Google PageSpeed Insights is a free performance analysis tool developed by Google that evaluates how quickly and efficiently your website loads on both desktop and mobile devices. Since site speed is a key factor for user experience and plays a role in search engine rankings, PSI is essential for web developers, marketers, and business owners looking to optimize their online presence.
The tool combines field data from real users (sourced via the Chrome User Experience Report) with lab data collected in a controlled environment using Google’s open-source auditing tool, Lighthouse. This dual perspective helps you understand how your site performs in real-world conditions and under standardized testing.
Beyond just speed, PageSpeed Insights via Lighthouse also evaluates your site’s accessibility, SEO, and overall adherence to best practices, making it a comprehensive tool for auditing and improving website quality.
After each test, PSI provides an in-depth report with performance scores, a visual breakdown of key metrics (like First Contentful Paint and Time to Interactive), and a prioritized list of actionable recommendations to improve your site’s speed and usability. It’s a valuable, no-cost resource for building faster, better-performing websites.
