ICO to PNG: How to Extract Windows Icons and Favicons
ICO files are icon containers, not images. Here's how they work, how to pull the full-size PNG out of one, and why browser-local extraction beats online converters.
An .ico file isn't a single image — it's a container holding the same icon at many sizes (16, 32, 48, 256px…). Windows uses it for executables and shortcuts, and it's the classic favicon format. When you need the actual image inside, you want the largest, cleanest frame extracted as PNG.
Why direct extraction beats screenshots
Screenshotting an icon gives you whatever size happened to be on screen, often with anti-aliasing artifacts and the wrong background. Proper extraction pulls the embedded 256px (or largest) frame with its original transparency intact.
Extract locally in one step
Open the ICO to PNG tool, drop the .ico file, and the largest embedded icon is decoded by your browser and offered as a full-size PNG. Nothing uploads — convenient for proprietary app icons you shouldn't hand to third-party servers.
Going the other way — turning a PNG into a favicon set for your own site — usually means exporting multiple sizes; the Resize Image tool handles each size from the same source in seconds.