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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.
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Don’t Chase Perfect Scores
We explain why you shouldn’t chase perfect scores on GTmetrix (or any performance tool).
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Lighthouse 8.3.0 Update
We’ve upgraded GTmetrix to Lighthouse 8.3.0 – read on for changes that come with this release.
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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.
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Are You Using the Right Image Format?
In this article, we explain why using the right image format matters for web performance.
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Using the GTmetrix Waterfall Chart
We’ll show you all the features of the GTmetrix Waterfall Chart in this guide.
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Don’t Use Too Many Web-Fonts
We discuss the impact of using too many fonts for your website.
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Yet Another Quick Release
Another quick recap of our recent release.
