Private browser tool

Convert BMP to AVIF

Turn a large BMP bitmap into a compact modern AVIF. Control quality and dimensions locally in your browser.

AVIF Choose a BMP image or drag and drop it here

One BMP image at a time

Output format: AVIF

AVIF quality 75%

Resize (optional)

WidthHeight

Lock aspect ratio Do not enlarge the image

Target maximum size (optional)

Quality is adjusted automatically when set. Output filename

The AVIF is newly encoded without the source metadata.

BMP conversion guide

How to convert BMP to AVIF

Choose a BMP, customize the AVIF output, and download it when your browser supports AVIF encoding.

Select an image from your device or drag it into the upload area.

Choose quality, dimensions, and an optional maximum file size.

Review the preview and file size, then save the converted image.

This free online BMP to AVIF converter includes the following controls and output tools:

Private browser conversion. The image is processed locally and is not uploaded.
Custom dimensions. Set an exact width and height, lock the aspect ratio, and prevent accidental enlargement.
Quality and file-size controls. Set AVIF quality or enter a maximum size in KB to find the highest quality that fits.
Before-and-after preview. Review the original and converted image, output dimensions, format, and file size.
File-size comparison. See the original and converted sizes and the percentage change.
Custom filename. Rename the converted file before downloading it.
Metadata-free export. The newly encoded AVIF does not copy source metadata.

AVIF can dramatically reduce the size of an uncompressed or lightly compressed BMP.

For pixel art or exact graphics, inspect the preview carefully because lossy AVIF can soften hard edges.

BMP decoding and AVIF encoding are browser capabilities. Some BMP variants or browsers may not support the workflow.

The newly encoded AVIF does not copy BMP metadata. Keep the source when exact original pixels matter.

Is this BMP to AVIF converter free?

Yes. Convert one BMP at a time.

Why is AVIF much smaller?

AVIF uses advanced compression while BMP often stores nearly raw pixels.

Why can export fail?

Your browser may not support AVIF encoding.

Can I resize the image?

Yes. Enter a width or height and optionally lock the ratio.

Is my BMP uploaded?

No. Conversion happens locally.

Use the full converter for HEIC, PNG, WebP, JPG, GIF, TIFF, BMP, AVIF, and more.