Free
WebPageTest
Advanced web performance testing with real browsers from real global locations.
4.64.6 out of 5 stars18,000 reviews
WebPageTest is a free open-source web performance testing tool that runs tests using real browsers from locations worldwide. It provides detailed waterfall charts filmstrips and Core Web Vitals data for deep performance diagnosis.
Real Browser TestingWaterfall AnalysisCore Web VitalsFilmstrip ViewVideo CaptureAPI
Starting price
Free
Free plan available
Overall4.6
Ease of Use3.8
Value for Money5.0
Features4.9
Support3.5
Pros & Cons
✓Pros
- ✓More detailed than GTmetrix or PageSpeed Insights
- ✓Real browser testing from real locations
- ✓Filmstrip view shows visual loading progression
- ✓Open-source and free
✕Cons
- ✕Very technical — steep learning curve
- ✕Can be slow to run tests
- ✕Not beginner-friendly
Best For
- ◆Performance engineers and developers
- ◆SEO professionals doing deep audits
- ◆Agencies comparing before and after optimisations