WebP vs AVIF
Differences, use cases, and when to use each
WebP and AVIF are both modern image formats offering better compression than JPEG/PNG. AVIF typically achieves 20% smaller files than WebP but encodes slower and has less browser support.
Quick Comparison
| Feature | WebP | AVIF |
|---|---|---|
| Size at Same Quality | Baseline | ~20% smaller |
| Encoding Speed | Fast | Slow (10-100x slower) |
| Browser Support | All modern browsers | Chrome, Firefox, Safari 16+ |
| Max Resolution | 16,383 × 16,383 | 65,536 × 65,536 (tiled) |
| HDR Support | No | Yes |
When to Use Each
When to Use WebP
Use WebP as the primary modern format — it has near-universal browser support, fast encoding, and excellent compression. It's the safe default for web images.
When to Use AVIF
Use AVIF for maximum compression when encoding speed isn't a concern and your audience uses modern browsers. Ideal for image-heavy sites where every KB matters.
Pros & Cons
WebP
Wide browser support
Fast encoding
Proven and stable
Larger than AVIF at same quality
No HDR support
AVIF
Smallest file sizes
HDR and wide gamut support
Best visual quality per byte
Slow encoding
Less browser support
Newer, less proven
Verdict
WebP as the primary format with AVIF for progressive enhancement. Serve AVIF to browsers that support it, fall back to WebP, then JPEG using the <picture> element.