ComparisonApril 30, 20266 min read

WebP vs AVIF – which modern image format is better?

WebP and AVIF are the two big modern image formats for the web. Both beat JPG on compression — but which is the right call in 2026? The answer hinges on browser support, encoding efficiency and practical overhead.

Compression head-to-head

AVIF is based on the AV1 video codec and produces files roughly 20–30% smaller than WebP at the same quality. WebP itself is 25–35% smaller than JPG. So AVIF can be up to 50% leaner than JPG — a huge win on mobile networks.

At very low quality settings, AVIF preserves detail and gradients much better. At high quality the gap shrinks. For everyday web images at mid quality, AVIF wins almost every benchmark.

Browser support and tooling

WebP has been available in every browser for years (Chrome, Firefox, Edge, Safari, Opera). AVIF gained universal support in 2024 — but for legacy iOS and older browsers a fallback is still smart.

Encoding cost is the bigger gap: AVIF takes far longer to encode than WebP. That matters in build pipelines; for static sites it's irrelevant because encoding happens once.

Recommendation for 2026

For image-heavy modern sites: AVIF as primary, WebP as fallback, JPG as last resort — wired via `<picture>`. Around 95% of visitors get AVIF, the rest WebP, and no one sees a broken image.

If you don't want to maintain a three-format pipeline, plain WebP still serves you well. The win over JPG is significant and the maintenance cost is minimal.

Who pays for the encoding compute?

AVIF encoding takes 5-20x longer than WebP depending on the encoder. On Vercel or Netlify with on-the-fly image optimization, those seconds show up as cold-start latency — especially on the very first request for an image.

For static sites with build-time optimization (Astro, Next with the next/image cache), it's a non-issue: encoded once, served thousands of times. That's where AVIF pays off in full.