Readability score checker

The Flesch Reading Ease formula combines two ratios: average words per sentence and average syllables per word. Longer sentences and longer words push the score down. The result lands on a 0–100 scale where higher is easier: roughly 90–100 is very easy (5th grade), 60–70 is plain English (8th–9th grade), and below 30 is best understood by university graduates.

1. Paste a representative sample of your writing.
2. Read the score and aim for 60+ for general web audiences.
3. If it is low, shorten sentences and swap multi-syllable words for shorter ones, then re-check.

Syllable counting is approximate and the formula cannot judge whether your argument is clear or your jargon is necessary. A technical reference legitimately scores lower than a consumer blog post. Use the number as a nudge toward simpler phrasing where the audience benefits, not as a rule that flattens every document to the same grade level.

The score is calculated locally in your browser — your text is never uploaded. Clearer copy also tends to improve engagement metrics, which indirectly supports SEO without targeting any keyword.

Use this tool for quick text transformation, inspection, decoding, testing, or generation without opening a heavier application. Use a project script or test suite when the same transformation must be repeated automatically.

• Check whitespace, casing, escaping, and line endings before using the result in production.
• Generated or transformed strings can be syntactically valid while still being semantically wrong for your system.
• Avoid pasting secrets unless you are comfortable handling them in the current browser session.