ICO is the Windows icon file format used for application icons, desktop shortcuts, and website favicons. While ICO files contain multiple image sizes in one file, you may need to extract the images as PNG for editing, design work, or use in non-Windows contexts.
What Is an ICO File?
ICO files are container files that can hold multiple image sizes simultaneously — typically 16×16, 32×32, 48×48, and 256×256 pixels. Windows uses ICO files for application icons and favicons. Web browsers use 16×16 or 32×32 ICO files as favicon.ico for website tab icons.
How to Convert ICO to PNG Free
Upload your .ico file to imgresizr.com. Open the Convert tool and select PNG as the output. The tool extracts the largest available image from the ICO container (typically 256×256 or 512×512px) and converts it to a PNG with transparency preserved. Download your PNG file — it can be opened and edited in any image editor.
ICO Contents — What to Expect
| ICO Size | Common Use |
|---|---|
| 16×16 px | Browser tab favicon |
| 32×32 px | Desktop shortcut icon |
| 48×48 px | Windows taskbar icon |
| 256×256 px | High-DPI Windows icon |
Editing Extracted PNG Icons
- After conversion, edit the PNG to update colours, shapes, or branding
- Once edited, convert back to ICO using imgresizr.com's PNG to ICO converter
- Always work from the largest ICO size (256×256) for best quality editing
- Save the PNG with transparency — ICO icons typically have transparent backgrounds
Convert ICO files to PNG for free at imgresizr.com — extract and edit icon images without specialist software.