Webpagetest
WebPageTest is a free open-source tool for testing and analyzing website performance from real browsers and locations worldwide.
Score
30
User Rating
3.0
Free/Trial Support
Supported
Starting Price
--
Last Updated
Oct 01, 2026
Overview
What is Webpagetest?
WebPageTest is a widely used web performance testing platform that measures page load speed, Core Web Vitals, and rendering behavior using real browsers running on real or emulated connections from multiple global locations. It provides detailed waterfall charts, filmstrips, and optimization grades to help developers diagnose and improve site performance.
What is Webpagetest used for?
Top Features
- Real browser testing from multiple global locations
- Detailed waterfall charts and filmstrips
- Core Web Vitals and performance metrics
- Connection throttling and device emulation
- Public API for automation
- Private instance and self-hosted options
- Comparison and historical test results
- Optimization grades and recommendations
How to use Webpagetest?
Enter your website URL on webpagetest.org, choose a test location, browser, and connection profile, then run the test. Review the waterfall chart, filmstrip, and performance metrics to identify bottlenecks. You can also use the public API or run private instances for automated testing.
Alternative Tools
No alternative tools found
Pros & Cons
Pros
- Free and open-source
- Tests from real browsers and real locations
- Highly detailed performance diagnostics
- Strong API and automation support
- Trusted industry standard
Cons
- Interface can be technical for beginners
- Public instance may have test queues
- Requires interpretation of complex metrics
Use Cases
- Measuring website load performance
- Debugging slow page rendering
- Monitoring Core Web Vitals
- Comparing performance across regions
- Automating performance regression tests in CI/CD
Webpagetest Pricing
Free Plan
No detailed pricing information available
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