ICO to PNG

How it works

ICO isn't really a single image — it's a small container that bundles several sizes of the same icon together (16×16, 32×32, 48×48 and so on) so Windows and browsers can pick whichever fits. This tool converts an ICO file to PNG directly inside your browser tab, automatically selecting the largest embedded size so you get the most detail.

When you drop a file, Moyang reads its container header to confirm it's really an ICO, then parses the list of embedded images to find the biggest one. Icons store their image data either as a plain PNG or as a raw Windows bitmap — Moyang handles both, reconstructing a standalone bitmap when needed before handing it off to your browser's own image decoder in a background Web Worker. Your original file is never modified, and nothing ever leaves your device.

Because everything runs locally, there's no 10-conversions-a-day limit, no 100MB cap, and no processing queue — the kind of restrictions server-based converters impose to control their hosting bill. Convert one file or fifty; once a batch is done, download every result at once as a single ZIP.

Limitations

Only the largest embedded size is converted — an ICO with five sizes still produces one PNG, the biggest one, not five. Very old, low-color-depth icons (1-bit or 4-bit palettes) are supported but rarely carry much visual detail to begin with, so don't expect a crisp result from a decades-old 16-color icon.

FAQ

Is this ICO to PNG converter really free?

Yes — completely free, with no file size limits, no daily quota, and no account required. All conversion happens in your browser, so there's no server cost to recoup.

An ICO file can contain several icon sizes — which one do I get?

This tool automatically picks the largest size stored inside the ICO container and converts that one to PNG, since it carries the most detail. If you need every embedded size, you'll need a tool that extracts each one separately.

Why would I need to convert an ICO back to PNG?

ICO is a container format almost nothing outside Windows and web favicons uses directly — image editors, design tools and most apps expect PNG. Converting lets you open, edit or reuse an icon's artwork anywhere PNG is accepted.

Is transparency preserved?

Yes. Modern ICO files typically embed a full alpha channel (or, for older icons, a plain transparency mask), and either way it carries through correctly to the PNG output.