WebP vs AVIF: The Next-Generation Format Battle
As the web moves beyond JPEG and PNG, two modern formats compete for dominance: WebP (2010) and AVIF (2019). Both offer significant improvements over legacy formats, but they differ in important ways.
Compression Performance
AVIF generally achieves better compression than WebP, especially at low quality settings:
- AVIF can be 30–50% smaller than WebP at equivalent visual quality
- At high-quality settings, the gap narrows significantly
- WebP lossless still has an edge over AVIF lossless in some scenarios
Image Quality
AVIF is based on the AV1 video codec and handles:
- Smooth gradients without banding
- Fine detail preservation at high compression
- HDR and wide color gamut (10-bit color depth)
WebP at high quality is excellent, but AVIF pushes further at extreme compression.
Browser Support
| Browser | WebP | AVIF |
|---|---|---|
| Chrome | ✅ Full | ✅ Full |
| Firefox | ✅ Full | ✅ Full |
| Safari | ✅ 14+ | ✅ 16+ |
| Edge | ✅ Full | ✅ Full |
| IE | ❌ | ❌ |
Encoding Speed
WebP encodes significantly faster than AVIF. AVIF encoding can be 10–50x slower, which matters for real-time image processing pipelines.
Which Should You Choose?
- Choose WebP if encoding speed matters, you need broad compatibility, or you're migrating from JPEG/PNG today
- Choose AVIF if maximum compression is the priority and you can accept slower encoding
Conclusion
AVIF is technically superior but WebP remains the pragmatic choice for most projects in 2024. Consider using both with <picture> element fallbacks.