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 handy Chrome extension that opens up the possibility of customized styling of websites. It instantly applies user-written CSS code on the current webpage, delivering immediate visual results. Through a single extension button, users can toggle visibility of the CSS editor. This extension also features a green indicator, signaling when custom CSS has been applied to a webpage, and incorporates CodeMirror for code highlighting and the Emmet toolkit for speedier HTML & CSS coding.

Users: 61,801
Rating: 3.60 (248)
Version: 2.2 (Last updated: 2017-10-24)
Creation date: 2017-10-22
Risk impact: High risk impact
Risk likelihood: Very low risk likelihood
Manifest version: 2
  • tabs
  • http://*/*
  • https://*/*
Size: 305.15K
Stats date:

Other platforms

Not available on Firefox
Not available on Edge
Want to check extension ranking and stats more quickly for other Chrome extensions? Install Chrome-Stats extension to view Chrome-Stats data as you browse the Chrome Web Store.
Chrome-Stats extension

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.

User reviews
User reviews summary
These summaries are automatically generated weekly using AI based on recent user reviews. Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
  • works very well and reliably
  • quick way to make visual adjustments without a complete theme
  • allows CSS changes on specific sites like Microsoft DotNET and YouTube control panel placement
  • does not work
  • does not accept proper css files
  • brings more ads
  • global dependency on jQuery
  • extension not updated since 2017
Most mentioned
  • does not work or works intermittently
  • Uncaught ReferenceError: jQuery is not defined
  • last updated in 2017 and needs an update
View all user reviews
Risk impact

User CSS is risky to use as it requires a number of sensitive 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 likelihood

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

Upgrade to see risk analysis details
Promo images
User CSS small promo image
Small promo image
Similar extensions

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