Dark Reader Extension Guide: Dark Mode for Any Website

Many websites are bright white. That is fine in a sunny room, but it can feel harsh on a phone or laptop in a dark room. Some sites offer a dark theme, and many do not. Dark Reader is a browser extension that tries to give you a dark version of almost any website.

This guide explains what Dark Reader is, how it works in plain words, how to install it in Google Chrome, how to adjust its settings, how to turn it off for one website, what it can and cannot do, and how to fix common problems. It also explains the privacy side honestly, because an extension that changes web pages needs wide access.

Sources and accuracy

We read the official Dark Reader website and help page, its privacy policy, its GitHub README and its Chrome Web Store listing in October 2026. Where we describe privacy, we quote the developer's own statements and do not present them as an independent guarantee. Store versions, ratings and user numbers change often, so we do not rely on them. The extension's screen can change after updates. If a button name looks different, check the official help page.

What is Dark Reader?

Dark Reader is a free dark mode extension for websites. Its website describes it as an open-source eye-care browser extension, and the GitHub repository lists it under the MIT license. The Chrome Web Store listing names Dark Reader Ltd as the publisher.

In simple words: once installed, it adds a button to your browser. When you switch it on, it changes the colours of the page you are viewing so that white backgrounds become dark and dark text becomes light.

How does Dark Reader work?

The official GitHub page says Dark Reader analyses web pages and generates a dark mode. It does not just darken the screen. It reads the page's style information and changes the colours in the browser, on your device.

Dark Reader has four theme generation modes, according to its help page:

Mode	What the help page says
Dynamic	Analyses style sheets, background images and vector graphics. Gives the best visual results but uses more resources when a page first loads.
Filter	Inverts the whole page and then reverts some parts. It is fast but can make some dark areas light, and may slow large pages.
Filter+	Like Filter, with custom SVG filters for better colour handling. The help page says it works poorly in Firefox.
Static	Quickly creates a basic stylesheet.

If a site looks strange, switching the mode is one of the first things to try.

Key features

Dark mode for many websites that do not have their own dark theme.
Adjustable brightness, contrast, sepia and grayscale settings.
Different settings for different websites, and a list of sites where it should be turned on or off.
A font option and text stroke setting on the More tab.
According to the Chrome Web Store listing, it can sync with your system's dark mode and skip sites that are already dark.

Why use Dark Reader?

A bright search page, article or documentation site can look much calmer in a dark room.
Sites without a dark theme become readable at night without changing the website itself.
Control. You pick the brightness and contrast that feel right to you.

The developer describes the extension as aiming to reduce eyestrain. Comfort is personal, though. Dark mode does not automatically prevent eye strain or improve sleep, and some people find light text on a dark background harder to read. Try different settings and see what works for you.

How to install Dark Reader on Google Chrome

Open the official Dark Reader website (darkreader.org) and use its Chrome link, or go to the Chrome Web Store listing linked at the end of this article.
Check that the extension is named Dark Reader and the publisher is Dark Reader Ltd.
Click Add to Chrome, then Add extension.
To keep the icon visible, click the Extensions (puzzle piece) button next to the address bar and click the pin button next to Dark Reader. The official help page gives these steps for a hidden icon.

Chrome shows what access an extension wants before you add it. Read that message and install only if you accept it.

How to enable dark mode on a website

Open a website, for example a bright article or documentation page.
Click the Dark Reader icon in the toolbar.
Use the main On/Off switch to turn the extension on or off.
If the page does not change, check that the site is not excluded (see the next sections).

If the on/off switch or the site toggle is greyed out, the help page says the browser is blocking the extension on that page. Browser pages, store pages and settings pages usually stay white for this reason.

How to adjust brightness and contrast

In the Dark Reader popup, use the Filter settings. The help page lists:

Mode (Dynamic, Filter, Filter+ or Static)
Brightness
Contrast
Sepia
Grayscale

Change one slider at a time and look at the page. Very low brightness or very high contrast can make text harder to read, so move in small steps. Sepia gives a warmer, paper-like tone for some readers.

How to customise Dark Reader for individual websites

Toggle site: Adds or removes the current site from the ignore list. Use it when one site looks wrong.
Only for: Applies your current filter settings to the current site only. Click it to highlight it, adjust the settings, and click again to cancel.
Site list: Open the Site list settings. Choose Invert listed only to run Dark Reader only on sites you list, or Not invert listed to turn it off on listed sites. You can type a site such as google.com, or patterns like google.* or google.com/maps. Regular expressions must start and end with /.

