Convert BMP and bitmap images to AVIF directly in your browser. Get the smallest modern format for web use from large uncompressed BMP files.
AVIF
Modern Format
~50%
Smaller Size
Fast
Browser Conversion
Private
No Uploads
Drop BMP files here or click to browse
Supports .bmp and .dib, all processing stays in your browser
AVIF encoding is slower than JPEG or WebP. Large files or batches may take a little longer — all processing happens in your browser.
AVIF is the right choice when file size matters most and the destination supports modern formats.
Large uncompressed BMP scans
Scanned photo BMP files are often very large since BMP rarely compresses. AVIF gives the biggest practical reduction.
Legacy bitmap archives for the web
Publishing a folder of old BMP files online becomes far more practical once each file is converted to AVIF.
Maximizing page speed
Replacing large BMP or JPEG files with AVIF reduces page weight more than most other widely available format choices.
Photographic content with rich detail
AVIF's advantage is most pronounced on detailed photographic images, exactly the kind of content often stored as BMP.
Not sure if AVIF is right for your case? The Optimize Images for SEO guide compares formats alongside the rest of the image SEO checklist.
AVIF is the most efficient widely supported format for photographic content, typically producing files around 50 percent smaller than an equivalent JPEG and noticeably smaller than WebP at the same visual quality. Since BMP files are usually uncompressed, converting straight to AVIF gives the largest possible reduction in file size for a photo or scanned image originally saved as BMP.
Yes. AVIF support is now near universal across Chrome, Firefox, Safari and Edge, and Google's PageSpeed Insights recommends it as a preferred format for web images. For situations needing guaranteed compatibility with very old browsers or software, WebP or JPEG remain safer fallback choices, but AVIF is the strongest default for most modern audiences.
Yes, AVIF encoding is more computationally intensive and can take noticeably longer than JPEG or WebP, especially for large BMP source files. This happens entirely in your browser using WebAssembly, so there is no upload wait, only the local encoding time itself.
No. Both the decoding and the AVIF encoding happen entirely in your browser. Your file never leaves your device at any point during the conversion.
