Custom CSS by Denis

Minimal and secure way to add custom CSS per-domain

Custom CSS by Denis - Chrome Extension for Per-domain CSS styling

'Custom CSS by Denis' is a browser extension allowing users to add custom CSS styles on websites they visit. The extension is dedicated to maintaining security and requires domain-specific permissions. Unlike other similar extensions, it does not access all data on all websites. The permission is prompted and given only when a user edits CSS on a specific domain and if left unused, these permissions get dropped. The extension maintains an uncluttered and minimal UI with an editable area for CSS code for each specific domain.

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Extension stats

By: https://sokolov.cc

Users: 9,000+

Rating: 4.50

(52)

1 new ratings

Version: 1.3.5 (Last updated: 2025-01-03)

Creation date: 2018-10-20

Risk:

Permissions:

activeTab
scripting
storage

Size: 165.89K

Email: de*****@sokolov.cc

URLs: Website

Full description: See detailed description

Ranking

# 10,337 ▼ 555

Other rankings

#6914 in Workflow & Planning ▲ 9 #73 in permissions keyword 7 ▲ #82 in permission keyword 14 #147 in domain keyword 17 ▲ 9

Other platforms

Not available on Android

Not available on Firefox

Not available on Edge

User reviews

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 Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.

Pros

Simple and easy to use
Works perfectly without any fuss
Open source with no login/account requirements
Indispensable for small UI tweaks
Good for enhancing usability and accessibility of websites

Cons

Styles often get overridden by existing website styles
Character limit for CSS edits creates issues
No option for syntax highlighting or IDE features
Styles do not apply to iframes
Some users report recent issues with changes getting overwritten

Most mentioned

Works like a charm
Simplicity and effectiveness
Need for improved features like URL portion styling
Issues with styles not applying due to character limits
Desire for more control over CSS application and order

User reviews

Thanks a lot! 🙏

Muhammet Emin ÖNER, 2025-03-13

Exactly what I was looking for! This is a lifesaver as a CS major.

Jac Chambers, 2025-02-12

Great extension. Been using for months and have had no issues. Simple and does what you expect. Thanks. One request: possible to get the styles to be applied to an iframe of the same domain? Currently the styles only get applied to the parent window. Using a Javascript extension similar to this one to inject the styles into the iframe.

Ryan Hanson, 2025-02-07

View all user reviews

Extension safety

Risk impact

Custom CSS by Denis does not require any sensitive permissions.

Risk impact analysis details

Low Request access to the following domains:

Risk likelihood

Custom CSS by Denis has earned a good reputation and can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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