Free online readability checker—Flesch Reading Ease and Flesch-Kincaid grade level in your browser, plus word and sentence stats. No upload, no login.
Flesch Reading Ease (0–100, higher is easier), Flesch-Kincaid Grade Level (U.S. school grade), plus word count, sentence count, average words per sentence, and a label band from very easy to very difficult.
Paste your draft and read the Flesch Reading Ease score plus Flesch-Kincaid grade level instantly. Higher ease scores mean easier reading; grade level estimates U.S. school years. Scoring stays in your browser—nothing is uploaded.
Plain language for general audiences often targets 60–70 (roughly 8th–9th grade). Technical docs may score lower intentionally. Marketing landing pages usually aim for 70+ so skimmers grasp benefits quickly.
Scores map to bands: 80+ very easy, 60–79 easy, 40–59 standard, 20–39 difficult, below 20 very difficult. The heading above results reflects your current band for quick scanning.
Flesch formulas assume English syllable patterns. Non-English paste may produce misleading scores. Use Word Counter for length stats on any language.
Inputs up to 200,000 characters are supported. Split book chapters or long policy documents if the browser tab feels sluggish during analysis.
English words use a heuristic vowel-group count—not dictionary lookup. Short words count as one syllable. Technical jargon and acronyms may skew grade level slightly.
No. Scoring runs entirely in your browser. Draft blog posts and internal memos stay private.
Yes. Free online readability checker with no login—run Flesch scores anytime in your browser.