How to Open and Create .ICO Icon Files
Updated: February 2026
The .ICO file format is Windows' native icon format. ICO files contain one or more small images at multiple sizes and color depths, used for application icons, desktop shortcuts, and website favicons.
Opening ICO Files
Windows displays ICO files automatically as icons. To view as images, right-click and open with Paint or any image viewer. Web browsers also display ICO favicons.
Free Tools to Create ICO Files
- GIMP: Export images as ICO format with multiple sizes
- IcoFX: Dedicated free icon editor for Windows
- RealWorld Paint: Free icon and cursor editor
- Online ICO converters: Convert PNG/JPG to ICO at Favicon.io or ConvertICO
- Paint.NET with plugin: ICO plugin enables icon creation
Creating Multi-Size Icons
Professional ICO files include multiple resolutions (16×16, 32×32, 48×48, 256×256 pixels) in one file. This ensures sharp display at any size. GIMP and dedicated icon editors create proper multi-size ICO files.
Using ICO for Favicons
Websites use ICO files as favicons (browser tab icons). Modern sites prefer PNG, but ICO remains compatible with all browsers. Include sizes 16×16 and 32×32 for best favicon support.
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Frequently Asked Questions about How to Open and Create .ICO Icon Files
Is How to Open and Create .ICO Icon Files suitable for beginners?
Yes, absolutely. Our guide to How to Open and Create .ICO Icon Files explains all basics clearly.
How much does How to Open and Create .ICO Icon Files cost?
Costs vary depending on the provider. A comparison is always worth it.
Where can I find more information?
Right here in our expert area for file-extensions-guide.