ReadabilityTool

At a glance

• Editor score
  7.3 / 10
• Pricing
  Free plan
• Best for
  Simple free six-formula checking
• Free plan
  Yes
• Paid from
  Free
• Readability formulas
  6 formulas
• Facts checked
  20 Sep 2026

• Where it wins

  • Six named readability formulas cover grade-level and reading-ease analysis.
  • Word, sentence, reading-time, and average-length statistics are included.
  • Browser-based access requires no account or installation.

• Where it doesn't

  • Web access is the product's only listed platform.
  • The workflow centers on pasted text rather than broader integrations.
  • It is focused on analysis, with limited editing functionality described.

Our verdict on ReadabilityTool

ReadabilityTool is a free browser-based checker for people who need a quick view of how difficult written text may be to read. Users paste text into the web interface and receive six readability scores: Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog Index, SMOG Index, Coleman-Liau Index, and Automated Readability Index. It is positioned for bloggers, content writers, students, educators, healthcare professionals, legal and business writers, SEO professionals, and technical writers. The no-account, no-installation workflow suits occasional checks as well as repeat editorial reviews.

Its strongest feature is the breadth of formula coverage within a simple free tool. Alongside the scores, ReadabilityTool reports word and sentence counts, average sentence length, estimated reading time, and plain-language observations about text complexity. That combination gives writers both named metrics and practical context for deciding whether a passage may be too demanding. The six-formula approach is useful when different audiences or editorial standards call for more than one readability lens, while the sentence analysis and clarity observations help turn a score into a clearer review of the draft.

ReadabilityTool keeps its scope narrow: browser-based pasted-text analysis. The vendor says text is processed locally in the browser rather than sent to or stored on a server, which may suit writers reviewing sensitive drafts. The product is a good fit for straightforward readability checks without account setup, installation, or a paid tier. Choose it if you want accessible formula-based analysis and basic clarity signals; choose another checker if your workflow depends on an extension, API, or a wider connected platform ecosystem.

Your product? Our editors can test ReadabilityTool in depth and publish a review, labelled as paid · from $149/mo →

ReadabilityTool pricing

ReadabilityTool fact sheet

Alternatives to ReadabilityTool

• Eclipse Readability StudioA free, open-source desktop checker for detailed multilingual document analysis.9.4
• ReadableA deep web and document readability checker for professional content teams.9.2
• Check ReadabilityA free browser checker combining nine formulas with practical clarity guidance.9.0

See all ReadabilityTool alternatives →

Featured on iTechGuides

ReadabilityTool is listed in our Readability Checkers directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update