SEO Tools

Readability Scorer

Use Readability Scorer to score content readability using five industry-standard formulas. The tool produces a multi-formula readability report with grade level, passive voice, and sentence analysis. Scores include Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, SMOG, and Coleman-Liau.

Free SEO analysis No sign-up required Instant results
Sentence Length Distribution
Passive Voice
Transition Words Coverage
Difficult Words

Features

  • Browser-only HTML analysis. No upload
  • Pass, warn, fail, and info status labels
  • Export report as JSON
  • Scores include Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, SMOG, and Coleman-Liau.

How to use it

  1. Paste the HTML source of a page into the input panel.
  2. Click Check HTML to run the analysis in your browser.
  3. Review the report sections.
  4. Export as JSON or copy the summary.

Use cases

  • Audit on-page SEO before publishing or updating a page
  • Check social sharing metadata before a campaign
  • Verify heading structure and schema markup after a CMS change

Limitations

  • JavaScript-rendered content is not evaluated. Only the static HTML response is analysed.
  • Paste the raw HTML source. Relative paths may not resolve correctly without the original base URL.
  • Scores include Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, SMOG, and Coleman-Liau.
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Questions & answers

Frequently asked

Does Readability Scorer upload my data?

Your file or text is processed in your browser and is not uploaded.

What does Readability Scorer check?

It produces a multi-formula readability report with grade level, passive voice, and sentence analysis. Scores include Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, SMOG, and Coleman-Liau.

Does this replace Google Search Console?

No. This tool reads static HTML and provides a quick informational check. For authoritative indexing data and crawl reports, use Google Search Console.