Is the Readability free to use?

Yes, the Readability is completely free. There is no sign-up, no account required, and no limit on how often you can use it.

Does the Readability use AI?

The Readability uses standard algorithms and rule-based logic, not AI or machine learning. Your text is processed in your browser only and is not sent to any external service.

What devices does the Readability work on?

The Readability works on any device with a modern web browser — desktop, laptop, tablet, or phone. It is mobile-friendly and works offline once the page has loaded.

✍️ Writing & SEO

Readability Checker

Check reading level of any text using Flesch-Kincaid, Gunning Fog and other readability formulas. See target age range. Free.

The Readability is a free online tool that helps you check reading level of any text using flesch-kincaid, gunning fog and other readability formulas. see target age range. free It runs in your browser with no sign-up, downloads, or installation needed. All processing happens locally — your data stays on your device.

Paste at least a paragraph of text to check readability. Results are most accurate with 100+ words.

How to use

Flesch Reading Ease

Scores from 0–100. Higher = easier to read. 60–70 is the sweet spot for general web content (plain English). Under 30 is very difficult (academic). Over 80 is easy (young readers). Most popular news websites score 60–65.

Other formulas

Flesch-Kincaid Grade Level converts to US school grade (add 5 for UK year). Gunning Fog estimates the years of education needed. SMOG (Simple Measure of Gobbledygook) counts polysyllabic words. All use sentence length and word complexity as inputs.

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