Free Online Text Complexity Scorer
Analyze text complexity instantly with our free text complexity scorer. Check Flesch reading ease, grade level, and sentence depth directly in your browser.
About Text Complexity Scorer
The Text Complexity Scorer evaluates the readability, structure, and grade level of any written passage. It calculates standard readability formulas, such as Flesch Reading Ease and Flesch-Kincaid Grade Level, alongside metrics like average sentence length and syllable density.
Whether you are an educator auditing classroom materials, a copywriter polishing website copy, or a student reviewing an essay, this tool provides instant feedback to ensure your writing matches your target audience. It runs entirely in your web browser, ensuring private and rapid analysis without requiring an account.
Key features
- Calculates Flesch Reading Ease and Flesch-Kincaid Grade Level
- Counts words, sentences, syllables, and characters
- Measures average sentence length and word density
- Identifies complex and polysyllabic words across paragraphs
- Runs locally in your browser for complete data privacy
- Provides instant analysis without accounts or daily limits
How to use Text Complexity Scorer
- Paste or type your text directly into the input area.
- Review the calculated readability scores and grade levels.
- Inspect sentence length and complex word counts.
- Edit your text in real time to reach your target score.
Who is it for?
- Writers and bloggers simplifying articles for broader public accessibility.
- Teachers verifying reading material suitability for specific grade levels.
- Technical writers ensuring documentation remains clear and digestible.
- Marketers optimizing landing page copy to improve comprehension and engagement.
Frequently asked questions
What is a good Flesch Reading Ease score?
A Flesch Reading Ease score between 60 and 70 is considered standard plain English, which is easily understood by 13- to 15-year-old students. Scores between 80 and 100 represent very easy reading, while scores below 50 reflect university-level complexity.
How does the text complexity scorer calculate grade level?
It evaluates the ratio of syllables to words and words to sentences using formulas such as Flesch-Kincaid. This calculation converts sentence length and word difficulty into an equivalent United States school grade level.
Is my text uploaded or stored on external servers?
No. All text processing occurs locally within your web browser using client-side JavaScript. Your text never leaves your device or gets saved to a server.
Is the text complexity scorer free to use?
Yes, this tool is completely free with no registration, subscription, or daily usage limits.
How can I lower my text complexity score?
You can simplify your text by shortening long sentences, replacing multi-syllable vocabulary with everyday words, and reducing passive sentence structures.