Readability Checker
Flesch, Flesch-Kincaid and Gunning Fog scores, plus the sentences to split.
About this tool
Paste an email, landing page, article or report; the scores and the reasons behind them appear as you type, along with the sentences that most need splitting. Nothing leaves your browser.
What the scores mean and what they don't
Flesch Reading Ease runs from 0 to 100: newspapers sit around 60β70 (plain English, an eighth- or ninth-grade level), popular fiction higher, academic writing and legal text in the 30s. Flesch-Kincaid turns the same two ingredients β words per sentence and syllables per word β into a US school grade; Gunning Fog counts words of three syllables or more instead. All three reward short sentences and short words, which is the whole insight: they measure surface difficulty, not clarity, so a long sentence of simple words scores fine and a crisp technical paragraph scores badly. Honest use: aim for grade 7β9 for landing pages, support articles, government and health information (the UK and US governments both target about that); don't chase a low score in a contract or a paper where precision needs the long words. Syllables are estimated by rule, as the formulas' authors did. The summarizer shortens; the word counter gives reading time; keyword density shows the vocabulary.
Frequently asked questions
What is a good Flesch score?
60β70 for general audiences (plain English), 70β80 for consumer and support content, 50β60 is acceptable for professional readers. Below 30 is hard for almost everyone.
Why does a technical text score badly?
Long words and long sentences are what the formulas count. A precise technical paragraph can be perfectly clear to its audience and still score βdifficultβ β the score is a prompt, not a verdict.
How do I improve the score fastest?
Split the longest sentences (listed for you), cut adverbs, and prefer the short word when it means the same. Passive constructions add length without meaning.
Is the text uploaded?
No β counting runs in your browser.