ICO Converter
Generate multi-resolution Windows ICO files.
Generate Windows ICO Files
ICO is the Windows icon format, which can pack several resolutions into one file so the OS picks the sharpest size for each context. This tool builds a multi-resolution .ico from any image, in your browser.
Why ICO?
- Windows app and shortcut icons
- Desktop favicons (favicon.ico)
- Multiple sizes in a single file
- Crisp icons at every scale
Tip
Start from a square image at 256Ã256 or larger for the sharpest results. Select the sizes you need â 16, 32, and 48 cover most uses.
Private & Processed Locally
The ICO file is generated entirely in your browser; nothing is uploaded.
Frequently Asked Questions
Common questions about the ICO Converter.
What sizes can the ICO include?
Choose from 16, 32, 48, 64, 128, and 256px, all packed into one .ico file.
Is it private?
Yes. Everything runs in your browser using the Canvas API and your image is never uploaded to a server.
Is it free?
Yes, it is completely free with no sign-up or watermarks.