Convert BMP to AVIF
Convert BMP to AVIF for next‑gen compression. Dramatically reduce file size while preserving quality.
ToFormat — free online converter
Upload your files
Max file size: 30MB · Up to 20 files at once
Why ToFormat?
Up to 90% Smaller Files
BMP files are uncompressed and huge. AVIF can shrink them by 90%+ at the same visual quality — perfect for websites, portfolios, and cloud storage.
Preserve Quality
Our encoder extracts every pixel from your BMP and re‑encodes to AVIF with minimal loss. Fine‑tune the quality slider to match your needs.
Batch Conversion
Upload up to 20 BMP images at once. We process them simultaneously and package them in a ZIP for one‑click download.
About the Formats
🖼️ What is BMP?
BMP (Bitmap) is a raster graphics format developed by Microsoft. It stores pixel data uncompressed (usually), resulting in large files but exact fidelity. It's the simplest format, supported everywhere, but impractical for web use due to size.
All BMP conversion tools →🚀 What is AVIF?
AVIF (AV1 Image File Format) is a next‑generation format based on the AV1 video codec. Created by the Alliance for Open Media — Google, Apple, Mozilla, Netflix — it compresses up to 50% better than JPG and 20‑30% better than WebP, with support for transparency, HDR, and wide color gamut.
All AVIF conversion tools →How to Convert
Upload your BMP
Click the upload area or drag and drop your BMP files. You can select up to 20 at once.
Adjust quality
Move the quality slider to balance file size and detail. The default 80% is optimal for most images. Choose lossless for pixel‑perfect output.
Download AVIF
Your compressed AVIF files are ready. Download within 10 minutes before they're automatically deleted.
When to Convert BMP to AVIF
🌐 Website Performance
Replace huge BMP images on your site with lightweight AVIF. Improve load times, Core Web Vitals, and user experience.
💡 Wider support: try BMP to WebP →📱 Mobile & Cloud
Smaller images load faster on cellular networks and consume less cloud storage. AVIF is ideal for apps and content delivery.
💡 Universal compatibility: BMP to JPG →🖼️ Online Galleries
Display high‑resolution scans or graphics at a fraction of the file size. AVIF preserves fine details and colors.
💡 Lossless archival: BMP to PNG →💾 Storage Savings
Archive your original BMPs but create AVIF access copies. Save gigabytes of disk space while keeping excellent quality.
💡 Next‑gen: BMP to AVIF →Format Comparison
| Format | BMP | AVIF |
|---|---|---|
| Compression | Lossless | Lossy |
| Transparency | No | Yes |
| File Size | Larger | Smaller |
Need wider browser support? BMP to WebP covers 97%+ browsers vs AVIF's 93%+. For pixel‑perfect lossless output, try BMP to PNG.
💡 Pro Tips
- AVIF encoding is slower than JPG or WebP — but the 90%+ size savings are worth every millisecond. Our servers use optimized settings for the best speed‑to‑quality ratio.
- Serve AVIF with a WebP or JPG fallback via the HTML
<picture>element for maximum browser reach. - BMP often stores data in BGR order. We handle that automatically so colors appear correct in AVIF.
- If your BMP uses paletted colors (8‑bit), we expand them to full color during conversion.
- For maximum metadata retention, enable EXIF preservation. (BMP rarely contains metadata, but we support it.)
- AVIF supports transparency. If your BMP is 32‑bit with alpha, we preserve it in the AVIF output.
How BMP to AVIF Conversion Works
AVIF is built on the AV1 video codec — a royalty‑free, open standard developed by the Alliance for Open Media. When you convert BMP to AVIF, our encoder decodes the BMP pixel data (which may be 1‑bit to 32‑bit) and re‑encodes using AVIF's modern toolset: variable block sizes up to 64×64, intra‑frame prediction, and context‑adaptive binary arithmetic coding. The result is a file that is 90%+ smaller at the same perceived quality — or visually superior at the same byte count.
The process is fully server‑side and takes 1‑3 seconds per image. Your files are automatically deleted within 10 minutes. No software to install, no account required.
BMP vs AVIF: Technical Comparison
BMP stores images uncompressed (or with simple RLE), resulting in massive files. It supports 1‑bit to 32‑bit color, including alpha in 32‑bit versions. AVIF uses advanced compression techniques to achieve 90%+ size reduction while supporting high bit depth, HDR, and alpha. Independent studies show AVIF consistently outperforms older formats.
BMP is simple and universally supported, but its size makes it impractical for modern web use. AVIF delivers the same visual quality at a fraction of the size, making it ideal for distribution.
AVIF Browser & Platform Support (2026)
AVIF is supported in Chrome 85+, Firefox 93+, Safari 16.4+, Edge 121+, and Opera — over 93% of global browser traffic. The remaining gap is primarily older iOS/iPadOS versions and legacy enterprise browsers.
For production websites the recommended pattern is to serve AVIF as the primary source inside a <picture> element, with a WebP middle layer (97% support) and a JPG fallback. Major CDNs — Cloudflare, Fastly, Imgix, AWS CloudFront — can automate this via Accept‑header content negotiation.
Beyond the browser, AVIF is natively supported in Android 12+, Windows 11 Photos, GIMP 2.10+, and Adobe Photoshop 25+. Explore all our AVIF conversion tools for more options.
Frequently Asked Questions
<picture> element.