BMP to AVIF Converter
Convert BMP to AVIF free — no upload, no signup
To convert BMP to AVIF, drop your BMP images into the box below, click Convert, then Download. Fylo does the work inside your browser, so nothing is uploaded and there's no signup or watermark. It gives maximum compression for raw bitmap images.
Drop images here
or tap to browse · paste with Ctrl+V · add many at once
Your files never leave your device
Higher keeps more detail; lower makes smaller files.
Advanced
Leave empty to keep the original size.
How to convert BMP to AVIF
Add your BMP files
Drag and drop BMP files into the box, tap to choose them, or paste with Ctrl+V. You can add many at once.
Check the quality
Leave AVIF quality at the default 60 or adjust the slider — higher keeps more detail, lower makes smaller files.
Convert and download
Click Convert, then download each AVIF or get them all in one ZIP.
Why convert BMP to AVIF?
If you're archiving or publishing large numbers of BMP photos and storage or bandwidth is the concern, AVIF produces the smallest files of any widely supported format.
Does converting BMP to AVIF affect quality or size?
AVIF can shrink a BMP photo by 95% or more at quality 60 with little visible change. Because it's lossy, keep the original BMP or a PNG copy if you may need pixel-exact data later.
What's the difference between BMP and AVIF?
BMP is Microsoft's uncompressed bitmap format. It's simple and lossless but huge: every pixel is stored raw, so a 12-megapixel photo takes about 36 MB.
AVIF is a modern format based on the AV1 video codec. It often produces files about half the size of JPG with fewer artefacts, and supports transparency and HDR.
Learn more: BMP format guide · AVIF format guide
| Property | BMP | AVIF |
|---|---|---|
| Compression | Usually none (optional RLE) | Lossy or lossless (AV1) |
| Transparency | Rarely (32-bit only) | Yes — full alpha |
| Animation | No | Yes |
| Colour depth | 1 to 32-bit | 8, 10 or 12-bit, HDR |
| Typical size, 12 MP photo | ≈ 36 MB | ≈ 0.8–1.5 MB |
| Support | Windows, most editors, all major browsers | Chrome 85+, Firefox 93+, Safari 16+, Edge 121+ |
| Best for | Legacy Windows software, embedded displays | Fast websites, hero images, photo galleries |
| Introduced | 1985 | 2019 |
Frequently asked questions
How long does BMP to AVIF take?
Usually 1–5 seconds per image on a modern laptop, longer for very large images or older phones. Everything runs locally, so your device's speed sets the pace.
Is AVIF suitable for archiving?
It's great for space-efficient copies, but for archival masters a lossless format like PNG (or the original BMP) is safer.
Are my BMP files uploaded to a server?
No. Fylo converts BMP to AVIF entirely inside your browser using a background Web Worker, so your files never leave your device. That's also why it's fast — there's no upload or download wait.
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