files" to browse. You can queue several icons and convert them in one batch.| Property | ICO (source) | PNG (output) |
|---|---|---|
| Purpose | Windows / app icons, favicons | General-purpose raster image |
| Images per file | Multiple sizes + color depths in one container | One image, one fixed resolution |
| Max size | 256×256 px recommended | No format-imposed limit |
| Transparency | 8-bit alpha (since Windows XP) | Full alpha channel, preserved |
| Compression | BMP or PNG-encoded frames (PNG-in-ICO since Windows Vista) | Lossless |
| Browser support | All major browsers, but deprecated for page content | Universally supported |
| Best for | Bundling icon sizes for an OS | Editing, sharing, embedding anywhere |
Going the other direction to rebuild a favicon? Use PNG to ICO. If you want a flat image with no transparency, ICO to JPG flattens onto a solid background.
By default the converter exports the largest image stored in the icon, since that frame carries the most detail. A typical favicon bundles 16×16, 32×32, and 48×48 versions (and sometimes 256×256); pulling the biggest gives you the most usable PNG to edit or resize down from.
Yes. ICO supports an 8-bit alpha channel and PNG supports full alpha transparency, so transparent and semi-transparent pixels — including anti-aliased edges — are preserved exactly. The PNG will not gain a white or black box around the icon.
No — conversion is lossless, so the PNG matches the icon pixel-for-pixel, but it cannot add resolution. If your icon's largest frame is 32×32, the PNG is 32×32. In our testing, a 256×256 icon frame converted to a crisp PNG of the same dimensions, while a 16×16 favicon stayed 16×16 and only looked larger when scaled up (with the expected softening).
For inline page images, yes. MDN notes ICO should not be used for general web content, and even favicons now commonly use a PNG referenced by a <link> tag. PNG is the safer, universally supported format for anything other than a legacy favicon.ico.
Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — never shared or made public. No account or email is required.