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Lossless compression ratio and encoding speed.

Lossy compression metrics.

Comparison between AOM AVIF version 3.1.1 and AOM AVIF 20210715.

Comparison between JPEG XL version 0.3.7 and JPEG XL 20210715.

Comparison between WebP2 20201204 and WebP2 20210715.

Full methodology.


Large images were first encoded with Mozjpeg at q85 filesizes. Big is 125% of Large. Medium is 60% of Large. Small is 60% of Medium. Tiny is 60% of Small. Everything else was matched to +/- 5% filesize.

All the pictures have been compressed from RGB PNGs.

Use Shift to swap images.

This page is based on Xiph.org's Daala comparison page. Originally developed by xooyoozoo. A list of sources for the images can be found in this text file.

Last updated: July 2021.