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    User JavaScript and CSS Alternatives

    User JavaScript and CSS is described as 'Userscript's and userstyle's — simple extension to inject own JavaScript or CSS rules to any page' and is an app in the Development category. There are more than 10 alternatives to User JavaScript and CSS for a variety of platforms, including Google Chrome, Firefox, Mac, Windows and Linux. The best alternative is Dark Reader, which is both free and Open Source. Other great apps like User JavaScript and CSS are Stylus (Free, Open Source), Amino: Live CSS Editor (Free), Stylebot (Free, Open Source) and FreeStylerWs (Free).

    This page was last updated Sep 27, 2021
    • FreeProprietary
    • Online
    • Google Chrome
    More
    Userscript's and userstyle's — simple extension to inject own JavaScript or CSS rules to any page.
    Learn more about User JavaScript and CSS

    1. This eye-care extension enables night mode creating dark themes for websites on the fly. Dark Reader inverts bright colors making them high contrast and easy to read at night.
    2. Redesign the web with Stylus, a user styles manager.


    3. Make visual changes to any website with CSS and see changes in real time. Sync, edit, and export your custom style sheets.
    4. Change the appearance of websites instantly by applying a easy to use interface for changing the CSS. Preview and install styles created by users for your favorite websites.
      • FreeProprietary
      • Mac
      • Windows
      • Linux
      • Android
      • Chrome OS
      • Google Chrome
      • Safari
      • Opera
      • Firefox
      More
      Styles and skins for all popular sites in the web.


      • FreeOpen Source
      • Online
      • Chrome OS
      • Google Chrome
      • Firefox
      More
      A Chinese Developed Theme Manager. based on the source code of Stylish-for-Chrome 1.7.0.
      • FreeOpen Source
      • Mac
      • Windows
      • Linux
      • Firefox
      More
      Dynamically load stylesheets in Firefox from plaintext files in your profile.
      • FreeOpen Source
      • Mac
      • Windows
      • Linux
      • Online
      • UC Browser
      • CentBrowser
      • Google Chrome
      • Yandex.Browser
      • Opera
      • Chromium
      • Firefox
      More
      Modify requests, inject JavaScript and CSS into pages.
      • iPhone
      • iPad
      More
      Noir is a Safari extension that automatically adds a dark mode to every website you visit.
    5. Introducing Cascadea, the first custom style manager designed as a Safari App Extension and native macOS app. Cascadea makes it easy to install custom styles that change the look and feel of any website you want.
    Showing 10 of 11 alternatives