You must have JavaScript enabled to use GTmetrix

GTmetrix requires JavaScript to function properly. Please enable JavaScript in your browser and refresh the page to ensure the best GTmetrix experience.

Features
- Why GTmetrix?
  
  Learn how GTmetrix can help you uncover performance issues and features to kick-start your optimization journey.
  Explore GTmetrix features
- Get Started for FREE
  
  Take GTmetrix for a test drive and kick start your web performance optimization journey.
  See what you get with GTmetrix
- Why Go GTmetrix PRO
  
  Level-up your performance optimization and testing capabilities with GTmetrix PRO.
  Discover the full potential of GTmetrix PRO
Pricing
Resources
- Resources
  
  Get a curated collection of web performance best practices and guides.
  View Resources
- Metrics & Audits
  
  Learn more about the metrics and audits seen on your GTmetrix Report.
  View Metrics & Audits
- Using GTmetrix
  
  Spotlights on GTmetrix features and how to get the most out of them.
  View GTmetrix Guides
Blog

Tag: responsive

How to Simulate Devices With GTmetrix

Using GTmetrix / March 18, 2026

GTmetrix allows you to test your page’s performance on mobile by modifying the screen resolution, user agent, and device pixel ratio to each device’s technical specifications.