Convert BMP to AVIF — Maximum Compression
BMP files store every pixel without compression, resulting in enormous file sizes. AVIF is the most efficient modern image format, built on the AV1 video codec. Converting BMP to AVIF gives you the greatest possible file size reduction — typically 97-99% — while the image looks virtually identical.
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HEIC, WEBP, AVIF, TIFF, BMP, SVG, GIF, PNG, JPG, PDF, CR2, NEF, ARW, DNG — up to 50MB each, or 50 from a folder
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Modern format with excellent compression. Limited browser support.
Apple's format. Excellent quality at small sizes.
Lossless format. Large files, ideal for print/archival.
256 colors max. Best for simple graphics.
Uncompressed bitmap. Very large files.
Vector trace. Best for logos and simple graphics. Not a pixel-perfect conversion.
Same format? You might want to compress instead.
SSIM-optimized — finds the lowest file size at your chosen visual fidelity.
Need to crop first? Use the Crop tool. Want to adjust or filter? Try the Editor.
Resize tool → Live preview, percentage scaling, and dimension presets.
Tip: Use PNG or WebP for transparent output. Standalone tool →
Lossless format — files can be large
GIF is limited to 256 colors
Best for logos, icons, and line art. Photos produce stylized results.
BMP files are uncompressed and can be very large. Consider TIFF (LZW) or PNG for lossless with smaller file sizes.
Leave empty for all pages. Multi-page PDFs produce a ZIP.
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BMP vs AVIF Comparison
| Feature | BMP | AVIF |
|---|---|---|
| Full Name | Bitmap Image File | AV1 Image File Format |
| Lossy Compression | ❌ | ✅ |
| Lossless Compression | ✅ | ✅ |
| Transparency | ❌ | ✅ |
| Animation | ❌ | ✅ |
| Browser Support | Most browsers (legacy format) | Chrome 85+, Firefox 93+, Safari 16.4+ |
| Color Depth | 16.7M (24-bit) | 16.7M+ (up to 12-bit HDR) |
| Typical Use | Windows legacy, uncompressed images | Next-gen web images (even smaller than WEBP) |
| Year Introduced | 1986 | 2019 |
Why Convert BMP to AVIF?
BMP has zero compression: a 1920×1080 image is over 6 MB as a BMP. AVIF applies AV1 compression to produce files that are a tiny fraction of the BMP size. This makes your images practical for email, web, and mobile use. BMP is also unsupported by most web browsers and social platforms, while AVIF has broad support.
How to Convert BMP to AVIF
Upload your BMP file by dragging it into the converter or clicking to browse. Files up to 50 MB are supported.
KoalaPic reads the uncompressed pixel data and encodes it to AVIF with optimized AV1 compression settings.
Download the compact AVIF file. Both files are automatically deleted after 1 hour.
Quality Note
Since BMP is uncompressed, you’re starting from a perfect source. Converting to AVIF at quality 80+ preserves virtually all visible detail while reducing file size by 97-99%. You can use smart quality mode for automatic SSIM-based optimization.