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ReadabilityTool

Free plan Web

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What ReadabilityTool is

ReadabilityTool is a free web tool that analyzes text pasted into it and reports readability scores, text statistics, and observations about complexity. It calculates six measures: Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog, SMOG, Coleman-Liau, and Automated Readability Index. Results include word and sentence counts, average sentence length, and estimated reading time. A Breakdown panel comments on sentence length and vocabulary complexity. The site says the text is processed in the browser using JavaScript and is not sent to a server, stored, or shared with third parties. No account or software installation is required, and the site says there is no limit on the amount of text analyzed. Its guidance recommends Flesch Reading Ease scores of 60–70 and grade levels of 7–9 for blog posts and articles. It also notes that SMOG needs at least 30 sentences for accuracy and identifies Grade 6 or below as a target for patient-facing materials.

Who it suits

ReadabilityTool suits writers and professionals who want to review text complexity, including bloggers, educators, healthcare professionals, legal and business writers, marketers, and technical writers.

What it does well

  • Calculates six readability formulas.
  • Reports word count, sentence count, and estimated reading time.
  • No account or installation is required.
  • All formulas are available at no cost.
  • Text is processed in the browser, according to the site.

What to know first

  • SMOG needs at least 30 sentences for accuracy.
  • The tool is available on the web.

Limits

The Free plan has no text-analysis limit. For SMOG results to be accurate, the text should contain at least 30 sentences.

Plans

PlanBilled and limitsPrice
FreeNo account · no limits on text analyzed · all six formulasFree

As readabilitytool.com lists them, read 5 Oct 2026. The maker's own page has the final word.

Getting started

  1. Open https://www.readabilitytool.com/.
  2. Paste text into the tool to analyze it.
  3. Review the readability scores and text breakdown.
  4. Use the complexity observations to assess sentence length and vocabulary.

Verdict

ReadabilityTool provides six scores and text breakdowns without an account, subscription, or analysis limit. Keep the SMOG sentence minimum in mind when interpreting that score.

Questions

How much does ReadabilityTool cost?

The Free plan costs nothing. The site says all six formulas are available at no cost, without a subscription.

Is there a free plan?

Yes. The Free plan includes all six formulas and has no limit on the amount of text analyzed.

What platforms does it support?

ReadabilityTool is available on the web.

Do I need an account or software installation?

No account or software installation is required.

How does it handle pasted text?

The site says text is processed in the browser using JavaScript and is not sent to a server, stored, or shared with third parties.

What is the SMOG limitation?

The site says SMOG requires at least 30 sentences for accuracy.

Facts from ReadabilityTool's own pages

Browser processing
The site says text is processed in the browser using JavaScript and is never sent to a server, stored, or shared with third parties. · readabilitytool.com, 5 Oct 2026
Complexity feedback
The Breakdown panel gives observations about sentence length and vocabulary complexity. · readabilitytool.com, 5 Oct 2026
Free use
The site says all six formulas are available at no cost, with no subscription and no limit on how much text users can analyze. · readabilitytool.com, 5 Oct 2026
Healthcare guidance
The healthcare page says patient-facing materials should target Grade 6 or below and identifies SMOG as a health communications formula. · readabilitytool.com, 5 Oct 2026
Intended users
The site describes use by bloggers and content writers, students and educators, healthcare professionals, legal and business writers, SEO and marketing professionals, and technical writers. · readabilitytool.com, 5 Oct 2026
No account required
The tool requires no account and no software installation. · readabilitytool.com, 5 Oct 2026
Purpose
ReadabilityTool analyzes pasted text and reports readability scores, text statistics, and plain-language observations about complexity. · readabilitytool.com, 5 Oct 2026
SEO guidance
The SEO page recommends Flesch Reading Ease scores of 60–70 and Flesch-Kincaid Grade Levels of 7–9 for blog posts and articles. · readabilitytool.com, 5 Oct 2026
Six formulas
It provides Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog, SMOG, Coleman-Liau, and Automated Readability Index scores. · readabilitytool.com, 5 Oct 2026
SMOG limitation
The site says the SMOG Index requires at least 30 sentences for accuracy. · readabilitytool.com, 5 Oct 2026
Text breakdown
Results include word count, sentence count, average sentence length, and estimated reading time. · readabilitytool.com, 5 Oct 2026

Where ReadabilityTool stands on Freedom251

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