PerfLens is a powerful web performance auditing extension designed for Chrome users, particularly beneficial for developers, founders, and product teams. This free add-on provides detailed performance metrics, including live Core Web Vitals and a comprehensive performance score ranging from 0 to 100. Users can easily identify performance bottlenecks with resource diagnostics, accessibility checks, and prioritized optimization suggestions, making it a valuable tool for improving website efficiency.

This extension allows users to monitor critical metrics like LCP, CLS, INP, and more, while also checking for common accessibility issues. With features like performance history tracking and a DevTools panel for in-depth audits, PerfLens streamlines the debugging process. By integrating performance feedback directly into the browsing experience, it simplifies the task of preparing for launches and enhancing user experience on both desktop and mobile platforms.