WEBP vs AVIF: Next-Gen Image Formats Compared

Quick answer: AVIF compresses smaller, but WebP is safer for compatibility. If your audience is mostly on modern browsers, go AVIF. If you need something that works everywhere right now, WebP is still the smarter default.

Why JPEG and PNG Aren't Enough Anymore

For twenty-plus years, JPEG and PNG did the heavy lifting. They still work — but they were not built for how fast people expect pages to load today. Google's Core Web Vitals put real weight on image load time. A bloated hero image can single-handedly tank your Largest Contentful Paint score.

What Is WebP?

WebP was released by Google in 2010. It supports lossy and lossless compression, transparency, and animation. Browser support is excellent in every major browser today — Chrome, Firefox, Safari, Edge. Typical savings: 25–35% smaller than JPEG at equivalent quality, and often 50%+ smaller than PNG for graphics with transparency.

What Is AVIF?

AVIF is built on the AV1 video codec (around 2019). It regularly beats WebP by another 20–30% at the same visual quality. The catch: tooling and encoding speed still lag slightly behind WebP, and some older CMS setups do not handle AVIF cleanly yet.

WebP vs AVIF: Direct Comparison

- File size — AVIF usually wins on photographic images - Browser support — WebP wins with broader compatibility - Encoding speed — WebP wins; AVIF compression takes longer - Transparency — both handle it well - Animation — both support it; WebP tooling is more mature - Quality at low bitrates — AVIF holds detail better when pushed hard

Real-World File Size Test

Same 2400px landscape JPEG (3.1MB original): WebP at 780KB, AVIF at 540KB — AVIF about 30% smaller. The gap holds for photo-style content and narrows for simple graphics.

- You need guaranteed compatibility across every browser today - Encoding speed matters for high image volume - Your CMS or plugin ecosystem supports WebP natively - You want a stable, predictable format

- Every kilobyte matters and your audience uses modern browsers - You optimize photography-heavy or portfolio sites - Your build pipeline or CDN supports AVIF delivery

Best Practice: Use Both With Fallbacks

The HTML picture element lets you offer AVIF first, fall back to WebP, then JPEG. Browsers grab the best format they support. This is the recommended approach for most sites in 2026.

- Check analytics for what browsers your visitors actually use - Test both formats on your 3–5 heaviest images - Confirm your hosting can serve AVIF if you choose it - Set up a picture fallback chain rather than betting on one format - Re-test PageSpeed Insights after switching

Convert between formats free on SUHADIMG: WebP to JPG, AVIF to JPG, and PNG to WebP. AVIF is the better format on paper; WebP is the safer battle-tested choice — use both with fallbacks and you get the best of each.

Test both formats on your heaviest images using SUHADIMG: WebP to JPG, AVIF to JPG, and PNG to WebP. Measure PageSpeed Insights before and after switching hero images.