What happens when you convert BMP to ICO
- Both formats are lossless, so every pixel is kept exactly.
- Choose the icon sizes (16 to 256 px); they're all packed into one .ico file, ready to use as a favicon.
BMP vs ICO
| Feature | BMP | ICO |
|---|---|---|
| Compression | None (uncompressed) | Lossless |
| Transparency | No | Yes |
| Animation | No | No |
| Colors | 16.7M | 16.7M |
| Best for | Legacy Windows software | Favicons, app icons |
How to convert BMP to ICO
- Drop your BMP files on the box above, or click it to choose files. You can add many at once.
- Adjust the options if you want. The defaults work well for most files.
- Click Download for each ICO file, or "Download all" to get a ZIP.
Frequently asked questions
Is it safe to convert my files here?
Yes. Conversion happens entirely in your browser. Your files are never uploaded to a server, so nobody else can see them.
Is it free? Are there limits?
It's completely free, with no sign-up, watermarks or daily limits. The only limit is your device's memory for very large files.
Can I convert many BMP files at once?
Yes. Drop as many files as you like; they're converted one after another and you can download them all as a ZIP.
Will converting BMP to ICO reduce quality?
No. Both formats are lossless, so every pixel is kept.