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BMP to AVIF Converter

Convert BMP images to AVIF right in your browser, one file or a whole batch. For photos, the AVIF is usually a fraction of the size.

  • Free, no sign-up
  • Files never leave your device
  • Batch processing
  • No watermark
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Your files are processed on this device and are never uploaded to a server.

What happens when you convert BMP to AVIF

CompressionLossless → Lossy or lossless
File sizeUsually far smaller: often under a fifth of the size for photos
MetadataEXIF, GPS location and camera data are not copied to the new file
Opens inChrome, Edge, Firefox, Safari 16+ and Windows 11 with the AV1 extension; most editors and CMSs do not yet

Sizes are typical values; your files will vary with content and settings.

BMP

BMP Windows Bitmap

BMP is the uncompressed bitmap format native to Windows. Files are large because each pixel is stored raw, but almost every program, embedded device and legacy system can read it.

BMP converter
AVIF

AVIF AV1 Image File Format

AVIF stores images with the AV1 video codec. It usually beats WebP on file size, handles HDR and wide colour, and supports transparency. Chrome, Firefox, Edge and Safari 16+ display it.

AVIF converter

How to use the BMP to AVIF Converter

  1. 1

    Click Choose files or drop your BMP images onto the page.

  2. 2

    Adjust the AVIF options if needed. The defaults work well for most images.

  3. 3

    Click Convert, then download each AVIF or all of them as a ZIP.

Why convert BMP to AVIF?

BMP files come from old Windows software, Paint, scanners and embedded devices that write raw bitmaps. Files are very large because there is no compression. Choose AVIF for the smallest web images, after checking that your CMS or upload target accepts it.

BMP to AVIF settings

Use the quality slider to balance size against detail; 80 to 90 percent is a good default for AVIF. You can also cap the width and height, which resizes large photos in the same step.

Frequently asked questions

Will the AVIF lose quality?

AVIF uses lossy compression, so some fine detail is discarded to make the file smaller. At the default quality setting the difference is very hard to see. Raise the quality slider if you need the result to stay closer to the BMP original.

Will the AVIF be smaller than the BMP?

Usually much smaller for photos: as a rough guide, the AVIF comes out at around 5% of the BMP's size, depending on the quality setting.

Questions about privacy, file-size limits or conversion speed are answered in the general FAQ.