Will the AVIF file have transparency?

Not automatically — BMP images carry no alpha channel, so the converted file is fully opaque. The difference is that AVIF can store transparency, so after converting you can open the image in an editor and erase the background without another format change.

Will converting BMP to AVIF lose quality?

AVIF uses lossy compression, so some pixel data is discarded — that is exactly where the size savings come from. At the default quality setting the loss is invisible for most images. Keep the BMP original as your master copy and re-export whenever you need a different balance of size and quality.

Do I need a particular browser to convert to AVIF?

Yes — the encoding runs in your browser, and in-browser AVIF encoding is currently available in Chromium-based browsers such as Chrome, Edge, Brave, and Opera. If your browser cannot encode AVIF, FileMorf reports an error instead of silently producing a different format. The finished files display in Chrome, Firefox, Edge, and Safari 16 or later.

How much smaller will the AVIF file be?

Reductions are dramatic when going from raw uncompressed pixels to the most efficient mainstream codec available.

Next-Gen Image Tool

Convert BMP to AVIF

Convert BMP bitmaps to AVIF for the smallest possible modern web files.

This conversion runs in this browser tab. The selected file is not uploaded for processing.

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BMP to AVIF, step by step.

These steps describe the BMP input and the AVIF export for this exact route.

Upload BMP Files

Drag and drop your BMP images or click to browse. You can queue several files at once.

Adjust Quality

Use the quality slider to balance file size against fidelity. The default of 75% suits most images.

Download AVIF

Save the converted file right away. Multiple images are bundled into a ZIP for one-click download.

What to expect

What matters for AVIF output.

Review the behavior this BMP to AVIF tool is designed to preserve, expose, or simplify.

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All processing happens in your browser. Your files never leave your device.

Best-in-Class Compression

AVIF's AV1-based encoding produces the smallest files of any mainstream image format, with transparency support.

Batch Processing

Convert multiple files at once. Download as a convenient ZIP file.

Questions about BMP and AVIF.

Check the format behavior, limitations, and follow-up options before processing a real file.

AVIF offers the strongest compression of any mainstream format, so converting uncompressed BMP yields enormous savings — often dramatic for photographic content — while modern browsers display the result natively.

Related routes

Continue from AVIF.

Choose another format only when it matches the next job.

AVIF to BMP BMP to JPG JPG to AVIF Browse all conversions

Next step

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