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Smart Dark
Bright windows are darkened while native dark or neutral windows stay untouched.
Native Windows utilityDark mode.
Dark mode.
Everywhere.
Turn bright Windows windows dark — and NYX remembers the exact windows you chose after app or Windows restarts.
Windows 10 / 11 · Native Win32 · Perpetual offline license
What NYX does
Dark only what you choose.
NYX works at the window level, not just by executable. Different windows from the same app can have different rules.
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Persistent Windows
NYX stores a restart fingerprint and reconnects the rule to the replacement window after restart.
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Native Win32
Compact, fast and built as a native Windows utility — not a browser wrapper.
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Works Offline
Perpetual NYX1 keys are verified locally. No permanent online license check or hardware binding.
How it works
One hotkey. One window. Remembered.
Focus the exact window, press your configured hotkey, and NYX binds the dark overlay to that concrete window.
Before
Documents
→
With NYX
Documents
Add a window once. NYX can reconnect it automatically.
FAQ
View all FAQsShort answers.
Does NYX work offline?
Yes. Perpetual NYX1 licenses are verified locally using an embedded RSA public key. NYX does not need a permanent license-server connection.
What does Smart Dark do?
It waits for a stable result, identifies clearly bright windows and leaves native-dark or neutral windows untouched.
Can I try NYX before buying?
Yes. The current build includes a seven-day trial that starts on first launch for the current Windows user.
Ready when you are