Overview
GTmetrix tests page speed and shows a detailed waterfall of every request, along with Web Vitals and recommendations. Paid plans add scheduled monitoring, more test locations and alerts.
Who it's for
Developers diagnosing exactly what slows a page down.
Key features
- Waterfall charts
- Web Vitals
- Test locations
- Monitoring & alerts
- Video playback
Pros
- Detailed waterfall
- History and monitoring
- Easy to share
Cons
- Best features are paid
- Lab data only
GTmetrix alternatives
See all 3Google Search Console
SEO audit tools
Google's own data on how your site performs in search.
FreeTop pick
Lighthouse
Page speed & Core Web Vitals
Open-source audit for performance, accessibility and SEO basics.
Free
PageSpeed Insights
Page speed & Core Web Vitals
Google's free test for Core Web Vitals and page speed.
Free