Chrome DevTools Documentation

Chrome DevTools is a comprehensive set of web developer tools built directly into the Google Chrome browser, and its official documentation provides in-depth guides for every panel and feature. The Elements panel allows real-time inspection and live editing of HTML and CSS, the Console serves as an interactive JavaScript REPL for debugging and logging, and the Sources panel enables stepping through code with breakpoints, watch expressions, and call stack inspection. The Network panel logs every HTTP request with timing waterfalls, headers, cookies, and response payloads to help diagnose load performance issues. The Performance panel records runtime profiles to identify rendering bottlenecks, layout thrashing, and long tasks. Modern additions include the Lighthouse audit engine for performance, accessibility, SEO, and best-practice scoring, the Recorder panel for automated user-flow testing, the Memory panel for heap snapshot comparisons, and the Application panel for inspecting local and session storage, IndexedDB, service workers, cache storage, and progressive web app manifests. Every tool also supports CSS grid and flexbox overlay debugging.