Turn ICO icons into BMP bitmaps - 32-bit with transparency, classic 24-bit or 8-bit for old software. Need a smaller file? ICO to PNG is lossless too.
Going the other way? BMP to ICO makes icons from bitmaps.
Inside most ICO files the small sizes are already stored as bitmaps.
32-bit keeps the transparency of the icon. Paint, Photoshop, GIMP and browsers show it.
24-bit is the classic BMP that every program since Windows 3 reads - pick it for old software, game mods or embedded displays. 8-bit makes a small 256-colour file.
| ICO | BMP | |
|---|---|---|
| Sizes per file | Several | One |
| Transparency | Yes | 32-bit only |
| Compression | None or PNG | None |
| Opens in | Windows, browsers as favicon | Paint, editors, old software |
| Best for | Icons and favicons | Legacy programs, raw pixel data |
Want to inspect the result? The BMP Analyzer shows every header field.
Drop your ICO into the box, pick 32-bit, 24-bit or 8-bit, and press Convert to BMP.
With 32-bit (the default), yes. 24-bit and 8-bit BMPs have no transparency, so transparent areas get the background colour you choose.
24-bit. Every program that reads BMP understands it. 32-bit transparency is ignored by some older programs.
Yes. Click the other thumbnails or press All. Each size becomes its own BMP, named like icon-32x32.bmp.
No. Your browser converts the icon. Only a pasted link from a site that blocks direct downloads goes through our server, and it is not stored.
Use BMP to ICO. It builds every Windows icon size from one bitmap.
