Free forever — no account required

Dark mode, 
done  properly.

Eclipse builds a real dark theme out of each site's own colours — not a washed-out inverted filter. Tune it live, per site, and keep your eyes intact after midnight.

No sign-up to use Unlimited sites Nothing tracked

Chrome Web Store listing coming soon — the install link lands here once it's approved.

example.com/the-long-read
WorldScienceCulture
Science

Why your screen feels louder after midnight

By A. Writer · 8 min read

Eclipse reads this page's own colours and generates a dark palette from them — contrast preserved, brand hues intact.

Contrast checkedApplied in 12 ms
See it in action

Two clicks from a wall of white

Pin Eclipse once. After that it is the toolbar button, a switch, and three sliders that apply while you drag them.

example.com/the-long-readEclipse toolbar buttonR
WorldScienceCulture
Science

Why your screen feels louder after midnight

By A. Writer · 8 min read

Every surface on this page is a colour the site chose for daylight. Eclipse does not throw an inverting filter over the top of it — it reads those colours and generates a matching dark palette.

Text keeps its contrast ratio, brand colours keep their hue, and photographs are left exactly as the photographer shot them.

1Any page, at 1 a.m. — full brightness, straight to the retina
Generated, not inverted
Eclipse reads the site’s own palette and builds a dark one from it, so logos and photos survive.
Remembers each site
Flip the switch once and Eclipse keeps that choice for that domain, forever.
Live tuning
Brightness, contrast and saturation apply as you drag — no reload, no guessing.
Features

Everything you need, free

No site cap, no device cap, no account. Pro adds sync and a few power tools on top — it doesn't unlock anything that was withheld.

Real generated themes

Eclipse rewrites a site’s own colours into a dark palette. It is not a CSS invert filter, so photos and logos keep looking right.

Per-site control

Toggle Eclipse on or off for any individual site, and it remembers your choice the next time you visit.

Live tuning

Brightness, contrast and saturation sliders that apply as you drag — no reload, no guesswork.

No account, no caps

The free tier has no site limit, no device limit and no sign-up wall. Nothing leaves your browser.

Cross-device syncPRO

Your settings, per-site overrides and saved themes follow you to every browser you sign in on.

Custom themesPRO

Build and save unlimited palettes of your own, beyond the six presets that ship with the extension.

SchedulingPRO

Flip to dark at sunset and back at sunrise automatically, or set your own fixed time range.

Accessibility suitePRO

Colour-blind correction, dyslexia-friendly typography, and enforced minimum contrast ratios.

Pricing

Simple, honest pricing

The free tier isn't a trial. It's the whole dark-mode engine, forever.

Free

The complete dark-mode engine, with no strings.

$0forever
NO ACCOUNT NEEDEDIncluded on install
  • Real generated dark themes
  • Unlimited sites and devices
  • Per-site on/off overrides
  • Brightness / contrast / saturation
  • Six built-in theme presets
BEST VALUE
Pro

Sync, custom themes, scheduling and accessibility.

$19.99/year
OR $3.99/MO BILLED MONTHLYAvailable at store launch
  • Everything in Free
  • Cross-device sync
  • Unlimited custom themes
  • Sunset / sunrise scheduling
  • Full accessibility suite

Billed through Dodo Payments, our merchant of record. Cancel anytime.

Guides

Dark mode, explained properly

What the research actually says, why some pages fight back, and how these extensions work underneath — written by the team building one.

Browse all guides →
FAQ

Questions & answers

It mainly helps in low light, where a bright white page forces your pupils to contract and can cause eye strain over a long session. Eclipse also enforces a minimum contrast ratio on Pro, so text stays readable instead of just dimmer.

Noticeably, but only on OLED/AMOLED screens (most modern phones and some laptops) — those panels turn a pixel off to show true black, so a darker page draws less power. On standard LCD screens the backlight stays on regardless, so the saving is minimal.

Most "dark mode" extensions apply a blanket colour-invert filter, which can wash out photos, flip logos, and misread a site's own dark-mode CSS. Eclipse analyses each element's role (surface, text, border, accent) and rewrites colours in OKLab space instead of inverting them, which is why images and brand colours stay intact.

Yes — the free tier has no account, no site limit, and no device limit. It is the complete theming engine, not a limited trial. Pro is optional and adds sync, custom themes, scheduling and the accessibility suite.

Eclipse only reads the current tab’s rendered styles to repaint them — it never reads, stores or transmits page content, and on the free tier nothing leaves your device at all. See the Privacy Policy for exactly what Pro accounts store.

Any Chromium-based browser — Chrome, Edge, Brave, Opera and others that support Manifest V3 extensions.

The free tier has no device limit at all. Pro adds sync, so your settings and custom themes follow you across every device you sign in on.