Does converting BMP to AVIF improve the image quality?

No, and it can get slightly worse. BMP keeps every pixel; AVIF is a lossy format that discards some detail to make the file smaller.

What happens to transparency?

There is nothing to preserve: BMP has no transparency, so this does not come up.

Is there a file size limit?

No limit that we impose. The only ceiling is your device's memory, so a very large photo or a long recording may take a few seconds.

Are my files uploaded anywhere?

No. The conversion runs inside this browser tab, so the file never leaves your device — go offline once the page has loaded and keep converting.

BMP to AVIF converter

Convert BMP files to AVIF right in your browser. Nothing is uploaded, there is no sign-up, and there is no file limit.

Runs on your device
No upload, no queue
Batch + ZIP download

Drop files here, or click to choose

Supports PNG, JPG, WEBP, AVIF, BMP, GIF, SVG, HEIC, TIFF and ICO — and writes GIF, TIFF and PDF too. Files stay on your device.

Convert to

Max width (px, optional)

Quality

How to convert BMP to AVIF

Drop your BMP file onto the box above, or click it to browse.
Choose AVIF as the output format.
Press convert, then download the result.

BMP vs AVIF

BMP works well for uncompressed editing work. AVIF works well for modern sites squeezing every kilobyte. The table below compares the two on the things that usually decide the choice.

	BMP	AVIF
Compression	Lossless	Lossy
Transparency	No	Yes
Best for	uncompressed editing work	modern sites squeezing every kilobyte

Questions about BMP to AVIF

Does converting BMP to AVIF improve the image quality?: No, and it can get slightly worse. BMP keeps every pixel; AVIF is a lossy format that discards some detail to make the file smaller.
What happens to transparency?: There is nothing to preserve: BMP has no transparency, so this does not come up.
Is there a file size limit?: No limit that we impose. The only ceiling is your device's memory, so a very large photo or a long recording may take a few seconds.
Are my files uploaded anywhere?: No. The conversion runs inside this browser tab, so the file never leaves your device — go offline once the page has loaded and keep converting.

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