The Chrome DevTools are a set of web authoring and debugging tools built into Google Chrome. Use the DevTools to iterate, debug, and profile your site.
- Select More Tools > Developer Tools from Chrome's Main Menu.
- Right-click a page element and select Inspect.
- Press Command+Option+I (Mac) or Control+Shift+I (Windows, Linux).
Build fully responsive, mobile-first web experiences.
- Device Mode
- Test Responsive and Device-specific Viewports
- Emulate Sensors: Geolocation & Accelerometer
Iterate on the layout and design of your site by freely manipulating the DOM and CSS.
- Pause Your Code With Breakpoints
- Set Up Persistence with DevTools Workspaces
- Run Snippets Of Code From Any Page
Optimize page load performance and debug request issues.
Performance panel (previously Timeline panel)
Improve the runtime performance of your page by recording and exploring the various events that happen during the lifecycle of a site.
- Get Started With Analyzing Runtime Performance
- How to look at performance
- Analyze runtime performance
- Diagnose Forced Synchronous Layouts
Memory panel (previously Profiles panel)
Profile memory usage and track down leaks.
Application panel (previously Resources panel)
Inspect all resources that are loaded, including IndexedDB or Web SQL databases, local and session storage, cookies, Application Cache, images, fonts, and stylesheets.
- Debug Progressive Web Apps
- Inspect and Manage Storage, Databases, and Caches
- Inspect and Delete Cookies
- Inspect Resources
Debug mixed content issues, certificate problems, and more.
The best place to file bug reports and feature requests for Chrome DevTools is Crbug, which is the master tracker for the DevTools engineering team.
For quick bug reports or feature requests, send a tweet to @ChromeDevTools. Ultimately, somebody converts your tweet to an issue on Crbug, so you can file the Crbug issue yourself if you want to ensure that it gets addressed by the DevTools engineering team.
For help with using DevTools, Stack Overflow or the mailing list are the best channels.
To file bugs or feature requests on the DevTools docs, open a GitHub issue on the Web Fundamentals repository.
DevTools also has a Slack channel, but it doesn't get much activity.