I compressed 100 photos through 3 formats. Here's the actual data.

A 2MB JPEG photo. Convert it to WebP — now it's 480KB. Convert it to AVIF — now it's 310KB.

Same visual quality. Three different file sizes.

I've spent the last 2 weeks building an image compression tool, so I've seen thousands of these comparisons. Here's what the numbers actually say, and what it means for your website.

The Setup