User CSS

User CSS

A quick and easy way to add custom CSS to the current web site.

User CSS promo image
What is User CSS?

User CSS is a featured Chrome extension by This extension has 54,633 weekly active users, an average user rating of 3.62, and is most similar to User JavaScript and CSS and Stylebot. The latest version, 2.2, was updated 5 years ago.

Stats date:
Rating: 3.62 (233)
Version: 2.2 (Last updated: 2017-10-23)
Creation date: 2017-10-22
Manifest version: 2
  • tabs
  • http://*/*
  • https://*/*
Size: 305.15K
Risk impact: High risk impact
Risk likelihood: Very low risk likelihood
Found a bug?

Other platforms

Not available on Firefox
Not available on Edge
Insert your custom CSS code to the current web site and you will see the changes immediately.

How to use:

1. Press the extension button to display the CSS editor.
2. Write your custom CSS.
3. Enjoy the result.
4. Press the extension button to hide the CSS editor.

Button shows a green indicator, when current web site has custom CSS.

The extension uses CodeMirror to highlight code and supports the Emmet toolkit.
Risk impact

User CSS requires a number of risky permissions that can potentially harm your browser and steal your data. Exercise caution when installing this extension. Review carefully before installing. We recommend that you only install User CSS if you trust the publisher.

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypass your security settings, and access your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Risk likelihood

User CSS has earned a good reputation and can be trusted.

Risk likelihood measures the probability that a Chrome extension may turn malicious. This is determined by the publisher and the Chrome extension reputation on Chrome Web Store, the amount of time the Chrome extension has been around, and other signals about the Chrome extension. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Chrome extension, especially ones with higher risk impact and/or higher risk likelihood.

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User reviews
It was amazing, but stopped to work :(
by Ilya Ilya, 2023-02-21

Its awesome. So Simple and Quick to Hide any Disturbing Ads.

не работает
View all user reviews
Promo images
User CSS small promo image
Small promo image
Similar extensions

Here are some Chrome extensions that are similar to User CSS:

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User count: 139,211
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Rating: 1,543
Change the appearance of the web instantly
Custom CSS by Denis Custom CSS by Denis
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Minimal and secure way to add custom CSS per-domain