What image formats can I convert to ICO?

The tool supports PNG, JPG/JPEG, WebP, GIF, BMP, and SVG files. For the best ICO quality, use PNG with a transparent background as your source.

Which source format produces the best ICO quality?

PNG with a transparent background gives the sharpest results. Use a source image of at least 512×512 pixels so all ICO sizes (down to 16×16) remain crisp when downscaled.

What ICO sizes does the tool generate?

The generated ICO file contains 16×16, 32×32, 48×48, 64×64, 128×128, and 256×256 pixel sizes packed into a single file.

Is the conversion private? Are files uploaded to a server?

All conversion happens entirely in your browser using the Canvas API. No files are uploaded to any server at any point.

Image to ICO

Convert any image format to ICO icons

Drag and drop your file here

or click to browse files • Max 50MB

Tips:

•Use PNG source files with transparency — the alpha channel is preserved in the ICO output
•A larger source image (512×512 or higher) produces sharper icons at every ICO size
•ICO files bundle multiple sizes (16×16 to 256×256) so Windows and browsers pick the best fit automatically
•For favicons, add <link rel="icon" href="favicon.ico"> to your HTML <head>

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