What Is Dark Reader?

Updated

Dark Reader is a free, open-source browser extension that applies a dark theme to websites that don't offer one themselves. Instead of relying on each site to build its own night mode, it rewrites colors on the page so text stays readable against a dark background. It's aimed at anyone who wants less bright white on screen — for eye comfort, late-night browsing, or a consistent dark look across the web.

What Dark Reader actually does

Most websites are designed with light backgrounds. Dark Reader generates a dark color scheme for them on the fly, so you get a night-mode appearance even on sites that have never implemented one. According to the project, it works across Facebook, Amazon, YouTube, Google Search, Wikipedia, Twitter, and many other websites.

The extension is described as an eye-care tool. It has been developed since 2014 and is trusted by 10,000,000 users, per the official site.

Key features

  • Dark mode on all websites — applies a dark theme broadly rather than only on supported sites.
  • Adjustable theme settings — you can configure brightness, contrast, and sepia to tune how the dark theme looks.
  • Per-site or global control — you can enable it for all websites or only for particular domains.
  • Open source — the code is publicly available.
  • No data sent — the project states it doesn't send user data anywhere.

How to get started

  1. Install the browser extension. Dark Reader publishes official builds for Chrome, Firefox, Safari, and Edge. Use the official link for your browser rather than a third-party copy.
  2. Configure the dark theme. Adjust brightness, contrast, and sepia until the result is comfortable to read.
  3. Choose where it applies. Turn it on for all websites, or restrict it to particular domains where you want dark mode.

The expected result: pages that were light now render with a dark background and readable text, and the change follows you across the sites you browse.

Who it's for

Dark Reader suits you if:

  • You browse at night or in low light and want to reduce screen brightness.
  • You want a consistent dark experience without waiting for each site to add its own dark mode.
  • You prefer an open-source tool and care about not having your browsing data sent elsewhere.

It may be less necessary if you only use a handful of sites that already ship a good built-in dark mode, or if you don't want an extension modifying page colors.

Things to keep in mind

  • Because Dark Reader recolors pages dynamically, some sites with unusual designs or images may look different from their original styling. The brightness, contrast, and sepia controls exist precisely to correct for this.
  • It's a browser extension, so it applies within the browser you install it in — not system-wide across all apps.
  • The official site lists separate install links per browser; matching the right build to your browser avoids compatibility problems.

For the current install links and any updates, check the official Dark Reader website for your specific browser.