- Article
DevTools provides more than 30 tools:
- Two icons on the Activity Bar, for the Inspect tool (
) and Device Emulation (). - Three permanent tool tabs on the Activity Bar, for the Elements, Console, and Sources tools.
- Optional tabs, for optional tools such as the Welcome and Network tools.
- More optional tools, on the More tools () menu, such as the 3D View and Detached Elements tools.
) and Device Emulation (
).
) menu, such as the 3D View and Detached Elements tools.
The following features are additional ways to access the tools:
- The Quick View panel is an additional toolbar and area to hold tools, below or to the right of the Activity Bar panel.
- The Command Menu is a way to directly use features of tools.
- The Settings pages can turn on additional features of tools.
Microsoft Edge DevTools includes the following tools.
| Tool | Purpose | Article |
|---|---|---|
| 3D View tool | Explore the web page translated into a 3D perspective. Debug your webpage by navigating through the DOM or z-index stacking context. | Navigate webpage layers, z-index, and DOM using the 3D View tool |
| Animations tool | Inspect and modify CSS animation effects by using the Animation Inspector in the Animations tool. | Inspect and modify CSS animation effects |
| Application tool | Use the Application tool to manage storage for web app pages, including manifest, service workers, local storage, cookies, cache storage, and background services. | The Application tool, to manage storage |
| Changes tool | Tracks any changes you've made to CSS or JavaScript in DevTools. Shows you what changes to make to your actual source files after you use DevTools to modify your webpage files sent from the server. | Track changes to files using the Changes tool |
| Console tool | An intelligent, rich command line within DevTools. A great companion tool to use with others tools. Provides a powerful way to script functionality, inspect the current webpage, and manipulate the current webpage using JavaScript. | Console overview |
| Coverage tool | Help you find unused JavaScript and CSS code, to speed up your page load and save your mobile users cellular data. | Find unused JavaScript and CSS code with the Coverage tool |
| CSS Overview tool | Help you better understand your page's CSS and identify potential improvements. | CSS Overview tool |
| Detached Elements tool | To increase the performance of your page, this tool finds detached elements that the browser cannot garbage-collect, and identifies the JavaScript object that is still referencing the detached element. By changing your JavaScript to release the element, you reduce the number of detached elements on your page, increasing page performance and responsiveness. | Debug DOM memory leaks with the Detached Elements tool |
| Developer Resources | Shows resource URLs for the webpage. | Developer Resources tool |
| Device Emulation | Use the Device Emulation tool, also called Device Simulation Mode or Device Mode, to approximate how your page looks and responds on a mobile device. | Emulate mobile devices (Device Emulation) |
| Elements tool | Inspect, edit, and debug your HTML and CSS. You can edit in the tool while displaying the changes live in the browser. Debug your HTML using the DOM tree, and inspect and work on the CSS for your webpage. | Inspect, edit, and debug HTML and CSS with the Elements tool |
| Inspect tool | Use the Inspect tool to see information about an item within a rendered webpage. When the Inspect tool is active, you hover over items in the webpage, and DevTools adds an information overlay and grid highlighting on the webpage. | Analyze pages using the Inspect tool |
| Issues tool | The Issues tool automatically analyzes the current webpage, reports issues grouped by type, and provides documentation to help explain and resolve the issues. | Find and fix problems using the Issues tool |
| JavaScript Profiler tool | This tool has been replaced by the Performance tool and the Memory tool. | JavaScript Profiler tool |
| Lighthouse tool | Use the Lighthouse tool to identify and fix common problems that affect your site's performance, accessibility, and user experience. | Lighthouse tool |
| Media tool | Use this tool to view information and debug the media players per browser tab. | View and debug media players information |
| Memory tool | Find memory issues that affect page performance, including memory leaks, memory bloat, and frequent garbage collections. | Fix memory problems |
| Memory Inspector tool | Inspect JavaScript ArrayBuffer with the Memory Inspector. | Inspect a JavaScript ArrayBuffer with the Memory Inspector tool |
| Network tool | Use the Network tool to make sure that resources are being downloaded or uploaded as expected. Inspect the properties of an individual resource, such as the HTTP headers, content, or size. | Inspect network activity |
| Network conditions tool | Use the Network conditions tool to disable the browser cache, set network throttling, set the user agent string, and set Content-Encodings such as deflate, gzip, and br. | Network conditions tool |
