WebP vs AVIF vs JPEG XL: which should you use in 2026?

If you ship images on the web, you've probably wondered whether it's finally time to move past JPEG and PNG. The good news: all three modern contenders are genuinely excellent. The honest answer to "which one?" is it depends on what you're optimizing for — so let's make that decision concrete.

The short version

Reach for WebP when you want broad support and fast encodes today. Choose AVIF when file size matters most and you can spend more time encoding. Keep an eye on JPEG XL for the best quality-per-byte and lossless wins — its support is improving, and it's a superb archival choice.

File size, in practice

On a typical photographic image at visually-equivalent quality, AVIF and JPEG XL usually land smallest, with WebP a respectable step behind classic JPEG. But averages hide a lot: AVIF shines on smooth gradients and flat color, while JPEG XL tends to preserve fine texture and grain more faithfully at the same byte budget.

Don't pick a format in the abstract. Encode your real images at a target quality and compare — the winner shifts by content type.

Encode speed & effort

This is where WebP earns its keep: it's fast. AVIF's best results come from higher "effort" settings that cost real CPU time, which matters for large batches or build pipelines. JPEG XL sits in between and offers a genuine lossless mode that can even transcode existing JPEGs smaller without re-compressing pixels.

# Same image, three targets — let the smallest win
imageforge hero.png --convert webp --quality 80
imageforge hero.png --convert avif --effort 6
imageforge hero.png --convert heic --quality 80

Browser & OS support

WebP is effectively universal. AVIF is supported across all current major browsers, though decoding very large images can be heavier. JPEG XL support is the most uneven of the three on the web in 2026 — which is exactly why a tool that converts and falls back gracefully is so useful.

A simple rule

Serve AVIF with a WebP fallback for most web imagery today, and archive masters in JPEG XL (lossless) so you never lose quality you might want later. ImageForge can produce WebP, AVIF and HEIC from one drop and keep whichever wins on size — so you don't have to choose blindly.