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Browser Extensions · head to head

Redux DevTools vs Stylus

Redux DevTools logo

Redux DevTools

Browser Extensions

Debug Redux state changes in your browser

From
Free
Rated
-
Full reviewWebsite
Stylus logo

Stylus

Browser Extensions

Restyle the web with custom CSS

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Redux DevTools significant performance overhead when tracking large state trees with many action history entries; Stylus crashes and instability when applying certain styles
  • They diverge on capability: Redux DevTools covers Action history, Stylus covers Custom CSS injection.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Redux DevTools and Stylus actually diverge.

Attributes where Redux DevTools and Stylus differ
AttributeRedux DevToolsStylus
Pricing modelopen-sourcefree
PlatformsChrome, Firefox, Edge, ElectronChrome, Firefox, Edge, Opera
Founded20152017

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 Redux DevTools

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

Only in Stylus

  • Custom CSS injection
  • Style management
  • userstyles.world integration
  • Built-in editor
  • Opera support

Both cover

  • Chrome support
  • Firefox support
  • Edge support

What people use each for

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

Redux DevTools

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

Stylus

  • Customizing website appearance with community-created CSS themesnot Redux DevTools
  • Writing personal style overrides for specific websitesnot Redux DevTools
  • Managing multiple styles across different websites automaticallynot Redux DevTools
  • Searching and installing user-styles for current websitesnot Redux DevTools
  • Migrating style collections from Stylish extensionnot Redux DevTools

Where each one falls short

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

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

Stylus

  • Crashes and instability when applying certain styles
  • No visual element selector tool for identifying page elements to style
  • Security risk if downloading and applying untrusted user-created styles

Pricing, plan by plan

Redux DevTools

Free

No published plan breakdown. See the Redux DevTools review.

Stylus

Free
  • FreeFree
    • Custom CSS
    • Style library
    • Style editor

Which should you pick?

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

Choose Stylus if

  • You need custom css injection.
  • You want to start without paying.
  • You work on Chrome, Firefox, Edge, Opera.
  • You also want style management.
Stylus review

Questions people ask

Is Redux DevTools or Stylus better?
Neither clearly leads. Redux DevTools starts at Free and Stylus at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Redux DevTools or Stylus?
Redux DevTools starts at Free and Stylus at Free.
Does Redux DevTools or Stylus run on more platforms?
Redux DevTools runs on Chrome, Firefox, Edge, Electron. Stylus runs on Chrome, Firefox, Edge, Opera.
Can I use Redux DevTools for free?
Both have a free tier, so you can try either at no cost before committing.
What is Redux DevTools best used for?
Redux DevTools is most often used for redux development and debugging tool for javascript applications, action replay and time-travel debugging for state management. Of those, redux development and debugging tool for javascript applications and action replay and time-travel debugging for state management are not what Stylus is typically brought in for.
What can Redux DevTools do that Stylus cannot?
Redux DevTools covers Action history, State diff, Time-travel debugging, State export. Stylus covers Custom CSS injection, Style management, userstyles.world integration, Built-in editor. 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
Stylus: Is Stylus free?

Yes. Stylus is completely free and open-source, available for Chrome, Firefox, Edge, and Opera browsers.

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
Stylus: Can I use Stylus to change the browser UI?

No. Due to WebExtensions security restrictions, Stylus can only customize website pages, not the browser interface itself.

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
Stylus: What CSS pre-processors does Stylus support?

Stylus supports CSS, LESS, and Stylus syntax with built-in linting using Stylelint and CSSLint-mod with customizable rules.

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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