Site Speed Insights: Web Vitals Visualizer is a Chrome add-on designed for developers and performance auditors to effectively analyze and visualize Core Web Vitals such as LCP, INP, CLS, FCP, and TTFB in real time. This tool provides interactive overlays that highlight layout shifts, input delays, and paint timings, allowing users to pinpoint the causes of performance issues directly within the web page. With its intuitive interface, users can easily understand the metrics that impact their website's performance.

In addition to real-time tracking, the add-on offers field performance insights through the Chrome UX Report (CrUX), allowing users to compare live page behavior with real-user data. This tool operates seamlessly on any website without collecting data, ensuring that all analysis is conducted locally. It is particularly beneficial for front-end engineers, UX developers, performance auditors, and QA testers looking to enhance their website's performance.