Readability Checker

Paste any text and get its Flesch Reading Ease score and grade level instantly, as you type. Entirely in your browser, nothing is sent anywhere.

Why use our Readability Checker

The real Flesch formulas, not a guess

Flesch Reading Ease and Flesch-Kincaid Grade Level, the same widely used, documented formulas, not a proprietary black-box score.

Updates as you type

No submit button needed, paste or edit your text and the score recalculates instantly.

Flags your hardest words

See exactly which words are driving your score up, the specific complex words, not just a single number.

100% local, nothing uploaded

Your text is analyzed entirely in your browser, never sent to any server.

Paste your text

Real Readability Checker example: before vs. after

Simplifying a product page written by an engineer, dense with jargon, for a general audience.

Before · Original

Flesch score, difficult

Long sentences and technical jargon made the page a graduate-level read for a page meant to convert casual visitors.

After · Simplified

Flesch score, standard

Shorter sentences and simpler word choices, easily readable by a general 8th-9th grade audience, matching web content best practice.

Frequently Asked Questions

What's a good Flesch Reading Ease score for web content?

60-70 is generally recommended for general audience web content, readable by most 13-15 year olds. Technical or academic content naturally scores lower, and that's appropriate for its audience.

Is a lower score always bad?

No, it depends entirely on your audience. Legal, medical, or academic content is expected to score lower. The score is a tool for matching your writing to your actual readers, not a universal target.

How is grade level different from the reading ease score?

Reading ease is a 0-100 scale, higher is easier. Grade level estimates the US school grade needed to understand the text on first reading, they're two views of the same underlying sentence and word complexity.

Does this check grammar or spelling?

No, this only measures sentence and word complexity for readability, it doesn't check grammar, spelling, or factual accuracy.

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