How to Use
- Drop a website logo, such as a transparent 512×512 PNG.
- Choose the favicon sizes to include. The default set creates 16, 32, 48, and 256 pixel frames.
- Keep "Center crop to square" enabled if the source image is not square.
- Click "Convert to ICO" and the browser generates the
.icofile locally.
Core Features
- PNG/JPG/WebP to ICO: Turn common image formats into a website favicon file.
- Multi-Size Favicon ICO: Include 16×16, 32×32, 48×48, 64×64, 128×128, and 256×256 frames in one ICO file.
- Client-Side Canvas Conversion: Your logo is read, cropped, and resized in the browser without uploading the file.
- Drag, Drop, or Use the Sample: Add your own image or start with the built-in favicon example.
- Square Crop Option: Center-crop non-square images for a cleaner favicon.
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Calculation Logic
The tool draws your source image to Canvas, creates PNG image data for each selected size, then packages those frames into a Microsoft Icon format .ico binary.
Modern browsers and mainstream desktop systems generally support PNG-encoded frames inside ICO files, preserving transparency while keeping favicon files compact.
FAQ
What is an ICO file used for?
Its most common use is favicon.ico for websites. It can also work for desktop icon use cases that accept standard ICO files.
What size should my original image be?
Use at least 256×256 pixels, preferably a transparent PNG. The tool resizes it to your selected favicon sizes.
Are my uploaded images kept on your servers?
No. Reading, resizing, and ICO packaging all run locally in your browser.
Can this create multi-size ICO files?
Yes. Select multiple sizes and the tool writes them into one ICO file.