What will I receive?
BMP to AVIF
The AVIF result is a static 8-bit image with adjustable quality and compatible transparency. Check that the receiving application supports AVIF; a smaller file is not guaranteed.
Convert BMP to AVIF online
Convert legacy BMP bitmaps and captures to AVIF for a newer workflow.
Automatic deletion
InputBMPOutputAVIF
Step 1 of 3 · Files
Expires in 24 h- Files
- Format
- Result
Select BMP files
From your phone, computer, or drag them here. BMP · 50.0 MB per file · up to 5
The listed formats are accepted. Each file's structure is validated before conversion.
Conversion limits
What limits apply?
Up to 5 files, 50 MB each. Encrypted files, animations and unsafe content are not accepted. Structural validation may reject a conversion.
Input and output expire automatically after the period shown in the converter. Download your result before then.
Practical guide
Modernize a bulky BMP as an AVIF image
AVIF can provide a compact derivative of a legacy bitmap for a modern destination. Conversion uses adjustable quality and 8-bit output, but compatibility and savings must be checked with the real file.
Keep BMP as the legacy source
AVIF keeps the dimensions unless optional resizing is used, but it does not replace a master copy. Retain BMP for its original pixels; output metadata is removed and a different encoding is used.
Match quality to the content
For photographs and gradients, compare texture and banding; for screenshots, type and graphics, inspect edges at 100%. Higher quality may protect appearance, but it does not guarantee a smaller file in every case.
Do not assume transparency
AVIF supports alpha, although an ordinary BMP is normally opaque. A compatible channel is retained when present, but a format change cannot create transparency that the bitmap never had.
Compare modern formats before publishing
Verify AVIF support in the target platform. For a different support profile, compare BMP to WEBP; when the graphic needs a copy without adjustable photographic compression, BMP to PNG serves another intent.
Frequently asked questions
Does AVIF always make a BMP much smaller?
No. It depends on content, dimensions and chosen quality; compare the actual files for both size and appearance.
Will the AVIF have transparency?
Only when the decoded BMP has a compatible alpha channel. An ordinary BMP is usually opaque and remains so after conversion.
Is BMP metadata retained?
No. The image is normalized and saved without input metadata. Keep BMP when those data or master pixels are important.