Free Tool

Readability Checker

Flesch Reading Ease and Flesch–Kincaid grade level, with sentence stats and passive-voice flags — instant and private.

Add at least one full sentence to see your readability score.
Open the Word Counter →Calculate reading time →Analyze a headline →

Paste your copy and the readability checker scores it with the two standard published formulas — Flesch Reading Ease (0–100, higher is easier) and the Flesch–Kincaid grade level — and shows the sentence, word, and syllable stats behind the score. It also flags sentences that read as passive voice so you can tighten them. It runs entirely in your browser using deterministic formulas; nothing is uploaded and no AI rewrites your text.

How the Readability Checker Works

  1. 1Paste or type your text into the box.
  2. 2Read your Flesch Reading Ease (0–100) and Flesch–Kincaid grade level.
  3. 3Scan the average words-per-sentence and syllables-per-word behind the score.
  4. 4Tighten the flagged passive-voice sentences, then re-check.
Want copy that scores AND sells? Hire a CopyCrest writer →A readable score is the floor, not the ceiling. Our vetted human writers make it clear and persuasive. CopyCrest is human-only — no AI drafts.

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Frequently Asked Questions