Konvertr.com
All tools2026-03-15
A practical comparison of AVIF and WebP image formats covering compression, browser support, quality, and when to use each one.
If you're shipping images on the web in 2026, you've probably heard of both AVIF and WebP. They both beat JPEG and PNG on file size. But they're not interchangeable, and picking the right one depends on what you're building.
AVIF uses the AV1 video codec under the hood, which means it benefits from years of video compression research. In most benchmarks, AVIF produces files 20-30% smaller than WebP at the same visual quality. That gap is even bigger for photos with lots of detail and color gradients.
WebP still beats JPEG and PNG by a wide margin. But if raw compression is your top priority, AVIF is the clear winner.
Here's the tradeoff. AVIF encoding is slow. Really slow compared to WebP. If you're converting thousands of images in a build pipeline, AVIF can add significant time to your process. WebP encodes quickly, which makes it a better fit for on-the-fly image processing.
For static sites where you convert once and serve forever, the encoding speed doesn't matter much. For dynamic image services, it matters a lot.
WebP has near-universal support in 2026. Every modern browser handles it without issues. AVIF support is also strong now, with Chrome, Firefox, Safari, and Edge all on board. The days of worrying about AVIF compatibility are mostly over.
That said, if you need to support older browsers or niche environments, WebP is the safer choice. You can also use the picture element to serve AVIF with a WebP fallback.
Both formats support transparency (alpha channels) and animation. AVIF supports HDR and wide color gamuts, which makes it better for photography and high-end visuals. WebP handles these basics well but doesn't go as deep on color science.
For most web use cases like product images, blog graphics, and UI screenshots, you won't notice a quality difference between the two at comparable file sizes.
Use AVIF when: You want the smallest possible files, you're serving photos or detailed graphics, you can afford slower encoding, and you don't need to support very old browsers.
Use WebP when: You need fast encoding, you want broad compatibility without fallbacks, or you're processing images on the fly.
Use both: Serve AVIF as the primary format with WebP as fallback using the HTML picture element. This is the best approach for most production sites.
You can convert images to both formats right here on Konvertr. The conversions run entirely in your browser, so your files stay private. Try converting the same image to both formats and compare the file sizes yourself.