Blog · WebP, PNG, and image performance

Performance · 8 min read

WebP vs PNG: real-world page speed tests

Concrete numbers from 50 image swaps across 3G, 4G and Wi-Fi — plus what it did to LCP.

Deep dive · 6 min read

How the two formats actually compress data, where each one wins, and when you should keep PNG.

Intro · 4 min read

Three concrete reasons WebP keeps replacing PNG and JPEG, and what it takes to roll it out.

How-to · 5 min read

Three battle-tested workflows: the in-browser route, cwebp, and a one-line shell loop.

SEO · 6 min read

Image format is one input to LCP. Here's a clear hierarchy of what to fix first if you want a green Lighthouse score.

Reference · 4 min read

Everything that supports WebP in 2025, and the right HTML for the few that don't.