Webpagetest
WebPageTest is a free open-source tool for testing and analyzing website performance from real browsers and locations worldwide.
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Webpagetest āĻā§?
Webpagetest is a tool for web-performance-tool.
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- 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
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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.
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- Free and open-source
- Tests from real browsers and real locations
- Highly detailed performance diagnostics
- Strong API and automation support
- Trusted industry standard
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- Interface can be technical for beginners
- Public instance may have test queues
- Requires interpretation of complex metrics
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- Measuring website load performance
- Debugging slow page rendering
- Monitoring Core Web Vitals
- Comparing performance across regions
- Automating performance regression tests in CI/CD
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