Stay organized with collections Save and categorize content based on your preferences.
Discover useful effects to apply to your page with this reference of the Rendering tab options.
Highlight ad framesTo check if frames are tagged as ads:
If you switch focus from the page to DevTools, some overlay elements automatically hide if they are triggered by focus. For example, drop-down lists, menus, or date pickers. The check_box Emulate a focused page option lets you debug such an element as if it is in focus.
Caution: With this option turned on, thedocument.visibilityState
is set to visible
and the visibilitychange
event doesn't fire. For more information, see Page Visibility API.
To emulate a focused page:
On the page, open the Rendering tab, then check and clear Emulate a focused page.
You can also find the same option under the :hov
button on the action bar in Elements > Styles.
To discover more ways to freeze an element, see Freeze screen and inspect disappearing elements.
Disable local fontsCheck if the local font alternatives work as expected by disabling local()
sources in @font-face
rules.
Often, developers and designers use two different copies of the same font during development:
Disabling local fonts makes it easier for you to:
@font-face
rulesChrome renders this sentence in Courier New if it finds this font on your device.
Emulate missing local()
sources in @font-face
rules:
Inspect the sentence above, open Elements > Computed, scroll all the way down, and, under Rendered Fonts, discover that Chrome found Courier New in local files.
Open the Rendering tab, check Disable local fonts, and refresh reload the page.
Observe the sentence in Roboto found on the web.
See what your site can look like in dark mode even if you didn't implement it.
Chrome 96 introduced an Origin Trial for Auto Dark Theme on Android. With this feature, the browser applies an automatically generated dark theme to light themed sites if the user opted into dark themes in the operating system.
To enable automatic dark mode:
prefers-color-scheme
drop-down list is disabled and set to prefers-color-scheme: dark
automatically. Emulate vision deficiencies
Everyone should be able to access and enjoy the web. Google is committed to making that a reality.
With Chrome DevTools, you can see how people with vision deficiencies see your site, so you can make it better for them. For more information, see Simulating color vision deficiencies.
To emulate vision deficiencies:
Under Emulate vision deficiencies, select one of the following from the drop-down list:
These emulations make it easier for developers to test different image loading scenarios without having to switch browsers.
Suppose you have the following HTML code to serve an image in AVIF and WebP formats for newer browsers, with a fallback PNG image for older browsers.
<picture>
<source srcset="test.avif" type="image/avif">
<source srcset="test.webp" type="image/webp">
<img src="test.png" alt="A test image">
</picture>
To disable all AVIF images on a page (or, similarly, WebP images):
img src
. The current image src (currentSrc
) is now the fallback WebP image.Similarly, you can disable WebP images.
Key point: These options disable image caching automatically.Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2024-03-12 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-03-12 UTC."],[],[]]
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