Find out why your website is slow

Then fix it

GTmetrix tests your AI-Built website and shows you exactly how to optimize for performance.

Is your AI-Built website fast enough?

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Deep Insights to Understand and Optimize Performance

Go beyond simple performance scores with detailed analysis and a breakdown of your page load.

Get Started for FREE (No credit card required)

Web Vitals

Track Google Core Web vitals automatically. Measure the metrics that impact your SEO.

Advanced Analysis

Customize your connection speed, user agents, resolution, and cookies.

Monitoring and Alerts

Test your pages on a set schedule. Receive instant notifications when performance drops.

Waterfall Charts

See how your site loads request-by-request. Pinpoint large files and slow server responses.

Real User Metrics

Get real-world performance with CrUX data. See how actual users experience your site.

Global Testing Network

Test performance across 25 global regions. See how international visitors experience your site.

1. Test

Gain a clear, complete view of your site’s real performance

Go beyond a single score. See exactly what’s slow, why it’s slow, and what to fix first.

  • Full Lighthouse-powered reports with Web Vitals (LCP, TBT, CLS) and structure audits
  • Real User Metrics from CrUX data — see how actual visitors experience your site, not just a lab test
  • Waterfall, video, and filmstrip views to pinpoint the exact request or script causing the slowdown
  • Test the way your visitors actually experience your site
    • 25 global test locations, from Seattle to Sydney, to catch regional slowdowns
    • 55+ simulated mobile and tablet devices (iPhone, Galaxy, Pixel, and more)
Start Testing for FREE

Catch performance problems before your users do

Schedule recurring tests and get alerted the moment something regresses.

  • Hourly, daily, weekly, or monthly automated testing with historical trend graphs
  • Instant alerts by email when a page slows down or fails to load
  • Track Web Vitals, GTmetrix Grade, and/or page size and requests over time to catch performance bloat
How to Set Up Monitoring

Bring performance data into your team’s workflow

Performance isn’t a solo job — give devs, marketers, and clients the same source of truth.

  • Team Logins with role-based access (Owner, Administrator, Tester, Viewer) on one shared dashboard
  • CSV export — single-page or bulk across your whole portfolio — for dashboards and reporting
  • Shareable report links and PDF exports for stakeholders and clients
Explore Team Features

Bring performance data straight into your AI workflow

Fast to Build Isn’t the Same as Fast to Load

  • AI tools are good at shipping features quickly – but they’re not necessarily optimized for performance.
  • Continuous iteration often brings more pages, widgets, and polish, increasing bloat and worsening performance.
  • Connecting GTmetrix MCP to your AI tool brings real-world assessment from real page loads, in real locations around the globe.

Ask in plain language. Get real data, right in your chat.

  • Connect GTmetrix MCP to any AI coding tool – Claude, Cursor, GitHub Copilot CLI, ChatGPT, Lovable, and more – no dashboard required
  • Ask questions like “Why is my LCP slow?” and get a real, specific answer pulled from actual GTmetrix test data
  • Apply a fix, then rerun the test in the same conversation to confirm it worked, without switching tools or tabs
More on Testing AI -Built Sites

World map showing GTmetrix’s 25 global test locations, with a bright, multi-ring pulse that radiates outward from one location at a time, cycling in a randomized order around the globe.

Leverage Real World Testing Across the Globe

25 test locations across 6 continents worldwide.

See how your site actually performs for visitors wherever they are.

Start Testing Globally

Trusted since 2010

GTmetrix is used by developers, marketers, hobbyists, agencies, small businesses, enterprises, and more

GTmetrix’s detailed reports have been invaluable for tracking progress and maintaining high performance standards.

Simon Harvey

Developer at Lisia Digital

GTmetrix helped us cut load times by 30%. We’ve also seen a 15% boost in conversions, which is pretty awesome!

Deepak Shukla

CEO at Pearl Lemon Agency

GTmetrix Monitoring and Alerts are essential to protecting our clients from avoidable performance regressions.

Lior Krolewicz

PPC Expert and Founder at Yael Consulting

One of the many benefits of GTmetrix is the control offered by its testing environment, making it more consistent and reliable than other tools.

Scott Carter

Founder at Barrell Roll

GTmetrix MCP bridges the gap between identifying a performance issue and having an AI agent instantly write the code to fix it.

Sabir Semerkant

Founder at Growth by Sabir