BMP files are huge and rejected by most websites. Converting to AVIF fixes that: smallest files of any common format.
Drop one BMP or a hundred — they’re converted inside your browser, so even private photos are never uploaded anywhere.
BMP vs AVIF
| BMP | AVIF | |
|---|---|---|
| Compression | Uncompressed | Lossy or lossless |
| Transparency | No | Yes |
| Animation | No | Yes |
| File size | Huge — no compression at all | Often 50% smaller than JPG |
| Compatibility | Windows apps; rarely accepted online | Modern browsers (Chrome, Edge, Firefox, Safari 16+); limited in desktop apps |
| Best for | Old Windows software | The smallest possible files for modern websites |
Good to know before converting BMP to AVIF
- AVIF supports transparency, but converting won’t remove a background by itself — use Remove background for that.
- AVIF files are smaller, but double-check that the app or site you’re uploading to accepts AVIF.
- Hidden data like GPS location and camera details is left out of the converted file.
What is BMP?
BMP is an old Windows format that stores every pixel with no compression at all. Files are enormous and almost no website accepts them, so converting is nearly always a good idea.
What is AVIF?
AVIF is the newest mainstream image format, based on the AV1 video codec. It squeezes photos dramatically smaller than JPG while keeping them sharp, and supports transparency and HDR. It’s still new, so many apps and websites don’t accept it yet.
How to convert BMP to AVIF
- Drop your BMP files (or paste with Ctrl+V).
- AVIF is already selected — adjust quality if you like.
- Download one by one or all as a ZIP.
Frequently asked questions
Does converting BMP to AVIF reduce quality?
Only very slightly. AVIF is lossy or lossless; at the default quality the difference is practically invisible. Raise the quality slider for maximum fidelity.
Can I convert many BMP files at once?
Yes — drop as many as you like and download them all as one ZIP.
Are my images uploaded to a server?
No. Everything happens inside your browser on your own device. Your images are never uploaded, stored or seen by anyone — check your browser's Network tab, or turn on airplane mode after the page loads and see that it still works.
Is it really free?
Yes. No sign-up, no watermark, no daily limits and no paid “HD” downloads.
Do downloads still contain my location?
No. Every file you download is saved without hidden metadata like GPS location, camera serial number or owner name.