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Engineering blog
Chrome DevTools
Overview Open Chrome DevTools What's New in DevTools DevTools tips
Run commands in the Command Menu Disable JavaScript Keyboard shortcuts
Simulate mobile devices with Device Mode
Get started with viewing and changing the DOM View the properties of DOM objects Badges reference
View and change CSS Find invalid, overridden, inactive, and other CSS Inspect and debug HD and non-HD colors with the Color Picker Inspect CSS grid layouts Inspect and debug CSS flexbox layouts Inspect and debug CSS container queries CSS features reference
Console overview Log messages in the Console Run JavaScript in the Console Watch JavaScript values in real-time with Live Expressions Format and style messages in the Console Console features reference Console API reference Console Utilities API reference
Sources panel overview Debug JavaScript Pause your code with breakpoints Run snippets of JavaScript Debug your original code instead of deployed with source maps Edit and save files with Workspaces JavaScript debugging reference
Inspect network activity Network features reference View page resources
Analyze runtime performance Performance features reference Timeline event reference
Performance insights: Get actionable insights on your website's performance Lighthouse: Optimize website speed
Memory terminology Fix memory problems Record heap snapshots How to Use the Allocation Profiler Tool
Debug Progressive Web Apps View and edit local storage View and edit session storage View and change IndexedDB data View Web SQL data View, add, edit, and delete cookies View cache data Test back/forward cache Debug background services Deprecated: View Application Cache Data With Chrome DevTools
Animations: Inspect and modify CSS animation effects Changes: Track your HTML, CSS, and JavaScript changes Coverage: Find unused JavaScript and CSS CSS Overview: Identify potential CSS improvements Issues: Find and fix problems Media: View and debug media players information Memory Inspector: Inspect ArrayBuffer, TypedArray, DataView, and Wasm Memory. Network conditions: Override the user agent string
Record, replay, and measure user flows Features reference Extensions
Rendering tab overview Discover issues with rendering performance Emulate CSS media features Apply other effects: enable automatic dark theme, emulate focus, and more
Security: Understand security issues Search: Find text across all loaded resources Sensors: Emulate device sensors WebAuthn: Emulate authenticators
Remote debug Android devices Access local servers Remote debugging WebViews
Accessibility features reference Make your website more readable Navigate Chrome DevTools with assistive technology Track element focus
Customize DevTools
Settings overview Preferences Workspace Experiments Ignore List Devices Throttling Locations Shortcuts
Engineering blog

Rendering tab overview

Published on

Sofia Emelianova
Sofia Emelianova

Technical Writer, Google Chrome

GitHub

Discover a collection of options that affect web content rendering with this overview of the Rendering tab features in DevTools.

Overview

The Rendering tab helps you:

  • Discover rendering performance issues. Spot repainting, layout shifts, layers and tiles, scrolling issues, see rendering statistics and Core Web Vitals.
  • Emulate CSS media features. Test how pages render with different CSS media features without manually specifying them in your code or testing environment.
  • Apply other useful effects. Highlight ad frames, emulate focus on a page, disable local fonts and image formats, enable an automatic dark theme, and emulate vision deficiencies.

Open the Rendering tab

To open the Rendering tab:

  1. Open DevTools.

  2. Press Command+Shift+P (Mac) or Control+Shift+P (Windows, Linux, ChromeOS) to open the Command Menu.

    Command menu, Rendering

  3. Start typing rendering, select Show Rendering, and press Enter. DevTools displays the Rendering tab at the bottom of your DevTools window.

Important

In addition to opening the Rendering tab, you can also use the Command menu to search for and enable any option. Try typing an option name, for example, emulate.

Alternatively, you can open the Rendering tab in the following ways:

  • Press Esc to open the Drawer, and, in the top left corner, click More Tools More > Rendering.
  • In the top right corner, click More Options More > More Tools > Rendering.

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