The PageSpeed Insights Checker for Mobile is a free Chrome add-on that allows users to quickly check the Mobile PageSpeed score for any webpage. With this handy tool, users can easily assess the performance of their mobile websites or any other webpage they visit.

This add-on sends each page you visit to the Page Speed Insights API, which performs a comprehensive analysis of the page. It then provides you with a detailed report on the Mobile PageSpeed score, allowing you to identify any performance issues that may be affecting the user experience.

One of the key features of the PageSpeed Insights Checker for Mobile is the handy preview it offers. This allows users to quickly view how their webpage appears on a mobile device, giving them valuable insights into its mobile-friendliness and overall design.

The latest update of this add-on introduces the option to set your own API key, giving users more control over the analysis process. This customization feature enhances the flexibility and functionality of the add-on, allowing users to tailor it to their specific needs.

Overall, the PageSpeed Insights Checker for Mobile is a valuable tool for web developers, designers, and anyone interested in optimizing their mobile websites for better performance. With its easy-to-use interface and comprehensive analysis, it provides users with the necessary information to improve their mobile web presence.