Is my image uploaded to a server?

No. Everything happens locally in your browser using the Canvas API. Your image is never sent to any server.

Which browsers support AVIF encoding?

AVIF encoding via the Canvas toBlob API is supported in Chrome 113+, Edge 113+, and Firefox 113+. Safari has read support but limited encoding support. If your browser does not support it, the tool will show a clear notice.

What is the difference between BMP and AVIF?

BMP (Bitmap) is an uncompressed raster format that produces very large files. AVIF (AV1 Image File Format) is a modern, royalty-free format with excellent compression — typically 50-90% smaller than BMP at comparable visual quality.

Does the quality slider affect the output?

Yes. Lower values produce smaller files with more compression artifacts. Higher values preserve more detail but yield larger files. A value of 80 is a good starting point for most images.

Will the converted AVIF preserve transparency?

BMP files do not carry transparency. The converted AVIF will have a solid background matching the original BMP content.

What is the maximum file size I can convert?

There is no server-side limit. Practical limits depend on your device RAM. Files up to 20 MB work on most modern computers.

BMP to AVIF Converter

Upload a BMP image, adjust quality, and download it as an AVIF file — all in your browser, no server upload needed.

Upload BMP Image

Drag & drop a BMP file here

or click to browse

Preview & Download

Upload a BMP file to see the preview here.

Summary

This free online BMP to AVIF converter transforms your bitmap images into the modern AVIF format entirely within your browser. Your files never leave your device — conversion uses the Canvas API and the browser's built-in AVIF encoder. Upload a BMP file, choose your quality level, compare original vs. output file sizes, and download the result in one click. Note: AVIF encoding requires a modern browser such as Chrome 113+, Edge 113+, or Firefox 113+.

How it works

Upload a BMP image by clicking the drop zone or dragging a file onto it.
The browser reads the file and draws it onto an HTML Canvas element.
Use the quality slider to control the AVIF output quality (1–100).
Click Convert to AVIF — the canvas exports the image using your browser's native AVIF encoder.
A preview of the converted image is shown alongside original and output file sizes.
Click Download AVIF to save the converted file to your device.

Use cases

Convert legacy BMP screenshots to the compact AVIF format for web delivery.
Reduce file size dramatically compared to BMP or even JPEG with AVIF compression.
Prepare bitmap artwork for modern web projects that support AVIF.
Quickly test AVIF compatibility and file-size savings before a full workflow.
Convert BMP assets for mobile apps or progressive web apps requiring small payloads.
Archive images in a modern, royalty-free format without installing software.

Frequently Asked Questions

Last updated: 2026-05-29 · Reviewed by Nham Vu