GTmetrix Performance Blog
News, updates and guides on GTmetrix and general web performance
How to properly size images
Learn how to properly size images on your website for optimal performance.
How to Simulate Devices with GTmetrix
GTmetrix now allows you to test your page’s performance on them by modifying the screen resolution, user agent and device pixel ratio to each device’s technical specifications.
How to Optimize Images: A Practical Guide
Want to know how to Serve Scaled Images and Optimize Your Images? We’ll show you how!