GreatestFileTools
ICO Converter

Image to ICO

Advanced background removal, edge refinement, manual brush tools, multi-resolution .ico — fully client-side.

Drop an image or click to browse

PNG, JPG, SVG, WEBP, GIF, BMP

100% client-side — your images never leave your browser

FAQ

What image formats can I convert to ICO?
PNG, JPG/JPEG, SVG, WebP, GIF, and BMP are all supported.
Is my image uploaded to a server?
No. This tool is 100% client-side. Your images never leave your browser – all processing happens locally using the Canvas API.
What sizes are included in the ICO file?
You can choose from 16×16, 24×24, 32×32, 48×48, 64×64, 128×128, and 256×256. By default all sizes are included.
Can I remove the background before converting?
Yes. The tool includes auto background removal (flood fill + edge detection), target color removal, inner fill removal, edge feathering, and a manual brush editor.