WebP vs AVIF in 2026: which should you actually use?
For years the answer to "which modern image format should I use?" was complicated by one thing: browser support. That excuse is gone. As of 2026, Chrome, Firefox, Safari and Edge all decode both WebP and AVIF, and WebP alone is supported by roughly 97% of browsers in use. The choice now comes down to compression, speed and workflow — and the answer is less dramatic than most comparisons imply.
The short version
Google's own compression study put lossy WebP at about 25–34% smaller than JPEG at equivalent visual quality. AVIF usually goes further — expect it to land somewhat smaller again than WebP at the same quality, especially on photographs. But AVIF pays for those bytes with encoding time: it is dramatically slower to produce, and browser-native tools cannot generate it at all, because the canvas API that powers in-browser conversion simply has no AVIF encoder. WebP, by contrast, can be created by any browser in milliseconds — which is why every tool on this site converts to WebP instantly and locally.
| WebP | AVIF | |
|---|---|---|
| Size vs JPG | 25–34% smaller at equal quality | Usually smaller again than WebP |
| Browser support (2026) | All majors (~97% of users) | All majors |
| Encoding speed | Instant, even in-browser | Slow; needs dedicated encoders |
| Animation & alpha | Yes / yes | Yes / yes |
| Tool ecosystem | Mature everywhere | Improving, still uneven |
The compatibility traps nobody mentions
Browser support is not the whole story. The places images actually get used lag behind the browsers that view them:
- Email clients are the big one. Many still render neither WebP nor AVIF reliably, which is why newsletters remain a JPG stronghold.
- Some platforms and CMSs accept the upload but re-encode or reject modern formats on output. Test one image through your actual publishing pipeline before converting a library.
- Older design and editing software may open neither. Keep your originals in a universal format.
This is why "just ship WebP" became the community default on Reddit and developer forums: it is the only modern format that is simultaneously smaller than JPG, universally decoded, and effortless to produce. AVIF wins on bytes but costs you time and occasionally a broken workflow.
A one-line rule for every situation
- Website photos and hero images: WebP at quality 75–80. Instant, safe, and typically a third off your JPG weight. Move to AVIF later only if your measurements show it matters.
- Logos and UI graphics: WebP (lossless or lossy) or PNG. Both modern formats keep transparency.
- Email newsletters: JPG. Compatibility beats optimisation when the renderer is a 2015 Outlook install.
- Image-heavy pages chasing every millisecond: consider AVIF where your toolchain supports it — but measure, don't assume.
One more practical note: the biggest wins come from choosing the right format and resolution at all, not from squeezing the last 5% between WebP and AVIF. A 4000-pixel-wide photo served at 800 display pixels wastes far more bytes than any format choice saves.
Convert without uploading anything
You can try this on your own images right now: the image converter switches files between PNG, JPG and WebP entirely in your browser, and the compressor can hit an exact target size — useful when a platform caps uploads. Because everything runs locally on your device, you can safely test private photos, client work or documents, and nothing is sent to any server.
Frequently asked questions
Does Safari really support WebP and AVIF now?
Yes. Safari has decoded WebP since version 14 and AVIF since version 16.4, and by 2026 both are on every current major browser. If you are maintaining a JPG-everywhere policy because of a Safari rumour from 2019, it is long past time to revisit.
Is AVIF always smaller than WebP?
Usually, but not always — results vary with content, and AVIF can occasionally lose to a well-tuned WebP on graphics with flat colours. The honest approach is to test both on a sample of your real images rather than trusting a benchmark.
Why can't browser tools create AVIF files?
The canvas API that in-browser tools use to encode images ships encoders for JPG, PNG and WebP only. AVIF encoding requires heavyweight external code, which is why tools that offer it either run a dedicated encoder locally or upload your file to a server that does. It is a technical limit, not a conspiracy.
Do I still need a JPG fallback in 2026?
For general web use, no — WebP support is effectively universal. Keep JPG for email, for archived assets that old software must open, and as the source format you convert from.