Convert BMP to ICO Online
BMP is a common format worth converting when a tool like this doesn’t accept it directly. Converting to ICO happens instantly, right in your browser. The output is a single-size icon file — ideal for favicons or small app icons, not a general photo format.
Why Convert BMP to ICO
BMP files are common from older Windows software and some screenshot tools, but they’re rarely the right format to share or publish. Converting to ICO gets you a properly formatted icon file for a website or app — done instantly, for free, without installing anything or creating an account.
BMP vs ICO: Technical Specs
Quick verdict: Pick BMP for legacy Windows applications, ICO for favicons, Windows application icons.
.bmp.icoimage/bmpimage/x-iconHow It Works & Privacy Guarantee
Converting your BMP file to ICO happens in three steps, entirely on your device: your browser reads the BMP file into memory, decodes and re-encodes it as ICO using built-in browser technology (Canvas and WebAssembly), and hands you the finished file as a direct download.
At no point does the file get sent to a server. There’s no upload step to intercept, no account that could be breached, and nothing stored after you close the tab — the conversion simply couldn’t leak your file even if something went wrong, because it never left your browser in the first place.
BMP to ICO FAQ
What should I know about converting to ICO?
The output is a single-size icon file — ideal for favicons or small app icons, not a general photo format.
Will converting BMP to ICO reduce quality?
We decode the original BMP data and re-encode it at high quality, so any difference is minimal to the eye for normal use.
How do I convert BMP to ICO for free?
Drop your BMP file into the box above and press Convert — the ICO download is ready in seconds, with no account, no watermark, and no limit on how many files you convert.
Can I convert multiple BMP files to ICO at once?
Yes — drop in as many files as you need, convert them all in one go, and download everything together as a single ZIP instead of clicking download on each file individually.