Chrome DevTools is a set of web developer tools built directly into the Google Chrome browser. DevTools can help you edit pages on-the-fly and diagnose problems quickly, which ultimately helps you build better websites, faster.
With DevTools you can view and change any page. Even the Google homepage, as the video demonstrates.
DevTools for Beginners
DevTools for Beginners teaches you the fundamentals of web development as well as the basics of DevTools. Check out Get started below if you'd prefer tutorials that focus on DevTools.
If you're a more experienced web developer, here are the recommended starting points for learning how DevTools can improve your productivity:
- View and Change a Page's Styles (CSS)
- Optimize Website Speed
The DevTools UI can be a little overwhelming... there's so many tabs! But, if you take some time to get familiar with each tab to understand what's possible, you may discover that DevTools can seriously boost your productivity.
Simulate mobile devices.
- Device Mode
- Test Responsive and Device-specific Viewports
- Emulate Sensors: Geolocation & Accelerometer
View and change the DOM and CSS.
- Get Started With Viewing And Changing CSS
- Inspect and Tweak Your Pages
- Edit Styles
- Edit the DOM
- Inspect Animations
- Pause Your Code With Breakpoints
- Save Changes to Disk with Workspaces
- Run Snippets Of Code From Any Page
- Persist Changes Across Page Reloads with Local Overrides
View and debug network activity.
Find ways to improve load and runtime performance.
- Optimize Website Speed
- Get Started With Analyzing Runtime Performance
- Performance Analysis Reference
- Analyze runtime performance
- Diagnose Forced Synchronous Layouts
Profile memory usage and track down leaks.
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.
Join the DevTools community
The best place to file feature requests for Chrome DevTools is the mailing list. The team needs to understand use cases, gauge community interest, and discuss feasibility before implementing any new features.
File bug reports in Crbug, which is the engineering team's bug tracker.
If you want to alert us to a bug or feature request but don't have much time, you're welcome to send a tweet to @ChromeDevTools. We reply and send announcements from the account regularly.
For help with using DevTools, Stack Overflow is the best channel.
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 the team doesn't monitor it consistently.
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