Convert AVIF to BMP
Drop AVIF files and download them as BMP. AVIF can hold transparency and BMP cannot, so transparent areas are filled with the background colour you choose (white by default). Conversion runs on your device, so large batches finish in seconds and nothing is uploaded.
How to use the AVIF to BMP
- Drop or paste your AVIF files (up to 200).
- No settings needed: the output is lossless.
- Click Convert to BMP.
- Download each file or all as a ZIP.
Why convert AVIF to BMP?
AVIF is based on the AV1 video codec and typically beats WebP by another 20–30% at the same quality, with transparency and HDR support. Browser support is universal since 2024, but many image editors, email clients and upload forms do not accept it yet.
BMP is the uncompressed Windows bitmap format. Files are very large (3 bytes per pixel) but trivially simple, which is why some legacy software, embedded systems and wallpaper settings still require it.
What changes in the conversion
BMP is lossless, so nothing further is lost in the conversion, but the AVIF compression already applied cannot be undone; the BMP file will be much larger without being sharper. AVIF can hold transparency and BMP cannot, so transparent areas are filled with the background colour you choose (white by default). Animated AVIF files are converted to a still image of the first frame.
AVIF vs BMP at a glance
| AVIF | BMP | |
|---|---|---|
| Compression | lossy | lossless |
| Transparency | yes | no |
| Animation | yes | no |
| Typical size | smallest of all | very large |
| Opens in | modern browsers; limited desktop software | Windows and most editors |
How it works on your device
Your browser decodes the AVIF file into raw pixels, draws them onto a canvas and asks its built-in encoder to write BMP. Nothing is sent to a server, which is why there is no file-size limit beyond your device's memory and no queue.
Need a different pair? See all image converters or use the general converter.
Frequently asked questions
Does converting AVIF to BMP lose quality?
BMP is lossless, so nothing further is lost in the conversion, but the AVIF compression already applied cannot be undone; the BMP file will be much larger without being sharper..
Is there a limit on file size or number of files?
Up to 200 files per batch and no fixed size limit; processing happens in your browser.
Are my images uploaded?
No. The conversion runs on your device and works offline after the page loads.
What happens to transparent areas?
They are filled with the background colour you pick (white by default), because BMP has no transparency.
Privacy
This tool runs entirely inside your browser using WebAssembly and the Canvas/File APIs. Your files are never uploaded to ToolFlint or any third party; you can verify this in your browser's network tab or by switching to airplane mode after the page loads. Read how we process files.
Last updated 2026-09-23.