Dark Reader vs Modern Dark Mode: Honest Comparison for 2026

Both extensions give you dark mode on any site, but they work in very different ways. Dark Reader does more and looks better on many sites; Modern Dark Mode is simpler and lighter. Disclosure: Modern Dark Mode is made by Bushe.co, so here are the honest trade-offs, including where Dark Reader wins.

How each one works

Dark Reader (free and open source) reads each page's styles and generates new dark colors for them. This "dynamic" mode is why text, borders and buttons usually look as if the site designed its own dark theme. It also has lighter Filter modes that invert the page instead.

Modern Dark Mode uses a filter: it inverts the whole page's colors and then flips images, video and embedded frames back so photos look normal. That takes very little processing, but colors are a straight inversion rather than a hand-tuned palette.

Side by side

• Look: Dark Reader's dynamic mode usually looks more natural. Modern Dark Mode's inversion is fine on text-heavy pages but can give odd shades on colorful designs.
• Speed: filter-based dark mode is light on resources. Dark Reader's dynamic mode has to analyze styles, which can slow very large or busy pages.
• Adjustments: both have brightness, contrast, sepia and grayscale. Dark Reader adds font options and several modes.
• Per-site control: both can switch off on sites you choose. Dark Reader can also apply different settings per site.
• Automation: Modern Dark Mode has an on/off schedule. Dark Reader can follow a schedule or your system's light/dark setting.
• Custom fixes: only Dark Reader lets you write custom CSS for a site.
• Cost: both are free on Chrome.

Does Dark Reader slow down Chrome?

On most sites you won't notice. On heavy pages, such as long feeds, big spreadsheets or complex web apps, dynamic mode can make loading and scrolling sluggish. If that happens, switch that site to Filter mode in Dark Reader, turn Dark Reader off for that site, or use a filter-based extension there.

Dark Reader best settings and custom CSS

• Start with Dynamic mode and the default brightness and contrast. Lower brightness slightly if white images feel glaring.
• A little sepia makes long reading warmer and softer.
• If a site looks broken, try Filter mode for that site before turning Dark Reader off.
• For custom CSS, open Dark Reader's Dev tools from its menu. There you can add fixes for a site, including your own CSS rules. Save, and the fix applies whenever you visit.

Which should you pick?

• Dark Reader if you want the best-looking results, per-site tuning or custom CSS.
• Modern Dark Mode if you want something simple and light that keeps photos normal, with a schedule and a list of sites to skip.

Don't run both at once: two dark modes on one page cancel each other out or make a mess. For a closer look at Dark Reader's permissions, see is Dark Reader safe?