Convert WebP to AVIF Online Free
Next-gen compression. Convert WebP to AVIF for 20-30% smaller files at the same quality.
ToFormat — free online converter
Upload your files
Max file size: 30MB · Up to 20 files at once
Why ToFormat?
20-30% Better Compression
AVIF outperforms even WebP. A 100 KB WebP image can shrink to 70-80 KB in AVIF while looking identical — perfect for saving bandwidth and storage.
Superior Visual Quality
AVIF handles complex textures, gradients, and HDR content with fewer artifacts than WebP. Your images stay crisp at lower bitrates.
Transparency & HDR Support
Both WebP and AVIF support alpha transparency, but AVIF adds 10/12-bit color and HDR — ideal for high-end displays and professional work.
About the Formats
⚡ What is WebP?
WebP is a modern image format developed by Google, released in 2010. It supports lossy and lossless compression, transparency, and animation. WebP files are typically 25-35% smaller than JPG, making it a web standard.
All WebP 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. It compresses up to 50% better than JPG and 20-30% better than WebP, with support for HDR, wide gamut, and transparency.
All AVIF conversion tools →How to Convert
Upload WebP files
Click or drag your WebP images. Batch upload up to 20 files at once.
Choose quality
Adjust the quality slider to balance size and fidelity. Default 80% is optimized for most uses.
Download AVIF
Your AVIF files are ready. Download individually or as a ZIP. Files auto-delete in 10 minutes.
When to Convert WebP to AVIF
🌐 Website Performance
AVIF is the ultimate format for Core Web Vitals. Replacing WebP with AVIF cuts image payload by another 20-30%, boosting LCP and SEO.
💡 Need wider support? Try WebP to JPG →📱 Mobile Apps
Smaller images load faster on cellular networks and consume less data. AVIF is perfect for apps targeting modern devices.
💡 Universal compatibility: WebP to PNG →🖼️ High-End Displays
AVIF's HDR and 10-bit color preserve the full dynamic range of modern cameras and screens — ideal for photographers and designers.
💡 Lossless archival: WebP to TIFF →💾 Cloud Storage
Cut storage and CDN costs further. AVIF's superior compression means you store fewer bytes for the same quality.
💡 Try the reverse: AVIF to WebP →Format Comparison
| Format | WebP | AVIF |
|---|---|---|
| Compression | Lossy | Lossy |
| Transparency | Yes | Yes |
| File Size | Smaller | Smaller |
AVIF offers better compression but slightly lower browser support (93% vs WebP's 97%). Use WebP to AVIF with a WebP fallback via <picture>.
💡 Pro Tips
- AVIF encoding is slower than WebP because of its advanced algorithms. Our servers use optimized settings for the best speed/quality trade-off.
- For maximum browser reach, serve AVIF with a WebP fallback using the
<picture>element. This covers 99%+ of users. - AVIF supports lossless compression too. Set quality to 100% to get a lossless AVIF that is often smaller than lossless WebP.
- If your WebP contains animation, converting to AVIF will preserve it — AVIF supports animated sequences.
- Google PageSpeed Insights rewards sites using AVIF. Switching from WebP to AVIF can improve your Lighthouse score by a few extra points.
- AVIF handles transparency just like WebP, but with better compression for images with alpha channel.
How WebP to AVIF Conversion Works
AVIF is built on the AV1 video codec, using intra-frame prediction, large 64x64 superblocks, and advanced entropy coding. When you convert WebP to AVIF, our servers decode the WebP image to raw pixels and re-encode using the AV1-based encoder. This results in significantly smaller files while preserving visual quality.
The process is fully server-side and takes a few seconds per image. Files are automatically purged after 10 minutes. No registration required.
WebP vs AVIF: Technical Comparison
WebP uses VP8/VP9 compression, offering excellent quality at moderate file sizes. It supports transparency, animation, and is widely adopted.
AVIF leverages the more powerful AV1 codec, achieving 20-30% better compression at equivalent quality. It also supports HDR, 10/12-bit color, and wide color gamuts — features WebP lacks. Independent tests show AVIF consistently outperforms WebP in both PSNR and SSIM metrics.
Browser Support & Adoption
AVIF is supported in Chrome 85+, Firefox 93+, Safari 16.4+, and Edge 121+ — about 93% of global traffic. WebP enjoys slightly higher support (97%+). For production, serve AVIF with a WebP fallback. Major CDNs (Cloudflare, Fastly) automate this via content negotiation.
As AVIF adoption grows, converting your WebP assets now future-proofs your images. Explore all AVIF tools on ToFormat.