PageSpeed Insights is available as an open-source browser extension for Google Chrome. Webmasters and web developers can use PageSpeed Insights to evaluate the performance of their web pages and to get suggestions on how to improve them.
PageSpeed Insights performs several tests on a site's web server configuration and front-end code. These tests are based on a set of best practices known to enhance web page performance. Webmasters who run PageSpeed Insights on their pages get a score for each page, as well as suggestions on how to improve its performance. By following the suggestions you can make your site faster, keep Internet users engaged with your site, reduce your bandwidth and hosting costs and improve the web!
PageSpeed generates its results based on the state of the page at the time you run the tool. To ensure the most accurate results, you should wait until the page finishes loading before running PageSpeed. Otherwise, PageSpeed may not be able to fully analyze resources that haven't finished downloading.
To profile a page with PageSpeed, open the web page in Google Chrome. Then take the following actions:
Select the Wrench menu at the top-right of your browser window, then select Tools -> Developer tools.
In Chrome Developer Tools, click the PageSpeed tab to display the PageSpeed welcome screen.
- Navigate to the web page you want to analyze. Wait until the page finishes loading.
Click Analyze. When the page is analyzed, PageSpeed displays the list of web performance best practices on the left-hand side, sorted by importance/priority for the page being analyzed.
Click on any of the rules to see specific suggestions for improvement.
Understanding PageSpeed performance scores
For each rule, PageSpeed gives specific suggestions for improvement. PageSpeed also gives the page an overall numeric score that indicates how much room for improvement there is for the current page. A high score indicates little room for improvement, while a lower score indicates more room for improvement.
To uninstall PageSpeed:
- In Chrome, select the Wrench menu at the top-right of your browser window, then select Tools -> Extensions.
- In the window that appears, select PageSpeed and click Uninstall.
- Restart Chrome.