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Browser Extensions · head to head

JSON Viewer vs Redux DevTools

JSON Viewer logo

JSON Viewer

Browser Extensions

View JSON documents in the browser

From
Free
Rated
-
Full reviewWebsite
Redux DevTools logo

Redux DevTools

Browser Extensions

Debug Redux state changes in your browser

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: JSON Viewer the project is MIT licensed open source code hosted on GitHub with no vendor and no paid tier; Redux DevTools significant performance overhead when tracking large state trees with many action history entries
  • They diverge on capability: JSON Viewer covers JSON formatting, Redux DevTools covers Action history.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which JSON Viewer and Redux DevTools actually diverge.

Attributes where JSON Viewer and Redux DevTools differ
AttributeJSON ViewerRedux DevTools
Pricing modelfreeopen-source
PlatformsChrome, Firefox, EdgeChrome, Firefox, Edge, Electron

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Browser Extensions), founded (2015).

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 JSON Viewer

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

Only in Redux DevTools

  • Action history
  • State diff
  • Time-travel debugging
  • State export

Both cover

  • Chrome support
  • Firefox support
  • Edge support

What people use each for

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

JSON Viewer

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

Redux DevTools

  • Redux development and debugging tool for JavaScript applicationsnot JSON Viewer
  • Action replay and time-travel debugging for state managementnot JSON Viewer

Where each one falls short

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

JSON Viewer

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

Redux DevTools

  • Significant performance overhead when tracking large state trees with many action history entries
  • Memory consumption increases with action history, especially with large datasets of 11,000+ records
  • UI becomes sluggish when LogMonitor contains many actions in history
  • Requires manual configuration of maxAge and sanitizers to optimize performance

Pricing, plan by plan

JSON Viewer

Free
  • FreeFree
    • Syntax highlighting
    • Collapsible tree
    • Search

Redux DevTools

Free

No published plan breakdown. See the Redux DevTools review.

Which should you pick?

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

Choose Redux DevTools if

  • You need action history.
  • You want to start without paying.
  • You work on Chrome, Firefox, Edge, Electron.
  • You also want state diff.
Redux DevTools review

Questions people ask

Is JSON Viewer or Redux DevTools better?
Neither clearly leads. JSON Viewer starts at Free and Redux DevTools at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, JSON Viewer or Redux DevTools?
JSON Viewer starts at Free and Redux DevTools at Free.
Does JSON Viewer or Redux DevTools run on more platforms?
JSON Viewer runs on Chrome, Firefox, Edge. Redux DevTools runs on Chrome, Firefox, Edge, Electron.
Can I use JSON Viewer for free?
Both have a free tier, so you can try either at no cost before committing.
What can JSON Viewer do that Redux DevTools cannot?
JSON Viewer covers JSON formatting, Syntax highlighting, Tree view, Search functionality. Redux DevTools covers Action history, State diff, Time-travel debugging, State export. Both handle Chrome support, Firefox support, Edge support.

Answered from the vendors’ own pages

Redux DevTools: Is Redux DevTools free?

Yes, Redux DevTools is completely free and open-source under the MIT license. It is available as a browser extension for Chrome, Firefox, and Edge, and can also be used as a standalone app or React component.

Source
Redux DevTools: What browsers does Redux DevTools support?

Redux DevTools is available as a browser extension for Chrome, Firefox, and Edge. It can also be integrated directly into applications as a React component or standalone app.

Source
Redux DevTools: Does Redux DevTools work with production builds?

Redux DevTools is designed for development and should be disabled in production builds. Keeping it enabled in production can impact application performance due to state logging overhead.

Source
Redux DevTools: How do I enable time-travel debugging with Redux DevTools?

Redux DevTools allows you to step back through dispatched actions, canceling actions to return to previous application states. This time-travel debugging is built into the core functionality of the extension.

Source
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