Convert AVIF to BMP
BMP is what you reach for when a program wants raw pixels and nothing clever. It shows up in legacy Windows software, in embedded and scientific tooling, in some hardware that drives displays or printers, and in programming courses where reading an image byte by byte is the whole point. None of that software has ever heard of AVIF.
Drop your AVIF files below and download BMP in seconds. Free, unlimited and completely private: the conversion runs inside your browser, so your files never leave your device and are never uploaded to a server.
No upload. Works with your network switched off. Check it yourself, or read what actually happens to your file.
Why convert AVIF to BMP?
So this conversion is a bridge between the newest mainstream image format and one of the oldest. You will pay for it in file size: AVIF is aggressively compressed and BMP is essentially not compressed at all, so a small AVIF can easily become a BMP tens of megabytes large. That is expected, not a bug.
AVIF is based on the AV1 video codec and reaches even smaller files than WebP at the same visual quality. All modern browsers can display it, but many image editors and older tools cannot open it yet, which is the main reason people convert AVIF to an older format.
BMP stores pixels with little or no compression, which makes files huge but trivially simple to read. It is mostly seen in legacy Windows workflows, screenshots from older tools and some scientific software. Converting to a compressed format usually shrinks a BMP by 90 percent or more.
Note that BMP does not support transparency, so any transparent areas in your AVIF files will be filled with a solid background after conversion.
What this converter does to your AVIF file
The AVIF is decoded and written as an uncompressed 24 bit BMP with bottom-up row order, which is the variant legacy Windows tooling expects. 24 bit BMP has no alpha channel, so any transparency in the AVIF is flattened onto a white background before encoding. Expect the file size to grow substantially, because every pixel is stored as three raw bytes.
AVIF vs BMP at a glance
| AVIF | BMP | |
|---|---|---|
| Full name | AV1 Image File Format | Bitmap image |
| Compression | Lossy or lossless | Uncompressed |
| Transparency | Yes | No |
| Best for | Next generation web images | Legacy Windows software and raw pixel data |
What changes when you convert AVIF to BMP
| What happens | |
|---|---|
| Image quality | Unchanged from here on. BMP is lossless, so it preserves exactly the pixels decoded from the AVIF file. It cannot restore what the AVIF encoder already discarded. |
| Transparency | Lost. BMP cannot store an alpha channel, so transparent areas are filled with solid white. |
| EXIF and GPS | Removed. The conversion goes through a pixel buffer, so camera data and location are not carried into the BMP file. |
| Colour profile | Not carried across. The image is handled in sRGB, which is right for the web and wrong for colour-managed print work. |
| Animation | Not preserved. An animated AVIF produces a single still frame. |
| File size | Much larger. A 24 bit BMP costs three bytes per pixel regardless of content, so the file size is fixed by the dimensions alone. |
How to convert AVIF to BMP
- Drop one or more AVIF files into the box above, or click to browse.
- ImageConvert converts each file to BMP right on your device.
- Download a single file, or grab everything at once as a zip.
Frequently asked questions
Why is my BMP so much larger than the AVIF?
Because BMP stores pixels raw. Every pixel takes three bytes with no compression, while AVIF is one of the most efficient compressed formats available. A file growing from kilobytes to tens of megabytes is normal for this conversion.
What happens to transparent areas?
They are filled with white. The BMP written here is 24 bit and has no alpha channel, so transparency cannot be preserved and is flattened onto a solid white background.
What is an AVIF file?
AVIF is a next generation format with excellent compression, increasingly used on modern websites.
What is a BMP file?
BMP is an uncompressed Windows bitmap that keeps full pixel detail at a large file size.
Is it free to convert AVIF to BMP?
Yes. There are no limits, no watermarks and no account needed. Convert as many AVIF files as you like.
Are my files private?
Completely. Your AVIF files never leave your browser and are never uploaded to a server, so your images stay on your device.