Evaluate how easy or difficult your writing is to read. Measures word length, sentence structure, and syllable complexity in real time to provide industry-standard Flesch, Grade Level, and reading time metrics.
Runs entirely in your browser
Readability formulas estimate how hard a piece of writing is to read from two things they can count without understanding it: how long your sentences are, and how many syllables your words have. Long sentences and long words push a text out of reach for more readers, and these scores turn that into a single number you can act on. This tool computes the three most widely used at once — Flesch Reading Ease, Flesch-Kincaid Grade Level and the Gunning Fog index — and updates them as you type.
The Flesch Reading Ease score runs from 0 to 100, and higher means easier: 90–100 is very easy (about a 5th-grade level), 60–70 is plain, standard English, and anything under 30 is genuinely hard going, the register of academic and legal writing. The other two are expressed as a US school grade instead — a Flesch-Kincaid or Gunning Fog result of 8 means roughly an eighth-grader could follow it. For general web writing, aiming for a Reading Ease of about 60–70, or a grade around 8–9, keeps a page comfortable for a wide audience.
Treat the score as a guide, not a verdict. The formulas cannot judge whether your writing is clear, accurate or well argued — only how demanding its sentences and vocabulary are, so a jargon-free passage of short sentences can score well while still saying nothing. To bring a high score down, split long sentences, prefer the shorter of two words, and cut filler. Everything is measured in your browser; the text you paste is never uploaded.
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