Free tool
Webflow Speed Checker
Paste a page address and see what slows it down, with fixes written for Webflow, not generic advice.
Your PageSpeed API key (optional)
How to read it
What the numbers mean.
Start with mobile
Google ranks on the mobile result, and phones are where slow pages hurt most.
Real visitors win
Field data from the last 28 days matters more than a single lab score. Use the lab score to find causes.
Fix the top items first
The first two or three fixes usually do most of the work. You rarely need to chase a perfect 100.