BMP to AVIF Converter

Convert BMP (Windows Bitmap) images to the modern AVIF format for dramatically smaller file sizes with excellent quality. AVIF offers up to 50% better compression than JPEG while supporting transparency and HDR. Perfect for web optimization, reducing storage costs, and modernizing legacy BMP image collections.

Drop your BMP files here

or click to browse files

BMP Batch Upload
Max 50MB per file • Up to 10 files

Related Tools

AVIF to BMP BMP to PNG BMP to JPG BMP to ICO BMP to WebP BMP Analyzer BMP Viewer

How to Convert BMP to AVIF

  1. Upload your BMP images by dragging and dropping or clicking the upload area. You can select up to 10 files at once for batch conversion.
  2. Adjust quality settings: Use the slider to balance between file size and image quality. Higher values preserve more detail but create larger files.
  3. Choose encoding speed: Fast encoding is great for testing, while Best Compression creates the smallest possible files.
  4. Optional resizing: Enable resize to change dimensions by percentage or specific pixel values during conversion.
  5. Convert and download: Click the convert button and download individual files or all as a ZIP archive.
Pro tip: Need sample BMP files to test? Visit our BMP sample images page to download test files. Use our BMP Analyzer to check your image properties before converting, or preview images with our BMP Viewer.

BMP vs AVIF Comparison

BMP

The native Windows bitmap format since 1987. Stores images without compression for perfect quality but extremely large file sizes. Widely supported but inefficient for web use. View BMP files with our BMP viewer.

AVIF

Modern next-gen format based on the AV1 video codec. Offers 50% better compression than JPEG with support for transparency, HDR, and wide color gamut. Rapidly gaining browser support. Analyze with our AVIF analyzer.

Feature BMP AVIF
Compression None (lossless) Lossy & lossless
File Size Very large Very small
Transparency Limited (32-bit) Full support
Browser Support Universal Chrome, Firefox, Safari 16+
Best For Legacy software Web, storage optimization

When to Convert BMP to AVIF

Web Optimization

Dramatically reduce page load times by converting BMP images to AVIF. Smaller files mean faster websites and lower bandwidth costs. Use our Image Optimizer for more options.

Storage Savings

BMP files are uncompressed and consume massive storage space. Converting to AVIF can reduce storage requirements by 90-99% while maintaining visual quality.

Archive Modernization

Update legacy BMP archives to modern formats. AVIF offers better compression than any other format while supporting lossless compression for archival quality.

Faster Sharing

BMP files are too large for email or messaging. Convert to AVIF for faster uploads and sharing while keeping excellent quality. Also try BMP to JPG for maximum compatibility.

AVIF Quality Settings Explained

50% (Web)

Maximum compression. Best for thumbnails, previews, and images where small file size is critical. Some quality loss visible on close inspection but acceptable for web use.

80% (Balanced)

Recommended setting. Excellent balance between file size and quality. Virtually indistinguishable from the original for most images. Ideal for general web and storage use.

95% (High)

Near-lossless quality. For professional photography or when you need to preserve fine details. Slightly larger files but excellent quality preservation.

100% (Lossless)

Perfect quality. No data is lost during compression. Larger files than lossy modes but smaller than BMP. Ideal for archival or when you may need to edit the image later.

Start with 80% quality for most conversions. If you notice quality issues, increase the value. For already-compressed source images, higher quality settings help avoid additional artifacts.

Frequently Asked Questions

BMP files are uncompressed and extremely large. AVIF offers superior compression that can reduce file sizes by 90-99% while maintaining excellent visual quality. This makes images faster to load, easier to share, and cheaper to store. AVIF also supports features BMP lacks, like transparency and HDR.

It depends on your quality setting. At 100% (lossless), no data is lost. At 80% (recommended), quality loss is virtually imperceptible to the human eye. Lower quality settings will show some degradation but provide maximum file size reduction. Since BMP is lossless, you're starting with perfect quality.

Since BMP is uncompressed, you'll see dramatic savings. A 10MB BMP file typically converts to a 100-500KB AVIF file at quality 80 - that's 95-99% smaller! Even at lossless settings, AVIF files are typically 70-90% smaller than the original BMP.

Yes! AVIF has full alpha channel support and handles transparency much better than 32-bit BMP. The transparency data is preserved during conversion with excellent compression. For transparent images, you might also consider PNG format.

AVIF is supported in Chrome 85+, Firefox 93+, Safari 16+, and Edge 121+. This covers over 90% of web users. For maximum compatibility with older browsers, consider using WebP or JPEG as a fallback format.

Each BMP file can be up to 50MB, and you can upload up to 10 files at once for batch conversion. Since BMP files are uncompressed, 50MB allows for quite large images (approximately 4000x3000 pixels at 32-bit).

Files are temporarily stored only during the conversion process and are automatically deleted within 24 hours. We don't keep copies of your images or use them for any purpose other than the requested conversion.