JPEG XL vs. AVIF for web use-cases

AVIF consistently produces smaller files than JPEG XL for lossy web photos, typically 15-25% smaller at default settings and 6-20% smaller at maximum effort, though JPEG XL performs better with progressive encoding. For screenshots, illustrations, and images with transparency, AVIF significantly outperforms JPEG XL by 20-90% depending on settings. AVIF also decodes faster than JPEG XL, though encoding speed and memory usage vary depending on the encoder used.