For years the image format debate was simple: WebP or AVIF. Then JPEG XL arrived with serious momentum — supported by major browsers, backed by the JPEG committee, and promising near-lossless compression without the encoding tax of AVIF. In 2026, the choice is no longer binary.
Here's how the three contenders stack up on compression, browser support, encoding speed, and real-world usability.
Quick Stats
A 1920×1080 JPEG photo (1.2 MB) converted to each format at visually lossless quality:
Visible color banding
Smooth gradients, HDR
Full Comparison
| Feature | WebP | AVIF | JPEG XL |
|---|---|---|---|
| Lossy compression | ✓ | ✓ | ✓ |
| Lossless compression | ✓ | ✓ | ✓ |
| Transparency | ✓ | ✓ | ✓ |
| HDR / wide gamut | ✗ | ✓ | ✓ |
| Progressive decoding | ✗ | ✗ | ✓ |
| Lossless JPEG recompression | ✗ | ✗ | ✓ |
| Animation support | ✓ | ✗ | ✓ |
| Browser support | ~97% | ~93% | ~88% |
| Encode speed | Fast | Slow | Medium |
| Decode speed | Fast | Medium | Fast |
Browser Support
All three formats are supported in the latest versions of Chrome, Firefox, Safari, and Edge. JPEG XL has the narrowest support today — enabled behind a flag in Chrome, experimental in Firefox, and native in Safari 17+. That said, its adoption is accelerating as more CMS platforms and CDNs add support.
Sharp but large
Identical sharpness
Three Use Cases, Three Winners
Photography & e‑commerce — JPEG XL
JPEG XL's lossless recompression of existing JPEGs is a killer feature: you can shrink legacy JPEG files by another 20% without re-encoding (no quality loss). Its progressive decoding also means partial-image previews load almost instantly on slow connections — something neither WebP nor AVIF can do.
General web use — WebP
WebP remains the safe default. It has the widest browser support, the fastest encoding times, and a mature toolchain. If you need one format that works everywhere today without fallbacks, WebP is still the answer.
Bandwidth-critical apps — AVIF
AVIF still delivers the best compression ratios — about 30% better than WebP at the same subjective quality. For image-heavy applications where every kilobyte matters (news sites, image boards, CDN bills), AVIF's extra encoding time is a worthwhile trade.
Reality check for developers: You don't have to pick one. Use <picture> with multiple <source> elements — serve JPEG XL first, fall back to AVIF, then WebP, then JPEG. Browsers download only the first format they support. If you're converting files regularly, browser-based tools can handle the workflow without setting up encoders locally.
Verdict
- Compression winner: AVIF (by a narrow margin)
- Compatibility winner: WebP (by a wide margin)
- Feature winner: JPEG XL (progressive, recompression, animation)
- Best format for new projects in 2026: JPEG XL, with WebP fallback
JPEG XL is the format to watch. If you can afford the slightly narrower compatibility today, it's the most future-proof choice — especially for photography-driven sites. WebP remains the pragmatic default. AVIF is the specialist you call for maximum compression.
If you need to convert between these formats, there are capable browser-based tools that handle the whole workflow locally — no uploads, no server queues.