BMP to AVIF Details
This page is a single-purpose converter: it rewrites BMP files as AVIF. Drop a file in, run the conversion, take the download.
BMP stores pixels as they are, with no practical compression standing in the way. AVIF is the still-image half of the AV1 codec and holds detail well even at low bitrates.
The workflow
The order below follows the page itself, and no step asks you to sign up or confirm anything.
- Drag your BMP files onto the upload area, or click it and pick them from the file dialog.
- The queue takes up to 20 files at once, and anything added by mistake can be removed from the list.
- Use the convert button on a single row, or the batch button to run the whole queue at once.
- Type a different name in the queue field if you want one, and the file lands with that name plus the AVIF extension.
- Save the finished AVIF file with the download link, then clear the queue and start the next batch.
Limits and processing behaviour
A few details that make the decision easier:
- Accepted input: BMP (bmp), up to 24 MB per file.
- The result is written as AVIF and encoded at quality 60, which is why the file shrinks so much.
- The queue carries 20 files at a time, and each file travels in its own request.
- BMP files have no transparency to begin with, so the AVIF result is opaque; an alpha channel is never invented.
- BMP is lossless while AVIF is encoded with loss, so hard lines and small text can soften slightly at the edges.
- Do not count on metadata surviving: whether EXIF and ICC data travel depends on the engine handling the file, so keep anything critical elsewhere.
Is this the right tool
This conversion earns its place when an existing BMP file has to land somewhere that asks for AVIF. Hero images, high-resolution photography and pages that pay attention to mobile data cost benefit most. It usually lands smaller than WebP at matching quality, but encoding is slower and old software support is thin. BMP stores pixels as they are, with no practical compression standing in the way.
AVIF gives you the smallest file when page speed is the priority. If the file has to open in older software, WebP or JPG output is the safer call.
Practical notes
- For larger sets, work in groups of 20; the queue survives as long as you keep the tab open.
- Renaming outputs in the queue keeps your downloads folder readable once several AVIF files land there.
- AVIF is encoded with loss, so converting the same file repeatedly costs quality. Keep the original.
- Test one file, judge the result, then send the rest of the BMP files through in a batch.
Privacy and data handling
The conversion happens on the server: the file arrives with the request, gets processed, and leaves in the same response. Nothing is archived, the contents are never inspected, and the only thing recorded afterwards is a counter of how often the tool ran.