BMP to AVIF converter
A free BMP to AVIF converter for Windows Bitmap files. Browser-based pairs here usually run in this tab, with no file upload.
Drop your BMP files here
or browse your device · paste with Ctrl+V
Accepts .bmp, .dib files. You can queue several files; each is processed one after another on your own device.
Your files never leave this device — there is no upload and no server to delete them from.
- 01
Add your BMP files
Drop them onto the box above or click to browse. They are read straight from disk — nothing is sent anywhere.
- 02
Check the settings
AVIF is already selected. Open the gear icon on any row if you want to change quality, dimensions or codec before converting.
- 03
Download your AVIF
Press convert and wait for the row to finish. Convert several files and you can take them all as a single ZIP.
BMP
Windows BitmapWindows' uncompressed raster format: every pixel stored literally, which makes it simple to read and enormous on disk. Almost always worth converting to PNG, which is lossless too but far smaller.
- Developed by
- Microsoft
- Released
- 1990
- Extension
- .bmp, .dib
- MIME type
- image/bmp
- Compression
- Uncompressed
AVIF
AV1 Image File FormatStill images encoded with the AV1 codec, and the current efficiency champion — often half the size of a JPEG at matching quality, with HDR and wide-gamut colour. Encoding is slow, which is the trade you make.
- Developed by
- Alliance for Open Media
- Released
- 2019
- Extension
- .avif
- MIME type
- image/avif
- Compression
- Lossy or lossless
- Specification
- Open
- BMP is lossless, and AVIF can be either. At typical quality settings this lands on lossy and trades size for some quality loss. Keep BMP as a source if you may need a higher-detail version later.
Questions about converting BMP to AVIF
Is this BMP to AVIF converter free?
Yes. Converting BMP to AVIF here is free, with no account, no watermark and no daily quota. The work runs on your own device, so there is no server cost to pass on to you.
Is my BMP file uploaded anywhere?
For browser-based pairs, your file is read locally and converted by Squoosh in this tab. No file payload is uploaded; you may still see analytics and engine downloads in network logs.
Is there a file-size limit for BMP to AVIF?
There is no imposed upload cap when it runs in-browser, but each conversion still depends on your device and browser memory. Large videos are the first practical limit, then memory-heavy documents or images.
Does converting BMP to AVIF lose quality?
It depends on your selected settings and codec path. Many engines can write either lossy or lossless output for AVIF, so you can usually increase quality if this file is your final version.
Can I convert several BMP files to AVIF at once?
Yes. Drop in several files and each gets its own row; they are processed one after another on your device. You can download them one by one or as one ZIP.
Does BMP to AVIF work on a phone, Mac or Chromebook?
Most modern browsers on Windows, macOS, Linux, ChromeOS, Android and iOS work. Very large videos are often more reliable on desktop or a browser with more memory.
Why do some conversions take longer on first run?
The conversion engine has to download first. Small codec bundles are fast, while ffmpeg is commonly 12–30 MB; later conversions of similar type use the cached engine.
I converted a file and the output is blank or unusable. What should I check?
Start over with default settings, then change one option at a time (quality, bitrate, page size, or codec) to isolate what changed behavior. If it keeps failing, retry with a smaller file and confirm the source format matches the pair.
Convert other formats to AVIF
16 formats can become AVIF here.
Convert BMP to other formats
A BMP file can become any of these.
AVIF to BMP
The reverse conversion
JPG to AVIF
PDF to AVIF
PNG to AVIF
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