Compress ICO images online
Reduce ICO favicon and icon file size. Free, private, and processed directly in your browser.
Drop your ICO images here
or choose up to 30 ICO images from your device
Maximum file size: 20MB per image
Your images stay private
Images are processed directly in your browser and are never uploaded to our servers.
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How to compress an ICO image
- 1
Upload your ICO file
- 2
Choose the quality balance
- 3
Compress the icon
- 4
Download the optimized copy
Why compress ICO images?
- Lighter favicon downloads
- Faster icon requests
- Smaller app and desktop icon files
- Easy browser-based processing
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How ICO compression works
ICO files are designed for small icons and may contain several embedded dimensions. Reducing the image data can make favicon requests lighter.
Check the smallest favicon sizes after compression because tiny icons need clear edges and readable shapes.
Frequently asked questions
- Yes. Compress ICO files for free with no signup or watermark.
- No. Processing happens directly in your browser.
- ICO is an icon container commonly used for Windows icons and website favicons.
- Yes. Favicons can contain several sizes, so verify the result in the target browser or operating system.