SEO Tools
Content Readability Analyzer
Score a draft against five readability formulas at once, then work down the list of sentences it flags: the ones running long, the ones written in the passive voice, and the paragraphs that have grown past a screenful. Runs entirely in your browser — nothing you paste is uploaded.
📝 Content Input
💡 About this tool:
• Five formulas: Flesch Reading Ease, Flesch-Kincaid, Gunning Fog, SMOG and ARI, plus a consensus grade
• Flags passive voice, adverb load, missing transitions and overlong paragraphs
• Reviews every sentence individually so you can see exactly what to cut
• Runs entirely in your browser — your content never leaves this page
• Five formulas: Flesch Reading Ease, Flesch-Kincaid, Gunning Fog, SMOG and ARI, plus a consensus grade
• Flags passive voice, adverb load, missing transitions and overlong paragraphs
• Reviews every sentence individually so you can see exactly what to cut
• Runs entirely in your browser — your content never leaves this page
Paste your content above to unlock readability insights.
Frequently asked questions
Is readability a Google ranking factor?
No. Google has never used a readability score as a ranking signal, and there is no evidence it measures one. Readability matters for a more ordinary reason: people leave pages they find hard work, and a page nobody finishes is a page that earns no links, no shares and no conversions. Fix readability for the reader, not for the algorithm.
What readability score should I aim for?
For content aimed at a general audience, a Flesch Reading Ease of 60 or above and a grade level around 8 or 9. Specialist or technical writing can justifiably sit higher — a page for compliance officers does not need to read like a children's book. What matters more than the absolute number is whether the score matches the audience you actually have.
Why do the five formulas disagree with each other?
Each weights sentence length and word length differently, and SMOG in particular runs high because it keys off polysyllabic words alone. That spread is useful information: when all five cluster together, the reading level is consistent throughout; when they diverge sharply, you usually have a mix of very short and very long sentences. The consensus figure shown here is the median of the four grade-level formulas, which is more stable than any one of them.
How does the tool detect passive voice?
It looks for a form of "to be" or "to get" followed by a past participle, including the common irregular forms. That catches most real passives, but it is a pattern match rather than a parser, so it will occasionally flag a sentence such as "the results are complete" that is not passive at all. Treat the flags as sentences worth rereading, not as errors.
How are sentences and syllables counted?
Sentences are split on full stops, question marks and exclamation marks, with abbreviations (Dr., e.g., U.S.) and decimal numbers protected so they do not create false sentence breaks — a common source of wrong scores in simpler tools. Syllables are counted with a vowel-group heuristic that handles silent endings and a dictionary of common exceptions. Both are close but not perfect, which is another reason to read a flagged section rather than trusting the number outright.