GTmetrix is a free tool to test and monitor your page's performance. Using Lighthouse, GTmetrix generates scores for your pages and offers actionable recommendations on how to optimize them.

"I use this tool almost every day, GTmetrix is now my 1st choice of all speed testing tools." — Torikul, Freelance Developer

Learn how to keep track of your site performance over time and extract more value from GTmetrix. The following guides will guide you on setting up monitoring, configuring Alerts, utilizing History Graphs, …

"If a metric has gone above a certain threshold, we can get an alert so we can be proactive for our clients — GTmetrix helps us find performance problems before Google notices!"

Yes - GTmetrix PRO is a subscription service. You'll be charged the cost of your plan at the end of your billing term (every month or year depending on what you've selected).

GTmetrix displays the calculated Speed Index in seconds, with a lower time representing a faster loading webpage. SI thresholds are, as follows: Good - nothing to do here = SI of 1311 milliseconds …

GTmetrix uses a real browser to load your page in its entirety, and then audits the data using Google Lighthouse. A report is generated containing performance data, insights, and actionable …

GTmetrix offers detailed explanation of best practice speed optimizations as well as our own recommendations.

GTmetrix utilizes specially customized software to simulate any kind of connection. We do this by putting limits on our fibre connection's download speed, upload speed and latency.

With Lighthouse as the foundation, a new algorithm for GTmetrix scoring was created, introducing a new GTmetrix Grade, alongside new Performance and Structure scores.