| Network Console tool | Use the Network Console tool to make changes to network requests (network calls) to see why they fail. Change and replay any of the network requests, and make detailed network API calls. | Network Console tool |
| Network request blocking tool | Use the Network request blocking tool to test blocking network requests to a specified URL pattern and see how a webpage behaves. | Network request blocking tool |
| Performance tool | Analyze runtime performance, which is how your page performs when it's running, as opposed to loading. | Introduction to the Performance tool |
| Performance monitor tool | Provides a real-time view of the runtime performance of a webpage, to determine where performance problems come from, making a website run slowly. Finds whether problems are from high memory or CPU usage, too-frequent layout and style calculations, or too many DOM nodes and event listeners. | Measure runtime performance of a page using the Performance monitor tool |
| Quick source tool | Use the Quick source tool to display or edit source files when using a tool other than the Sources tool. | Display or edit source files using the Quick source tool |
| Recorder tool | Use the Recorder tool to record user flows manually, and then replay them automatically to speed up testing and performance investigations. | Record and replay user flows and measure performance |
| Rendering tool | Use the Rendering tool to see what your webpage looks like with different display options or vision deficiencies. | Rendering tool, to see what a webpage looks like with different display options or vision deficiencies |
| Search tool | Use the Search tool to find specific source files for a webpage, including HTML, CSS, JavaScript, and image files. | Find source files for a page using the Search tool |
| Security tool | Inspects the security of a page. | Understand security issues using the Security tool |
| Sensors tool | Simulates different device orientations. | Simulate device orientation with the Sensors tool |
| Source Maps Monitor tool | Use the Source Maps Monitor tool to monitor your source maps. | Source Maps Monitor tool |
| Sources tool | Use the Sources tool to view, modify, and debug front-end JavaScript code, and inspect and edit the HTML and CSS files that make up the current webpage. | Sources tool overview |
| WebAudio tool | Use the WebAudio tool to monitor WebAudio traffic. The WebAudio tool uses the WebAudio API. | WebAudio tool |
| WebAuthn tool | Use the WebAuthn tool to create and interact with software-based virtual authenticators. | Emulate authenticators and debug WebAuthn |
| Welcome tool | The Welcome tool opens when you first open DevTools. It displays links to developer docs, latest features, Release Notes, and an option to contact the Microsoft Edge DevTools team. | Welcome tool |
Experimental tools
Microsoft Edge DevTools potentially includes additional tools, if you select the experiment's check box in DevTools Settings > Experiments. For example:
| Tool | Purpose | Article |
|---|---|---|
| Protocol monitor tool | Displays the DevTools protocol messages that are sent and received by DevTools, to debug the inspected page. | Protocol Monitor in Experimental features. |
The More Tools menus
The More tools (+) menu in the Activity Bar and in the Quick View toolbar is dynamic: it omits any tab tools that are open on that toolbar.
Activity Bar tools are tools that open in the Activity Bar (the upper pane) by default. Quick View tools are tools that open in the Quick View panel (the lower pane) by default. To show or hide the Quick View panel: when focus is on DevTools, press Esc.
The Command Menu first lists the Activity Bar tools (indicated by the Panel label), and then the Quick View tools:
To move a tool to the other toolbar, right-click the tool's tab and then select Move to bottom Quick View, Move to side Quick View, Move to top Activity Bar, or Move to left Activity Bar:
To open the Command Menu, press Ctrl+Shift+P (Windows, Linux) or Command+Shift+P (macOS). Or, click the Customize and control DevTools (
) button and then select Run command.
Closing tool tabs
To close a tool tab that's on a toolbar, right-click the tab, and then select Remove from Activity Bar or Remove from Quick View:
The Elements, Console, and Sources tools are permanent tabs and cannot be closed or moved from the Activity Bar to the Quick View panel. You can drag their tabs to reorder them in the Activity Bar.
The Console tool is also a permanent tab on the Quick View toolbar. In contrast, the Issues tool on the Quick View toolbar can be removed.
To restore all of the default tool tabs in the Activity Bar and Quick View:
In DevTools, select Customize and control DevTools (
) > Settings () > Preferences.Click the Restore defaults and refresh button. DevTools restarts, and the default tabs appear in both toolbars.
) > Preferences.See also
- Overview of DevTools - Similar to the present article, but broader coverage, with a top-level introduction to DevTools.
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