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No Built-in Dark Mode
Does Substack Have a Built-in Dark Mode?
Substack has a dark mode in its mobile app, but not on its website. Here is the honest picture — and the simplest fix for your browser.
On the web (substack.com)
Substack has no built-in dark mode on substack.com — dark mode exists only in the mobile app. For the website, the free extension below is the answer.
On iPhone & Android app
Open the app settings
In the Substack app, open the menu or your account tab and look for Settings.
Find the theme option
Look for Appearance, Theme or Display and choose Dark — many apps simply follow your phone's own dark-mode setting.
Limitation: Substack offers dark mode only inside its mobile app — the website has no dark theme at all. Turn Off the Lights is the simplest way to get Substack dark mode in any desktop browser, with your own colors and scheduling.
Substack Dark Mode Features
Everything You Need for the Best Substack Dark Mode
Turn Off the Lights is not just a simple Substack dark mode. It is a complete browser enhancement built to give you full control over how every website looks in the dark.
Dark Mode for substack.com
Applies Night Mode to every page on substack.com — instantly and consistently.
Instant, No Flash of White
Night Mode loads before the page renders — you never see a bright flash when opening Substack pages.
Custom Dark Colors for Substack
Set your own background color, text color, and link color to create the perfect dark Substack experience.
Instant, No Setup
Night Mode works out of the box — install the extension, open substack.com, and the dark theme is already applied.
Auto-Schedule Dark Mode
Turn Substack dark mode on automatically at your chosen time — perfect for evening browsing sessions.
No Tracking, Fully Private
Turn Off the Lights does not read or transmit your Substack browsing data. Open-source and fully transparent.
How It Works
Enable Substack Dark Mode in Under 30 Seconds
Turn Off the Lights is available in every major browser store and takes less than 30 seconds to install and activate. No configuration needed — it works instantly.
Install Turn Off the Lights
Add the free extension from Chrome Web Store, Firefox Add-ons, Edge Add-ons, or Opera Add-ons.
Open substack.com
Navigate to substack.com in your browser with the extension installed.
Enable Night Mode
Open Options → Night Mode tab and toggle the Night Mode switch on.
Set Schedule & Colors
Choose custom dark colors and set an automatic day/night schedule so Substack dark mode switches without any manual effort.
Browser Support
One Substack Dark Mode Extension. Every Browser.
Turn Off the Lights is available across all major desktop browsers. Install it in one browser and your Night Mode settings sync automatically to others.
⬇ Install Free — Substack Dark Mode
FAQ
Frequently Asked Questions About Substack Dark Mode
On the web, no — substack.com has no dark mode setting. The mobile app offers one; for the website, the free Turn Off the Lights extension applies a real dark theme.
Substack's website has no dark mode setting. On substack.com, the free Turn Off the Lights extension is the simplest way to get a real dark theme.
Turn Off the Lights is a browser extension for desktop browsers. For mobile, Substack's own app dark mode is the recommended option.
On OLED screens, true black pixels use less power. A true-black custom theme from Turn Off the Lights Night Mode saves more than any fixed dark-grey theme.
Update the Substack app and check its theme or display settings. If dark mode is missing or too limited on the web, the Turn Off the Lights extension applies a dark theme in any desktop browser.
Why Turn Off the Lights
The Most Complete Substack Dark Mode Solution Available
People search for Substack dark mode because substack.com has no native dark theme — the bright pages can be hard on the eyes, especially at night. Turn Off the Lights solves this by applying Night Mode instantly.
Why Substack Has No Built-In Dark Mode
As of 2026, substack.com does not offer a built-in dark mode or night theme option. The Substack mobile app has a limited dark mode, but Substack's desktop website remains entirely white. Turn Off the Lights is the most reliable way to get Substack dark mode on any browser.
How Turn Off the Lights Applies Substack Dark Mode
When Night Mode is enabled, Turn Off the Lights converts Substack's white background to your chosen dark color while keeping product images visible and text readable. The conversion happens before the page finishes loading — so you never see a flash of white.
Protect Your Eyes While Browsing at Night
Late-night browsing on a bright white screen can cause significant eye strain. A dark theme via Turn Off the Lights reduces blue light emission, lowers effective screen brightness, and creates a much more comfortable experience during evening hours.
Open Source, Private, and Free — Always
Turn Off the Lights collects no personal data, displays no advertising, and charges nothing. The extension is fully open-source under the GNU General Public License Version 2 (GPLv2), with its complete source code available on GitHub for anyone to inspect. It has been in continuous development since 2009 and remains one of the most trusted browser extensions available, with millions of active users across all major browsers. Stefan Van Damme is the solo developer and has maintained the extension with monthly updates for over 15 years.
Dark Mode Guides
More Dark Mode Guides
Get the same dark experience on your other favorite websites and browsers: