GTmetrix tells you how your website performs, why it’s slow, and how to optimize it.
We’re relied on by the best, with over 1.3 billion pages analyzed so far.
Get started with GTmetrix for free, test your page in different locations, monitor performance, set up Alerts, configure Analysis Options, and more.
How GTmetrix Insights Works
GTmetrix breaks down your page performance in an easy‑to‑read, summarized report.
Get a detailed assessment of page performance with Lighthouse metrics and audits, Web Vitals (LCP, TBT, CLS), Real User Metrics (CrUX), various Analysis Options, Waterfall, Video, and Report History, and Speed Visualization (Filmstrip).
Get real user metrics with CrUX data and track Core Web Vitals from actual visitors coming to your website, monitoring trends as far back as 6 months to identify patterns, address issues, and continuously optimize your website.
Track your performance over time by testing your page on a schedule and keeping track of how it’s doing, visualizing historical trends on an hourly, daily, weekly, or monthly basis and seeing alerts triggered for your pages directly on the graphs.
Get notified when your page is slow by setting up an Alert and receiving notifications when your page underperforms, with links to full reports so you can see exactly what happened, including if your page fails to generate a report.
Performance, Web Vitals, and SEO
Bad performance means a bad user experience, and a slow website can impact key metrics including bounce rate, conversions, traffic, page view duration, and revenue.
Core Web Vitals are one of the key signals in Google’s search ranking algorithm, and a very poor‑performing website may not fare well in search results and can impact your revenue if fewer people are finding you.
GTmetrix Reports can tell you exactly how fast your page loads, why it’s slow, and how to fix it, by assessing Web Vitals and other Lighthouse metrics, tracking Real User Metrics with Core Web Vitals (CrUX), revealing optimization opportunities, and providing a breakdown of page composition in terms of requests and total byte size.
Structure Audits and Optimization Opportunities
Structure audits tell you if your page applies modern best practices for optimized page delivery.
You can find out if your images or other resources are too large, see which JS/CSS files are slowing down your page load, uncover page elements causing layout shifts, and discover many more problem areas for actionable performance gains.
Real User Metrics and CrUX Data
Using data from the Chrome User Experience Report (CrUX), you can see exactly how real users experience your page load, including metrics on real user experiences such as LCP, INP, CLS, and more from the CrUX dataset.
The CrUX data collection period is 28 days, and you can track history as far back as 6 months, with CrUX data available for websites that have sufficient Chrome web traffic.
Global Performance and Multiple Test Scenarios
Assess worldwide performance by testing your page in 7 global test locations for free, and upgrade to GTmetrix PRO to access 15 additional Premium Test Locations.
Track performance changes by automatically testing a page on a Daily, Weekly, or Monthly basis for trend analysis and historical tracking, with graphs of your performance history on Web Vitals and other Lighthouse metrics, GTmetrix Grade, Performance / Structure Scores, and HTML / Total Page Size plus number of requests.
See how your page loads request by request with Waterfall Charts, identifying long or broken requests at a glance, understanding what the browser sees when loading your page, and viewing detailed request information like CDN cache status, IP, and more.
Test your page in multiple scenarios by setting up Alerts, blocking ads in tests to see their impact, watching video playback of your page load, and using connection throttling to test with multiple connection speeds and see how your page loads for different kinds of visitors.
GTmetrix PRO Features
Unleash the full potential of GTmetrix by going PRO, getting all the features of the Basic plan plus Mobile Testing, Premium Test Locations, and more of everything GTmetrix has to offer.
- Mobile Testing on 40+ Devices: Optimize your website for mobile users with 40+ simulated devices and variants, including iPhones, Galaxies, Pixels, and more, with mobile connection throttling (4G, LTE, or custom speed) and the ability to monitor mobile performance globally.
- 15 Additional Premium Test Locations Worldwide: In addition to the 7 global locations, PRO users get access to 15 Premium Test locations across North America, Europe, Asia Pacific, the Middle East, and Africa.
- Hourly Monitoring: Get a finer‑grain pulse on your performance with hourly monitoring, helping you uncover spikes or dips faster and maintain your clients’ websites by monitoring performance and being alerted in case of issues.
- 6‑Month CrUX Data: With 6‑month historical CrUX data, uncover trends, track long‑term improvements, and analyze seasonal patterns from real users of your website.
- Unlimited Tagging and Filter Tabs: Create as many tags and filter tabs as you need to categorize and find desired reports quickly and efficiently.
- More Analysis Options: Specify screen resolution, use custom connections to match your visitors’ conditions, extend data retention for better historical insights, bulk‑add global notes to multiple report histories, and use custom DNS and custom User Agent (UA) for testing dev/staging environments.
- Plus These Benefits: Get more On‑Demand Tests, Monitored Slots, and API credits, benefit from highest queue priority, use global monitoring and API capability, access even more history visualization and queue concurrency, download full PDF Report files, and receive GTmetrix product and API support.
