Top 9 Open-Source Alternatives to User JavaScript and CSS

User JavaScript and CSS

User JavaScript and CSS on any website.

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Product categories

Browser Extension Browsing Experience CSS Framework Communication Dark Mode Design Tools Developer Tools Development Tools Monitoring Tools Security & Privacy Tool UI

Summary

The top open-source alternatives to User JavaScript and CSS are Dark Reader, Violentmonkey, and Stylus - User Styles Manager. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Dark Reader Landing Page
1

Dark Reader

Reduce eye strain in your browser with this extension that provides a dark theme for browsing.
Pricing:
- Open Source
#Browser Extension #Dark Mode #Browsing Experience 191 social mentions
Violentmonkey Landing Page
2

Violentmonkey

Violentmonkey is a userscript manager to support running userscripts in web pages.
Pricing:
- Open Source
#Browser Extension #Dark Mode #Developer Tools 46 social mentions
Stylus - User Styles Manager Landing Page
3

Stylus - User Styles Manager

Stylus is a userstyles editor and manager based on the source code of Stylish version 1.5.2.
Pricing:
- Open Source
#Monitoring Tools #Browser Extension #Dark Mode 48 social mentions
Greasemonkey Landing Page
4

Greasemonkey

Customize the way a web page displays or behaves, by using small bits of JavaScript.
Pricing:
- Open Source
#Browser Extension #Dark Mode #Developer Tools 1 social mentions
Stylebot Landing Page
5

Stylebot

Change the appearance of websites instantly. Preview and install styles created by other users on stylebot.me
Pricing:
- Open Source
#Monitoring Tools #Browser Extension #Dark Mode 14 social mentions
Stylus Landing Page
6

Stylus

EXPRESSIVE, DYNAMIC, ROBUST CSS
Pricing:
- Open Source
#Browser Extension #Dark Mode #Developer Tools 14 social mentions
midnight-lizard.org
7

Midnight Lizard

Accessible color schemes for all websites
Pricing:
- Open Source
#Communication #Browser Extension #Dark Mode
User-Agent Switcher and Manager Landing Page
8

User-Agent Switcher and Manager

spoofs browser's User-Agent string.
Pricing:
- Open Source
#Monitoring Tools #Browser Extension #Dark Mode 3 social mentions
Tailwind CSS Landing Page
9

Tailwind CSS

A utility-first CSS framework for rapidly building custom user interfaces.
Pricing:
- Open Source
#Development Tools #CSS Framework #UI 1013 social mentions