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Browser Extensions · head to head

Night Eye vs Violentmonkey

Night Eye logo

Night Eye

Browser Extensions

Dark mode on any website

From
Free
Rated
-
Full reviewWebsite
Violentmonkey logo

Violentmonkey

Browser Extensions

Open source userscript manager

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Night Eye can impact browser performance, especially on older or less powerful devices due to color conversion processing; Violentmonkey smaller script ecosystem compared to Tampermonkey which has larger user base and more available scripts
  • They diverge on capability: Night Eye covers Dark mode, Violentmonkey covers Userscript support.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Night Eye and Violentmonkey actually diverge.

Attributes where Night Eye and Violentmonkey differ
AttributeNight EyeViolentmonkey
PlatformsChrome, Safari, Edge, Firefox, Opera, BraveChrome, Firefox, Edge
Founded20182013

Identical on both: starting price (Free), pricing model (Unknown), free tier (Yes), user rating (Not yet rated), category (Browser Extensions).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Night Eye

  • Dark mode
  • Color analysis
  • Image preservation
  • Per-site settings
  • Safari support

Only in Violentmonkey

  • Userscript support
  • Clean interface
  • Cloud sync
  • Script editor

Both cover

  • Chrome support
  • Firefox support
  • Edge support
  • Opera support

What people use each for

The jobs each tool is most often brought in to do.

Night Eye

  • Force a consistent dark mode on websites that don't natively support onenot Violentmonkey
  • Reduce eye strain and blue light exposure during night browsing via a built-in blue-light filternot Violentmonkey
  • Per-site color, brightness, contrast, and saturation customizationnot Violentmonkey
  • Selectively convert only icons/small images rather than full images to preserve visual fidelity in dark modenot Violentmonkey

Violentmonkey

  • Run open-source userscripts to customize or automate web pagesnot Night Eye
  • Import scripts compatible with Greasemonkey and Tampermonkey formatsnot Night Eye
  • Sync scripts and settings across browsers via Dropbox, OneDrive, Google Drive, or WebDAVnot Night Eye
  • Batch import/export scripts as zip filesnot Night Eye

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Night Eye

  • Can impact browser performance, especially on older or less powerful devices due to color conversion processing
  • Ineffective on web applications with fixed color schemes that cannot be altered
  • Does not work offline or on non-web content
  • Limited customization on websites that have their own built-in dark mode implementation

Violentmonkey

  • Smaller script ecosystem compared to Tampermonkey which has larger user base and more available scripts
  • Less marketing and visibility results in lower adoption compared to more widely-known alternatives
  • Community maintenance model means slower feature development compared to commercial alternatives

Pricing, plan by plan

Night Eye

Free
  • LiteFree
    • Dark mode on up to 5 websites
    • No ads
  • Pro$9/year
    • Up to 3 browsers
  • Pro Max$14/year
    • Up to 6 browsers
  • Lifetime$40/mo
    • Unlimited browsers
    • Lifetime updates

Violentmonkey

Free

No published plan breakdown. See the Violentmonkey review.

Which should you pick?

Choose Night Eye if

  • You need dark mode.
  • You want to start without paying.
  • You work on Chrome, Safari, Edge, Firefox, Opera, Brave.
  • You also want color analysis.
Night Eye review

Choose Violentmonkey if

  • You need userscript support.
  • You want to start without paying.
  • You work on Chrome, Firefox, Edge.
  • You also want clean interface.
Violentmonkey review

Questions people ask

Is Night Eye or Violentmonkey better?
Neither clearly leads. Night Eye starts at Free and Violentmonkey at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Night Eye or Violentmonkey?
Night Eye starts at Free and Violentmonkey at Free.
Does Night Eye or Violentmonkey run on more platforms?
Night Eye runs on Chrome, Safari, Edge, Firefox, Opera, Brave. Violentmonkey runs on Chrome, Firefox, Edge.
Can I use Night Eye for free?
Both have a free tier, so you can try either at no cost before committing.
What is Night Eye best used for?
Night Eye is most often used for force a consistent dark mode on websites that don't natively support one, reduce eye strain and blue light exposure during night browsing via a built-in blue-light filter, per-site color, brightness, contrast, and saturation customization, selectively convert only icons/small images rather than full images to preserve visual fidelity in dark mode. Of those, force a consistent dark mode on websites that don't natively support one and reduce eye strain and blue light exposure during night browsing via a built-in blue-light filter are not what Violentmonkey is typically brought in for.
What can Night Eye do that Violentmonkey cannot?
Night Eye covers Dark mode, Color analysis, Image preservation, Per-site settings. Violentmonkey covers Userscript support, Clean interface, Cloud sync, Script editor. Both handle Chrome support, Firefox support, Edge support, Opera support.

Answered from the vendors’ own pages

Night Eye: What is Night Eye?

Night Eye is a browser extension that applies dark mode to websites by analyzing page colors and converting them into a comfortable dark theme. It preserves photos and videos and offers customization options for brightness, contrast, and blue light filtering.

Source
Violentmonkey: Is Violentmonkey open-source?

Yes. Violentmonkey is fully open-source and available on GitHub, making it free to use and community-maintained unlike Tampermonkey which has a larger proprietary ecosystem.

Source
Night Eye: What is the pricing for Night Eye?

Night Eye Lite is free with dark mode on up to 5 websites. Night Eye Pro costs $9/year for up to 3 browsers, Night Eye Pro Max costs $14/year for up to 6 browsers, and lifetime updates cost $40 for unlimited use across 10 browsers.

Source
Violentmonkey: What browsers does Violentmonkey support?

Violentmonkey works on browsers with WebExtensions support, including Chrome, Firefox, Edge, and other Chromium-based browsers.

Source
Night Eye: Which browsers does Night Eye support?

Night Eye is available for Chrome, Safari, Microsoft Edge, Firefox, Opera, Brave, and other Chromium-based browsers.

Source
Violentmonkey: How does Violentmonkey compare to Tampermonkey in performance?

Community benchmarks show Violentmonkey uses about 15 to 30 percent less RAM on Chrome compared to Tampermonkey when managing many open tabs.

Source
Night Eye: Does Night Eye track my browsing?

No. Night Eye does not monitor, process, or store browsing activity. Webpage conversion is performed locally on the user's device. No ads appear in the free Lite version.

Source
Violentmonkey: What is the current version of Violentmonkey?

Violentmonkey reached version 2.46.0 as of July 31, 2026, with active ongoing development and regular updates to the open-source project.

Source
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