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Browser Extensions · head to head

Mercury Reader vs React Developer Tools

M

Mercury Reader

Browser Extensions

Clear clutter from articles instantly

From
Free
Rated
-
Full reviewWebsite
React Developer Tools logo

React Developer Tools

Browser Extensions

Debug React applications in your browser

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Mercury Reader mercury Reader's underlying engine (Postlight Parser) is free open source software licensed under Apache License 2.0, per the GitHub repository, with no paid tier; React Developer Tools react Developer Tools is only available as a Chrome browser extension. No support for other browsers mentioned.
  • They diverge on capability: Mercury Reader covers Content extraction, React Developer Tools covers Component inspection.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Mercury Reader and React Developer Tools actually diverge.

Attributes where Mercury Reader and React Developer Tools differ
AttributeMercury ReaderReact Developer Tools
Founded20152004

Identical on both: starting price (Free), pricing model (free), free tier (Yes), platforms (Chrome, Firefox, Edge), 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 Mercury Reader

  • Content extraction
  • Clean reading view
  • Custom themes
  • Font customization

Only in React Developer Tools

  • Component inspection
  • Props/State viewing
  • Performance profiler
  • Hooks debugging

Both cover

  • Chrome support
  • Firefox support
  • Edge support

What people use each for

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

Mercury Reader

No use cases recorded yet. See the Mercury Reader review.

React Developer Tools

  • Debugging React components during developmentnot Mercury Reader
  • Inspecting component state and propsnot Mercury Reader
  • Performance profiling of React applicationsnot Mercury Reader

Where each one falls short

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

Mercury Reader

  • Mercury Reader's underlying engine (Postlight Parser) is free open source software licensed under Apache License 2.0, per the GitHub repository, with no paid tier

React Developer Tools

  • React Developer Tools is only available as a Chrome browser extension. No support for other browsers mentioned.

Pricing, plan by plan

Mercury Reader

Free
  • FreeFree
    • Clutter removal
    • Clean reading
    • Custom themes

React Developer Tools

Free
  • FreeFree
    • Component tree
    • Props inspection
    • State tracking

Which should you pick?

Choose Mercury Reader if

  • You need content extraction.
  • You want to start without paying.
  • You work on Chrome, Firefox, Edge.
  • You also want clean reading view.
Mercury Reader review

Choose React Developer Tools if

  • You need component inspection.
  • You want to start without paying.
  • You work on Chrome, Firefox, Edge.
  • You also want props/state viewing.
React Developer Tools review

Questions people ask

Is Mercury Reader or React Developer Tools better?
Neither clearly leads. Mercury Reader starts at Free and React Developer Tools at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Mercury Reader or React Developer Tools?
Mercury Reader starts at Free and React Developer Tools at Free.
Does Mercury Reader or React Developer Tools run on more platforms?
Both run on Chrome, Firefox, Edge, so platform support will not decide this one for you.
Can I use Mercury Reader for free?
Both have a free tier, so you can try either at no cost before committing.
What can Mercury Reader do that React Developer Tools cannot?
Mercury Reader covers Content extraction, Clean reading view, Custom themes, Font customization. React Developer Tools covers Component inspection, Props/State viewing, Performance profiler, Hooks debugging. Both handle Chrome support, Firefox support, Edge support.

Answered from the vendors’ own pages

React Developer Tools: How much does React Developer Tools cost?

React Developer Tools is completely free. It is a free browser extension with no subscription fees or costs.

Source
React Developer Tools: Is React Developer Tools available for download?

Yes. React Developer Tools is available as a free extension on the Chrome Web Store for download at no cost.

Source
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