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Readability analyser

Get a Flesch-Kincaid reading ease score, grade level, average sentence length, and reading time for any text.

— Reading ease

— Grade level

— Read time

100% private. All processing happens locally in your browser — no files or data are ever sent to a server.

How to use Readability analyser

01 Paste or type your text into the input area
02 Results update in real time — no button press needed
03 Use the Copy button to copy the output to your clipboard

Frequently asked questions

Common questions about Readability analyser.

Is Readability analyser free to use?

Yes, Readability analyser is completely free. No account, subscription, or payment is ever required — just open the page and start using it.

Does Readability analyser upload my data to a server?

No. Readability analyser runs entirely in your web browser using client-side JavaScript. Your files, text, and data never leave your device, making it 100% private.

Can I use Readability analyser on my phone or tablet?

Yes. Readability analyser is fully responsive and works on all modern smartphones, tablets, and desktop browsers without installing any app.

Is there a character or word limit?

There is no hard limit built into Readability analyser. Very large inputs (millions of characters) may slow down some browsers, but typical documents process instantly.

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About Readability analyser

The Readability Analyser uses the Flesch-Kincaid formula to measure how easy or difficult a piece of text is to read. It produces a Reading Ease score from 0–100 — higher is easier — and a Grade Level estimate corresponding to US school years. Professional writing typically targets a Reading Ease score of 60–70 and a Grade Level of 8–10. The tool also shows average sentence length, average syllables per word, and an estimated reading time. It is useful for writers, content marketers, and educators checking content accessibility before publishing.