See the difference
Codec debates end faster with pixels and numbers on the same page. Every comparison here is a real encode you can drag a slider across, with the methodology stated and the pipeline in the open.
JPEG vs WebP vs AVIF vs JPEG XL Four image formats, one byte budget. Drag the slider; the metrics are underneath. AV1 vs H.264 The same clip at the same bitrate, two codec generations apart. VMAF-scored, H.265 measured alongside. What your browser decodes A live probe of the browser you are using right now: image formats, playback, WebCodecs.
Want to run the encoders yourself? The image lab encodes your own files live in your browser.