GTmetrix Performance Blog
News, updates and guides on GTmetrix and general web performance
Author: Varun
Don’t Chase Perfect Scores
We explain why you shouldn’t chase perfect scores on GTmetrix (or any performance tool).
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.
Are You Using the Right Image Format?
In this article, we explain why using the right image format matters for web performance.
Using the GTmetrix Waterfall Chart
We’ll show you all the features of the GTmetrix Waterfall Chart in this guide.
Don’t Use Too Many Web-Fonts
We discuss the impact of using too many fonts for your website.
