GTmetrix Performance Blog
News, updates and guides on GTmetrix and general web performance
Category: Using GTmetrix
Spotlights on GTmetrix features and how to get the most out of them.
How to Customize Your User Agent in GTmetrix
Need to use a Custom User-Agent? We show you how to make use of our enhanced User Agent Override feature.
Set Default Analysis Options for GTmetrix Tests
Do you frequently test with a specific set of Analysis Options? Set your own Default Analysis Options in User Settings.
Adding Custom CDN Hostnames
If you’re sure your website uses a performant and reputable CDN, you can add the hostname to GTmetrix tests to avoid triggering the “Use a CDN” audit.
Using the GTmetrix Waterfall Chart
We’ll show you all the features of the GTmetrix Waterfall Chart in this guide.
Investigating Lighthouse Report Generation Errors
The methods described below are fairly technical and require some understanding of browser execution and Chrome DevTools.