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by darkreader

darkreader /darkreader

Dark Reader Chrome and Firefox extension

7.1K Stars 1.1K Forks Last release: over 2 years ago (v3.5.4) MIT License 2.2K Commits 10 Releases

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Dark Reader for Google Chrome and Mozilla Firefox

Dark Reader screenshot

This extension inverts brightness of web pages and aims to reduce eyestrain while browsing the web. Visit Chrome Web Storeand Firefox Add-onsfor more info.

How to contribute


Donate via Open Collective.


Improve or suggest a translation here. See the list of supported language codes.

Fixing wrong inversion

If some website is already dark (has all pages dark by default), you can add it to dark-sites.config file(please, preserve alphabetical order).

If some parts of web-pages are wrongly inverted, you can specify necessary CSS selectors atdynamic-theme-fixes.config file(for Dynamic Theme mode) or inversion-fixes.config file(for Filter and Filter+ modes)(please, preserve alphabetical order by URL, use short selectors, preserve code style).

Please note, that merged changes to these files are automatically delivered to all users within 15 minutes. Config syncing was disabled, cause the GitHub team doesn't allow using GitHub as a CDN. Storing these files and making requests to other resources will be expensive and look suspicious.

Using Dev Tools

Dev Tools should be used to fix minor issues on a web page_(like dark icon on a dark background, removing bright background, adding a white background to transparent image, etc.)_. If the page looks partially dark and bright in Dynamic mode, it should be considered as a bug. For Filter mode it is a common practice to invert already dark page parts.

  • Open Chrome Dev Tools (F12).
  • Click on element picker (top-left corner).
  • Pick wrongly inverted element.
  • Choose a selector for that element or all similar elements (e.g. if element has
    class="icon small"
    selector may look like
  • Click Dark Reader icon.
  • Click Open developer tools (at bottom).
  • Find or add a block containing URL and selectors to invert. ``` dynamic-theme-fixes.config ================================

INVERT .icon

CSS .wrong-element-colors { background-color: ${white} !important; color: ${black} !important; }


- `INVERT` rule inverts specified elements. For \*\*Dynamic mode\*\* use `INVERT` only for dark images, that are invisible on dark backgrounds (icons, diagrams, charts, ` ![]()` and `<svg>` elements).
- `CSS` rule adds custom CSS to a web page.
`!important` keyword should be specified for each CSS property to prevent overrides by other stylesheets.
**Dynamic mode** supports `${COLOR}` template, where `COLOR` is a color value before the inversion (`white` will become `black` in dark mode).
- `IGNORE INLINE STYLE` rule will not analyze the inline style of matched selector's. (e.g. --darkreader-inline-bgcolor or <p style="color: red">This will not be analyzed by dark reader if it has an matched selector</p>)
- **Special notice for Filter and Filter+ config**.
It works by inverting the whole web page and reverting necessary parts (images, videos, etc.), listed in the `INVERT` section.
If inverted element contains images or other content that becomes wrongly displayed, `NO INVERT` rule can be used.
`REMOVE BG` removes background image from element and forces black background.


INVERT .icon .button



player *

REMOVE BG .bg-photo

CSS .overlay { background: rgba(255, 255, 255, 0.5); } ``` - Click Apply. - Check how it looks both in Light and Dark mode. - If the fix worked opendynamic-theme-fixes.config fileor inversion-fixes.config file. - Click edit (sign-in to GitHub first). - Insert your fix there. Preserve alphabetical order by URL. - Provide a short description of what you have done. - Click Propose file change. - Review your changes. Click Create pull request. - GitHub will run tests reviewing your changes. - If you see a red cross click Details and see what is wrong and edit the existing Pull Request. - When you see a green checkmark then everything is fine. - Dark Reader developer will review and merge your changes making them available for all users.

Adding new features or fixing bugs

If you would like to add new feature to Dark Reader or fix a bug, submit an issue in GitHub (if there is no existing one), discuss it with active contributors, wait for approval.

To build and debug the extension install the Node.js LTS. Install development dependencies by running

npm install

in the project root folder. Then execute

npm run debug



Open the


page. Disable the official Dark Reader version. Enable the Developer mode. Click Load unpacked extension button, navigate to the project's






page. Disable the official Dark Reader version. Open


page. Click Load Temporary Add-on button, open



After making any code changes the project will be automatically recompiled. If the extension didn't reload automatically it can be reloaded manually on the extensions page.

For editing the code you can use any text editor or web IDE (like Visual Studio Code, Atom, WebStorm).Preserve code style (whitespaces etc).

Run tests by executing the

npm test


Submit a pull request, wait for review.

Building for use

You can install the extension from a file. Install Node.js LTS. Download the source code (or check out from git). Open terminal in root folder and run: -

npm install
  • npm run release

This will generate

for use in Chromium browsers and


for use in Firefox.

Using for a website

You can use Dark Reader to enable dark mode on your website. - Install the package from NPM (

npm install darkreader

) - or build from the source code (

npm run api

) - or include the script via a CDN such as unpkg or jsDelivr

Then use the following API ```javascript DarkReader.enable({ brightness: 100, contrast: 90, sepia: 10 });


// Enable when system color scheme is dark{ brightness: 100, contrast: 90, sepia: 10 });

// Stop watching for system color scheme;

... or if you are using ES modules

javascript import { enable as enableDarkMode, disable as disableDarkMode, auto as followSystemColorScheme, } from 'darkreader';

enableDarkMode({ brightness: 100, contrast: 90, sepia: 10, });


followSystemColorScheme(); ```


This project exists thanks to all the people who contribute


Thank you to all our backers!


Support this project by becoming a sponsor

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