Best format guide

Best Image Format for Web Performance

Use WebP by default for web image delivery with JPEG/PNG fallbacks.

Recommendation

Recommendation

WEBP

WebP balances strong compression and broad modern browser support for most web image workloads.

image/webp

AVIF

Use AVIF when aggressive size reduction matters and client support is confirmed.

Fichiers: 4

JPEG

Use JPEG for broad legacy compatibility and photo-heavy catalogs.

Fichiers: 6

Decision factors

Decision Factors

Facteurs de decision

  • Target browser/device support matrix.
  • Expected quality at production compression settings.
  • Transparency and animation requirements.
  • CPU cost of encode/decode in your pipeline.

Erreurs courantes a eviter

  • Shipping a single format to all clients without fallback behavior.
  • Comparing formats at mismatched quality levels.
  • Ignoring decode-time regressions on low-power devices.
FAQ

FAQ

Quelle est la recommandation principale dans ce guide ?

WEBP est le choix recommande par defaut pour ce cas d'usage.

Comment les equipes doivent-elles valider ce choix de format ?

Utilisez des fixtures d'echantillon et les endpoints de manifeste pour tester compatibilite, performance et conversion dans des conditions proches de la production.