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Browser Extensions · head to head

ColorZilla vs Userscripts

ColorZilla logo

ColorZilla

Browser Extensions

Advanced color picker and eyedropper

From
Free
Rated
-
Full reviewWebsite
Userscripts logo

Userscripts

Browser Extensions

Open-source userscript manager for Safari on Mac and iOS

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: ColorZilla no pricing information published on main website or pricing page, making cost structure unclear to potential users; Userscripts safari cannot let extensions bypass a site's Content Security Policy, so strict sites produce "Refused to execute a script" errors that the @inject-into workaround does not always fix.
  • They diverge on capability: ColorZilla covers Color picker, Userscripts covers Built-in script editor.
  • Prices and features above were last checked on 15 September 2026.

Where they differ

Only the attributes on which ColorZilla and Userscripts actually diverge.

Attributes where ColorZilla and Userscripts differ
AttributeColorZillaUserscripts
Pricing modelfreeopen-source
PlatformsChrome, Firefox, EdgeSafari, macOS, iOS
Founded2007Unknown

Identical on both: starting price (Free), 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 ColorZilla

  • Color picker
  • Eyedropper tool
  • Gradient generator
  • Palette analyzer
  • Chrome support
  • Firefox support
  • Edge support

Only in Userscripts

  • Built-in script editor
  • Standard metadata support
  • GM API
  • Remote script updating
  • iCloud sync
  • Per-page popup

What people use each for

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

ColorZilla

  • Extracting exact color values from website designs instantlynot Userscripts
  • Generating CSS gradients without returning to Photoshopnot Userscripts
  • Analyzing and converting visual color palettes to codenot Userscripts

Userscripts

  • Running userscripts on Safari without paying for Tampermonkeynot ColorZilla
  • Running userscripts on an iPhone or iPadnot ColorZilla
  • Writing scripts on a Mac and syncing them to iOSnot ColorZilla
  • Blocking or restyling site elements Safari content blockers cannot reachnot ColorZilla
  • Keeping a script library under an open-source licencenot ColorZilla

Where each one falls short

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

ColorZilla

  • No pricing information published on main website or pricing page, making cost structure unclear to potential users
  • No free tier or trial option clearly advertised, limiting ability to test features before purchase

Userscripts

  • Safari cannot let extensions bypass a site's Content Security Policy, so strict sites produce "Refused to execute a script" errors that the @inject-into workaround does not always fix.
  • Apple only. There is no Chrome, Firefox or Edge build, so it cannot be a cross-browser answer.
  • iCloud sync is documented as having delays, which is awkward when editing the same script on two devices.
  • Requires macOS 12 and Safari 14.1, or iOS 15.1, so older Apple hardware is excluded.
  • GPL v3 means a commercial licence is required for non-open-source use, which matters if you are embedding rather than just using it.

Pricing, plan by plan

ColorZilla

Free
  • FreeFree
    • Color picker
    • Eyedropper
    • Gradient generator

Userscripts

Free
  • FreeFree
    • Full functionality
    • GPL v3 licensed
    • macOS, iOS and iPadOS

Which should you pick?

Choose ColorZilla if

  • You need color picker.
  • You want to start without paying.
  • You work on Chrome, Firefox, Edge.
  • You also want eyedropper tool.
ColorZilla review

Choose Userscripts if

  • You need built-in script editor.
  • You want to start without paying.
  • You work on Safari, macOS, iOS.
  • You also want standard metadata support.
Userscripts review

Questions people ask

Is ColorZilla or Userscripts better?
Neither clearly leads. ColorZilla starts at Free and Userscripts at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, ColorZilla or Userscripts?
ColorZilla starts at Free and Userscripts at Free.
Does ColorZilla or Userscripts run on more platforms?
ColorZilla runs on Chrome, Firefox, Edge. Userscripts runs on Safari, macOS, iOS.
Can I use ColorZilla for free?
Both have a free tier, so you can try either at no cost before committing.
What is ColorZilla best used for?
ColorZilla is most often used for extracting exact color values from website designs instantly, generating css gradients without returning to photoshop, analyzing and converting visual color palettes to code. Of those, extracting exact color values from website designs instantly and generating css gradients without returning to photoshop are not what Userscripts is typically brought in for.
What can ColorZilla do that Userscripts cannot?
ColorZilla covers Color picker, Eyedropper tool, Gradient generator, Palette analyzer. Userscripts covers Built-in script editor, Standard metadata support, GM API, Remote script updating.

Answered from the vendors’ own pages

ColorZilla: How much does ColorZilla cost?

ColorZilla does not publish pricing on its website. The site describes browser extensions for Firefox and Chrome, plus an online CSS gradient editor, but cost information is not available. Users must contact the company directly or check browser extension marketplaces for availability and cost details.

Source
Userscripts: Is Userscripts for Safari free?

Yes, free on the App Store and licensed under GPL v3. A commercial licence is required for use in something that is not itself open source.

Source
ColorZilla: Is ColorZilla free to use?

The website does not specify whether ColorZilla tools are free or paid. While browser extensions are often offered free in extension stores, the online tools and their pricing model are not documented on the main site.

Source
Userscripts: Does it work on iPhone?

Yes, on iOS and iPadOS 15.1 or later, which makes it one of the few ways to run userscripts on an iPhone.

Source
Userscripts: Why do I get "Refused to execute a script" errors?

Safari does not let extensions bypass a site's Content Security Policy the way other browsers do. The documented workaround is changing the script's @inject-into setting, though it does not resolve every case.

Source
Userscripts: Do my scripts sync between Mac and iPhone?

Yes, over iCloud, though the project notes the sync can be delayed rather than immediate.

Source
Userscripts: What are the system requirements?

macOS 12 or later with Safari 14.1 or later, or iOS and iPadOS 15.1 or later.

Source
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