Convert BMP to ICO — Bitmap to Favicon
Create a multi-resolution favicon from a BMP image. Historically, ICO was closely related to BMP — both are Windows bitmap-based formats — making this a natural conversion.
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HEIC, WEBP, AVIF, TIFF, BMP, SVG, GIF, PNG, JPG, PDF, CR2, NEF, ARW, DNG — up to 50MB each, or 50 from a folder
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Modern format with excellent compression. Limited browser support.
Apple's format. Excellent quality at small sizes.
Lossless format. Large files, ideal for print/archival.
256 colors max. Best for simple graphics.
Uncompressed bitmap. Very large files.
Vector trace. Best for logos and simple graphics. Not a pixel-perfect conversion.
Same format? You might want to compress instead.
SSIM-optimized — finds the lowest file size at your chosen visual fidelity.
Need to crop first? Use the Crop tool. Want to adjust or filter? Try the Editor.
Resize tool → Live preview, percentage scaling, and dimension presets.
Tip: Use PNG or WebP for transparent output. Standalone tool →
Lossless format — files can be large
GIF is limited to 256 colors
Best for logos, icons, and line art. Photos produce stylized results.
BMP files are uncompressed and can be very large. Consider TIFF (LZW) or PNG for lossless with smaller file sizes.
Leave empty for all pages. Multi-page PDFs produce a ZIP.
Conversion complete!
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BMP vs ICO Comparison
| Feature | BMP | ICO |
|---|---|---|
| Full Name | Bitmap Image File | Icon File Format |
| Lossy Compression | ❌ | ❌ |
| Lossless Compression | ✅ | ✅ |
| Transparency | ❌ | ✅ |
| Animation | ❌ | ❌ |
| Browser Support | Most browsers (legacy format) | All browsers (favicon) |
| Color Depth | 16.7M (24-bit) | 16.7M (24/32-bit) |
| Typical Use | Windows legacy, uncompressed images | Website favicons, Windows application icons |
| Year Introduced | 1986 | 1985 |
Why Convert BMP to ICO?
BMP and ICO share heritage as Windows bitmap formats. If you have a logo or icon saved as BMP from older design software, this converter generates a modern multi-size ICO for web use.
How to Convert BMP to ICO
Upload your BMP image (square works best).
KoalaPic generates an ICO with standard favicon sizes.
Download and use as your website favicon.
Quality Note
BMP and ICO are both bitmap-based formats native to Windows. The conversion is straightforward with excellent quality retention at all favicon sizes.