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Software · head to head

Violentmonkey vs JSON Viewer

Violentmonkey logo

Violentmonkey

Software

Open source userscript manager

From
Free
Rated
-
Full reviewWebsite
JSON Viewer logo

JSON Viewer

Software

View JSON documents in the browser

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Violentmonkey smaller script ecosystem compared to Tampermonkey which has larger user base and more available scripts; JSON Viewer the project is MIT licensed open source code hosted on GitHub with no vendor and no paid tier
  • They diverge on capability: Violentmonkey covers Userscript support, JSON Viewer covers JSON formatting.

Where they differ

Only the attributes on which Violentmonkey and JSON Viewer actually diverge.

Attributes where Violentmonkey and JSON Viewer differ
AttributeViolentmonkeyJSON Viewer
Pricing modelUnknownfree
Founded20132015

Identical on both: starting price (Free), free tier (Yes), platforms (Chrome, Firefox, Edge), user rating (Not yet rated), category (Unknown).

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 Violentmonkey

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

Only in JSON Viewer

  • JSON formatting
  • Syntax highlighting
  • Tree view
  • Search functionality

Both cover

  • Chrome support
  • Firefox support
  • Edge support

What people use each for

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

Violentmonkey

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

JSON Viewer

No use cases recorded yet. See the JSON Viewer review.

Where each one falls short

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

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

JSON Viewer

  • The project is MIT licensed open source code hosted on GitHub with no vendor and no paid tier

Pricing, plan by plan

Violentmonkey

Free

No published plan breakdown. See the Violentmonkey review.

JSON Viewer

Free
  • FreeFree
    • Syntax highlighting
    • Collapsible tree
    • Search

Which should you pick?

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

Choose JSON Viewer if

  • You need json formatting.
  • You want to start without paying.
  • You work on Chrome, Firefox, Edge.
  • You also want syntax highlighting.
JSON Viewer review

Questions people ask

Is Violentmonkey or JSON Viewer better?
Neither clearly leads. Violentmonkey starts at Free and JSON Viewer at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Violentmonkey or JSON Viewer?
Violentmonkey starts at Free and JSON Viewer at Free.
Does Violentmonkey or JSON Viewer run on more platforms?
Both run on Chrome, Firefox, Edge, so platform support will not decide this one for you.
Can I use Violentmonkey for free?
Both have a free tier, so you can try either at no cost before committing.
What is Violentmonkey best used for?
Violentmonkey is most often used for run open-source userscripts to customize or automate web pages, import scripts compatible with greasemonkey and tampermonkey formats, sync scripts and settings across browsers via dropbox, onedrive, google drive, or webdav, batch import/export scripts as zip files. Of those, run open-source userscripts to customize or automate web pages and import scripts compatible with greasemonkey and tampermonkey formats are not what JSON Viewer is typically brought in for.
What can Violentmonkey do that JSON Viewer cannot?
Violentmonkey covers Userscript support, Clean interface, Cloud sync, Script editor. JSON Viewer covers JSON formatting, Syntax highlighting, Tree view, Search functionality. Both handle Chrome support, Firefox support, Edge support.

Answered from the vendors’ own pages

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
Violentmonkey: What browsers does Violentmonkey support?

Violentmonkey works on browsers with WebExtensions support, including Chrome, Firefox, Edge, 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
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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