Readability Checker

What this tool does

The Readability Checker analyzes your text and returns a Flesch Reading Ease score, an approximate reading level, average sentence and word length, and a list of actionable suggestions.

Readability affects whether people finish what you write. Text that scores as difficult to read has higher bounce rates and lower comprehension, especially on mobile. This tool surfaces the sentences and word choices that make your writing harder than it needs to be.

The score is a transparent, deterministic formula — not a proprietary or "AI" mystery. You can see exactly how it is calculated in the explanation below.

How to use it

1. Paste or type your text.
2. Read the Flesch score and reading level.
3. Look at average sentence length, average word length, and the long-sentence count.
4. Apply the suggestions, then re-check to watch the score improve.

How it works

• The Flesch Reading Ease formula is: 206.835 − (1.015 × words per sentence) − (84.6 × syllables per word).
• Scores range from 0 to 100. Higher is easier: 90–100 is very easy (5th grade), 60–70 is plain English (8th–9th grade), and below 30 is very difficult (college graduate).
• Syllable counts use a heuristic based on vowel groups, which is accurate for most English words but not a perfect linguistic model. Treat the result as a useful signal, not a definitive verdict.

Example

A sentence like "We leveraged a comprehensive utilization framework" scores poorly because of long words. "We used a complete system" says the same thing and scores far higher.

Common questions