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.
Ask questions or give feedback about DevTools (or these docs) in any of the channels below.