How to Open Developer Tools in Chrome

Open Developer Tools with a Keyboard Shortcut

The fastest way to open Chrome's Developer Tools is to press F12 on Windows or Command + Option + I on Mac. This opens the tools in a panel on the right side of your screen by default, and you can start inspecting elements or checking the console immediately.

If F12 does not work on your keyboard, try Ctrl + Shift + I on Windows instead — some keyboards reserve F12 for other functions. On Mac, if Command + Option + I does not respond, make sure you are not in full-screen mode, which can interfere with keyboard shortcuts.

Open Developer Tools from the Chrome Menu

You can also reach Developer Tools through Chrome's menu. Click the three vertical dots in the top-right corner of your browser window, then select More tools, then Developer tools. This route takes a few more clicks but works the same way as the keyboard shortcut.

The menu approach is useful if you prefer not to memorize keyboard combinations or if your keyboard is not responding to shortcuts. The Developer Tools panel will open in the same position as it would from the keyboard shortcut.

Key Takeaways

Press F12 (Windows) or Command + Option + I (Mac) to open Developer Tools instantly without using the menu.
If F12 does not work, try Ctrl + Shift + I on Windows, as some keyboards map F12 to other functions.
You can also open Developer Tools by clicking the three-dot menu, selecting More tools, then Developer tools.
Developer Tools open in a side panel by default, but you can drag the edge to resize it or click the three dots in the tools panel to change its position.

Move or Resize the Developer Tools Panel

Once Developer Tools are open, you can change where they appear on your screen. Click the three vertical dots in the top-right corner of the Developer Tools panel itself (not the browser menu), then select Dock side. You can choose to dock the tools on the right, bottom, or left side of your window, or undock them into a separate window entirely.

Resizing works by dragging the edge between your webpage and the Developer Tools panel. If the tools are docked on the right, drag the vertical line left or right to make the panel wider or narrower. If they are docked at the bottom, drag the horizontal line up or down.

Navigate the Main Tabs in Developer Tools

When Developer Tools first open, you land on the Elements tab (or Inspector tab on some versions). This tab shows the HTML structure of the webpage you are viewing. To the right, you see the CSS styles applied to whatever element you have selected.

The Console tab displays error messages, warnings, and output from JavaScript code running on the page. This is where you go if a webpage is not working correctly and you want to see what went wrong. The Network tab shows every file the browser downloads when loading a page — images, scripts, stylesheets, and more — along with how long each one took to load.

Other tabs like Sources, Application, and Performance are available for more advanced debugging work, but most people start with Elements, Console, and Network.

Inspect a Specific Element on the Page

To examine the HTML and CSS of a particular part of a webpage, click the inspect element icon in the top-left corner of the Developer Tools panel — it looks like a small arrow inside a box. Your cursor changes to a crosshair, and you can now click any part of the webpage to see its code.

When you click an element, the Elements tab automatically highlights the corresponding HTML in the code panel, and the CSS styles appear on the right. This is how you find out what class or ID a button has, what font size text is using, or why an image is not showing up where you expected it.

Close Developer Tools

Press F12 again (or Command + Option + I on Mac) to close the Developer Tools panel. You can also click the X button in the top-right corner of the Developer Tools panel, or press Ctrl + Shift + I on Windows to toggle them closed.

Closing the tools does not affect your webpage or any work you are doing — it just hides the debugging panel. You can open them again at any time using the same shortcuts.

Frequently Asked Questions

Why is F12 not opening Developer Tools?

Some keyboards and laptops map F12 to a system function like volume or brightness. Try Ctrl + Shift + I on Windows or Command + Option + I on Mac instead. If neither works, use the menu: click the three dots, select More tools, then Developer tools.

Can I use Developer Tools on a mobile website?

Yes. Open Developer Tools on your desktop, then click the device icon in the top-left corner of the tools panel to switch to mobile view. This shows you how the website looks on a phone or tablet screen, which is useful for testing responsive design.

What does the Console tab show?

The Console displays error messages, warnings, and any text that JavaScript code on the page prints out. If a webpage is broken or behaving strangely, the Console often shows an error message that explains what went wrong.

Can I edit the HTML or CSS in Developer Tools?

Yes, you can change HTML and CSS directly in Developer Tools to test how changes look. However, these changes only affect what you see on your screen — they do not save to the actual website or affect other users. Refresh the page and your changes disappear.

How do I see how long a webpage takes to load?

Click the Network tab in Developer Tools, then refresh your webpage. The Network tab shows every file that downloads and how many milliseconds each one took. At the bottom, you see the total time to load the entire page.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.