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 Use Tags
We’ve written an in-depth guide on organizing your GTmetrix Reports with Tags.
How to Add Global Notes
Need to bulk add notes to History Graphs on multiple GTmetrix Reports? Now, you can with Global Notes!
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
Last Updated: April 13, 2026 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.