Supported browsers and compatibility

According to the official GitHub README, Dark Reader is available for Chrome and Chromium-based browsers (including Edge through Edge Add-ons), Firefox, Safari and Thunderbird. The official website lists Chrome, Firefox, Safari and Edge.

Features can differ between browsers. For example, the help page says that on Firefox you need to type a font name, and that Filter+ works poorly there. It also notes that Firefox security rules stop Dark Reader from working on some websites by default.

For phones, the help page links to a Dark Reader app for Safari on iOS and macOS. It does not describe setup for other mobile browsers, so check the official website for your phone's browser before you install anything.

In Chrome, the help page says you can use Allow in incognito on the extensions page for Incognito windows, and Allow access to file URLs for local files.

Privacy and permissions: what users should know

To change how websites look, Dark Reader needs access to the pages you visit. This is a wide kind of access, so be careful which extensions you install.

What the developer says:

The website says the extension does not send user data anywhere.
The privacy policy says Dark Reader has never collected and will never collect personal data or browsing history. It also says that in the future it may collect certain technical information (such as browser version, platform name, display settings and theme options, excluding browsing history), only with your permission.
The Chrome Web Store listing says the developer has disclosed that it will not collect or use your data.
Settings are stored using the browser's extension storage, according to the privacy policy.

These are the developer's statements. They are not a promise that any extension is completely risk-free. To stay safe:

Install it only from darkreader.org links or the official store listing.
Be careful with copies and similarly named extensions. The Chrome listing itself advises disabling similar extensions to avoid conflicts.
Review your installed extensions from time to time and remove those you do not use.

Limitations and possible issues

Some websites may look wrong after their colours are changed.
Images, graphics, forms or other parts of a page may not look as intended.
Some pages may load more slowly or show visual glitches, especially in Filter mode on large pages or Dynamic mode on first load.
Browser pages, extension store pages and settings pages cannot be changed.
A very dark page with very low brightness can be hard to read.
It cannot promise a perfect dark theme on every page. Results depend on the website.

How to fix common Dark Reader problems

The icon is missing. Click the Extensions button next to the address bar and pin Dark Reader.

Nothing changes. Update your browser. Make sure the switch is on, the site is not on the ignore list, and the Site list is set to "Not invert listed".

One site looks wrong. Use Toggle site to turn Dark Reader off for that site, or try another mode (for example Filter). The help page also suggests a light mode for that site and, if the problem persists, contacting the developer with the site address, a screenshot and your browser and OS version.

The page is slow. Try a different mode, close other heavy tabs, or exclude that site.

The page flashes white or the new-tab page stays white. The help page says to choose a dark theme in your browser's own settings. Browser pages themselves cannot be changed by the extension.

Text is hard to read. Lower the contrast or raise the brightness a little and test again.

Conflicts. If you use another dark mode or colour extension, turn one of them off.

Pros and cons

Pros

Free, open-source (MIT) and available for several browsers.
Works on many sites without a built-in dark theme.
Detailed controls and per-site settings.

Cons

Needs wide access to the pages you visit.
Some sites look wrong or load more slowly.
Features differ between browsers.
Does not change browser pages.

Frequently asked questions

Is Dark Reader free? The official website describes it as a free extension. It also has a page for supporting the project.

Does Dark Reader work on every website? No. It works on many websites, but some pages may look wrong, and browser pages cannot be changed.

Is Dark Reader safe? It is open source, and the developer says it does not collect personal data. Still, any extension that can read and change web pages needs careful installation from official sources.

Will it protect my eyes? The developer says the dark mode aims to reduce eyestrain. Comfort differs between people, and we cannot promise a result.

Can I use it on Firefox or Edge? Yes, according to the official links. Check the official site for the correct store page.

How do I turn it off for one site? Open the popup and use Toggle site, or add the site to the Site list under Not invert listed.

Does it work on phones? There is an app for Safari on iOS. The help page does not describe other mobile browsers, so check the official website.

Official links

Looking for more browser add-ons? See the Extensions category, including our guide to the Simple Proxy Switcher for Chrome.

Final verdict

Dark Reader is a useful free extension for anyone who wants a dark version of bright websites. Install it from an official source, start with the default settings, adjust brightness and contrast in small steps, and exclude any site that looks wrong. Remember that it needs wide access to the pages you open and that results vary from site to site.

Sources checked: darkreader.org (home, help and privacy pages), the Dark Reader GitHub README and the Chrome Web Store listing (October 2026). Features and store details can change, so check the official pages for the latest information.

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