Comparison
WebP vs AVIF: Which Next-Gen Image Format Should You Use in 2026?
TL;DR
| WebP | AVIF | |
|---|---|---|
| Developer | Google (2010) | AOM (AV1 codec, 2019) |
| Browser support | 97%+ (all modern browsers since 2020) | 93%+ (Chrome 85+, Firefox 93+, Safari 16+) |
| Compression | ~30-40% smaller than JPG | ~50-60% smaller than JPG (20-30% smaller than WebP) |
| Lossless | Supports lossless (WebP LL) | Supports lossless |
| Animation | Supports animated WebP (replaces GIF) | Supports animated AVIF (replaces GIF + WebP) |
| HDR / wide gamut | Limited (8-bit only) | Full HDR (10/12-bit, Rec. 2020, PQ/HLG) |
| Encoding speed | Fast (seconds per image) | Slow (10-30s per image at high quality) |
The options in depth
WebP
The safe default — works everywhere, good compression, fast encoding.
Good for
- ·Websites where you want to replace JPG/PNG without a fallback strategy
- ·CMS and build pipelines (fast encoding)
- ·Animated images (replacing GIF)
Avoid when
- ·HDR photography (AVIF is dramatically better)
- ·Image-heavy apps where every KB counts (AVIF gets 20-30% more)
- ·iOS-only apps before iOS 16 (AVIF was the better option even before Universal support)
AVIF
The cutting-edge format — 20-30% smaller than WebP, with HDR support.
Good for
- ·Image-heavy sites (every KB counts at scale)
- ·HDR photography and wide-gamut displays
- ·iOS 16+ apps
Avoid when
- ·Environments where encoding time is critical (AVIF is slow)
- ·Targeting older browsers (Safari < 16, older Android WebView)
- ·Simple icons that compress fine in WebP or SVG
Which one should you pick?
→ Should I serve both WebP and AVIF?
If your CDN supports automatic format negotiation (Accept header), serve AVIF as the primary and WebP as the fallback. If you can't auto-negotiate, just serve WebP — the 20-30% AVIF advantage isn't worth the complexity of a manual fallback pipeline.
→ Is AVIF ready for production in 2026?
Yes — browser support is 93%+, and the remaining 7% (mostly older Safari on iOS 15) can be caught with a WebP fallback. Major image CDNs (Cloudinary, imgix) and WordPress plugins now support AVIF out of the box.
Common pitfalls
- ⚠AVIF encoding is slow — a 4000×3000 photo at quality 6 can take 10-30 seconds on a typical laptop. For CI/CD pipelines or CMS workflows, encode in a separate background job, not synchronously.
- ⚠WebP's lossless mode sometimes produces LARGER files than the original PNG — it's optimised for photographic data, not pixel art. For pixel art with a limited palette, stick with PNG or SVG.
- ⚠Both formats support animation replacing GIF — animated WebP is typically 60-90% smaller than GIF; animated AVIF is even smaller but encoding is impractically slow for complex animations.
Frequently Asked Questions
How do I convert an existing image library to WebP or AVIF?
Use our Image to WebP or Image to AVIF converters — both run client-side. For bulk conversion (thousands of images), use a CLI tool: cwebp/cavif for batch processing.
What <picture> element do I use for AVIF + WebP fallback?
<picture><source srcset='photo.avif' type='image/avif'><source srcset='photo.webp' type='image/webp'><img src='photo.jpg' alt='...'></picture>. The browser picks the first source it supports, with JPG as the universal fallback.