GTmetrix Performance Blog
News, updates and guides on GTmetrix and general web performance
Whitelist or Blacklist URLs in your tests!
Blacklisting useful for excluding 3rd-party scripts such as Facebook like/share widgets, Google Analytics scripts, Youtube embeds and any other external widgets you might want to be not be part of your page load.
Mobile Testing Now Available
We’re proud to offer page testing through Android-powered mobile devices.
Simulate Different Connection Speeds for Loading Your Page
You can now change the connection speed GTmetrix uses to analyze your page to simulate up to 5 different connections.
Get an Alternate View of Your Page Load With Filmstrip
Visualizing how your page loads is a difficult task. HAR files are too technical for some, and video playback is difficult to dissect (often a page goes from a blank screen to a complete page in a split second).
UI Changes
We’ve done a bit of clean up to our settings and options pages to make it easier and more logical to find the features you want.
Recent Posts
-
GTmetrix Bookmarklet – Start a Test from your Bookmarks Bar!
-
Throttling updates and CDN additions
-
How to test with Custom Connection Speeds with GTmetrix
-
Black Friday/Cyber Monday 2017: Performance Blips and Blunders of Top Online Retailers
-
Meltdown/Spectre & GTmetrix: How patched servers affected us – and potentially you.