Convert BMP to ICO
Free, instant and private — your BMP files are converted right in your browser and never uploaded to a server.
How to convert BMP to ICO
- Step 01
Add your BMP files
Drop them into the box above or click to browse. You can add several files at once.
- Step 02
Conversion starts instantly
It runs in your browser using its built-in image engine — no upload, no queue, no waiting.
- Step 03
Download your ICO files
Save each file individually or grab them all at once. Done.
Why convert BMP to ICO?
Got a logo or graphic saved as BMP and need a favicon? This converts it straight to a multi-size .ico (16, 32, 48 px) — the quick path from an uncompressed Windows bitmap to the icon browsers expect at /favicon.ico.
BMP vs ICO at a glance
BMP is Windows' raw bitmap format — pixel data stored uncompressed, which makes files enormous. ICO is the Windows icon container — bundles several sizes in one file, still the format browsers expect for favicon.ico.
| Property | BMP | ICO |
|---|---|---|
| Extension | .bmp, .dib | .ico |
| Full name | Bitmap Image File | Windows Icon |
| First released | 1990 | 1985 |
| Developed by | Microsoft | Microsoft |
| Compression | Lossless | Lossless |
| Transparency | No | Yes |
| Animation | No | No |
| Best for | raw uncompressed bitmaps from Windows apps | favicons and Windows application icons |
BMP to ICO — frequently asked questions
Is this BMP to ICO converter really free?
Yes — completely free, with no sign-up, no watermarks and no daily limits.
Are my BMP files uploaded to a server?
No. The conversion happens entirely on your device using your browser's built-in image engine. Your BMP files never leave your computer or phone — which is also why the conversion is nearly instant.
What sizes will the ICO contain?
16×16, 32×32 and 48×48 — the three favicon standards — all in one file, so each context picks the sharpest.
Does my BMP need to be square?
Ideally yes. If it isn't, we centre it on a square canvas and keep the aspect ratio; the surrounding area stays transparent.
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Need the reverse? Convert ICO to BMPExplore the ICO converter