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Chrome

How to Turn On Dark Mode on Popular Web Pages

Many websites switch to dark mode automatically when your device uses dark mode. Popular sites like Google, YouTube, Facebook, X and Wikipedia also have their own theme switch. For every other site, the Dark Reader extension can darken pages for you.

Updated
Time
3 minutes
Difficulty
Easy
Applies to
Windows, Mac, Android, iPhone

By Published Oct 6, 2026

Quick answer

  1. 1 Turn on dark mode in your device settings; many sites follow it.
  2. 2 Google: Settings > Dark theme. YouTube: profile > Appearance > Dark theme.
  3. 3 Facebook: Menu > Display & accessibility > Dark mode. X: More > Display > Lights out.
  4. 4 For all sites: install the Dark Reader extension in Chrome, Edge, Firefox or Safari.
On this page
  1. Before you start
  2. Follow your system theme
  3. Popular sites with their own switch
  4. Force dark mode on every site
  5. Troubleshooting
  6. Frequently asked questions

Before you start

  • A modern browser

Method 1 Follow your system theme

Sites that support dark mode switch automatically when your browser follows the system theme.

  1. Step 1: Windows

    Settings > Personalization > Colors > Dark.

  2. Step 2: Mac

    System Settings > Appearance > Dark.

  3. Step 3: Phones

    Android: Settings > Display > Dark theme. iPhone: Settings > Display & Brightness > Dark.

Method 3 Force dark mode on every site

Chrome also has an experimental Auto Dark Mode for Web Contents option at chrome://flags, which may cause display glitches.

  1. Step 1: Install Dark Reader

    Add the Dark Reader extension from the Chrome Web Store, Edge Add-ons, Firefox Add-ons or the Mac App Store (Safari).

  2. Step 2: Adjust per site

    Click the icon to toggle it for the current site or tweak brightness and contrast.

Troubleshooting

Images look strange in forced dark mode

Turn Dark Reader off for that site, or switch its mode to Filter.

Frequently asked questions

Is dark mode better for your eyes?

Many find it more comfortable in low light. In bright rooms, light mode can be easier to read.

Does dark mode save battery?

On OLED screens, yes; on LCD screens, barely.

Summary

Turn on system dark mode so supporting sites follow, use the built-in dark themes on Google, YouTube, Facebook and X, and install Dark Reader for everything else.

Sources

Written by

James Chambo

Founder

James is the Founder and Senior Editor of OnlineHow with more than 20 years of experience in internet publishing.