Chrome DevTools is a set of web developer tools built directly into the Google Chrome browser. DevTools lets you edit pages on-the-fly and diagnose problems quickly, which helps you build better websites, faster.
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DevTools supports a wide range of common web development tasks. Jump ahead on this page and explore some of DevTools' key features. Don't know where to start or your first time using DevTools? Watch an intro to DevTools.
Console insights and AI assistance help you debug and fix JavaScript errors, performance, and styling more efficiently.
Get a comprehensive and actionable view of your page's performance.
Learn how to inspect resources loaded by your page and edit them from your browser.
Analyze and overwrite network requests and responses on the fly.

AI assistance & console insights

Explore how AI innovations in DevTools let you do more, faster.
Let Gemini help you analyze and improve your website's styling, network, sources, and performance.
Explore use cases for AI assistance in Chrome DevTools and learn how it can support your debugging workflow across styling, performance, and more.
Understand console messages and errors in DevTools and learn how to fix them - without any copy-pasting.

Developer Tooling Tips

Explore our monthly video series taking you through common debugging scenarios in DevTools in a playful way.
Get a tour through the updated Performance panel, showing you how to measure Core Web Vitals (LCP, CLS, INP) and how to get tailored advice from Gemini.
Set sail with DevTools and become a debugging pirate! Discover techniques for emulating focus styles, testing forms with autofill, and resolving backend errors with network overrides.
Explore the power of Al-assisted debugging with Chrome DevTools! Discover how Console Insights, Al assistance for styling, performance, network, and sources can supercharge your workflow.
Explore advanced Network panel techniques, including how to find performance bottlenecks, debug popups, configure network conditions, use shortcuts to determine network request initiators and more.

Get performance insights

A wide range of tools to help you measure and optimize different aspects of your runtime performance: the Performance panel, Lighthouse, and more.
Learn about all the features in the Performance panel: how to record a performance trace, how to view and analyze the trace, and more.
Learn about new DevTools features like CPU throttling calibration to help you base your performance debugging decisions on data from the real world
Learn about the new performance insights, the power of Lighthouse directly in the DevTools Performance panel.

News & updates

Inspect and edit resources

Learn about all the features in the Sources panel: how to view and edit files, debug JavaScript, and set up a workspace.
Get started
Workspace lets you to save changes that you make within DevTools to source code that's stored on your computer. Learn how to set up a workspace in your own projects.
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Analyze network activity

Learn about all the features in the Network panel: inspect response and request bodies, overwrite headers, and more.
Get started
A hands-on tutorial to guide you through common tasks inside the Network panel.
Read tutorial

More tools

Discover all the other features and capabilities in DevTools.
Learn how to view and change a page's DOM.
Learn how to view and change a page's CSS.
Track changes to HTML, CSS, and JavaScript.
Log messages and run JavaScript.
Evaluate website performance.
Find memory issues that affect page performance, including memory leaks, and more.
Inspect, modify, and debug web apps, test cache, view storage, and more.
Inspect and modify animations.
Record, replay, measure user flows, and edit their steps.
Discover a collection of options that affect web content rendering.
Inspect and debug saved addresses.
Find and fix problems with your website.
Make sure that a page is fully protected by HTTPS.
View information and debug media players per browser tab.
Emulate device sensors.
Emulate authenticators.