Make your web pages fast on all devices

PageSpeed Insights (PSI) is a free developer tool that reports on the user experience of a page on both mobile and desktop devices, and provides suggestions on how that page may be improved.

A PageSpeed score of 90 or above is considered good, 50 to 89 needs improvement, and under 50 is poor. Lighthouse calculates this score based on performance metrics such as FCP, LCP, TBT, and CLS.

When your analysis succeeds, click the 'Download PDF' button in the report headers. It reformats the report for print compatibility, displaying all audit metrics simultaneously.