Free Readability Score Checker
A free Flesch Reading Ease calculator, Gunning Fog Index checker, and reading level checker in one tool. Paste any text to instantly see 5 readability scores, sentiment analysis, and top keywords. 100% client-side — your text never leaves your browser.
Your Text
0 characters
Readability Scores
Comparison: Text B
Reading Statistics
Sentiment Analysis
Score
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Label
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Top 10 Keywords (TF-IDF)
Saved Analyses
Paste your text and click "Analyze Text"
Works with articles, essays, emails, reports, and more
How to Use This Tool
- Paste your text into the input box on the left (articles, blog posts, essays, emails, reports).
- Click "Analyze Text" to instantly see all 5 readability scores, sentiment, and keywords.
- Compare texts by clicking "+ Compare with another text" and pasting a second sample.
- Save or share your results using the buttons below the scores.
Understanding the Scores
Flesch Reading Ease (0-100): Higher = easier. 60-70 is standard for most audiences. Below 30 is academic/graduate level.
Flesch-Kincaid Grade: US school grade level needed to understand the text. Grade 8 = readable by the average adult.
Gunning Fog Index: Estimates years of formal education needed. Ideal for general audiences: 7-8.
Coleman-Liau Index: Based on character counts rather than syllables. More reliable for technical text.
Automated Readability Index (ARI): Maps to US grade levels using characters per word and words per sentence.
How We Compare
| Tool | Price | Signup | Scores | Privacy |
|---|---|---|---|---|
| Hemingway App | $20 | No | 1 | Local |
| Readable.io | $8/mo | Yes | 3 | Cloud |
| Grammarly | $12/mo | Yes | 1 | Cloud |
| Blackmount | Free | No | 5 | Local |
Frequently Asked Questions
Is my text sent to a server?
No. All analysis runs 100% in your browser using JavaScript. Your text never leaves your device.
What readability score should I aim for?
For general audiences, aim for a Flesch Reading Ease of 60-70 (about 8th grade level). For academic writing, 30-50 is typical.
How does sentiment analysis work?
We use a VADER-style algorithm with a 500+ word sentiment lexicon, booster words, negation detection, and punctuation emphasis.
What are TF-IDF keywords?
Term Frequency-Inverse Document Frequency ranks words by how important they are to your text, filtering out common stopwords.
Track Readability Across Your Browsing
Get instant readability scores on every page you visit with the Blackmount ReadScore Chrome extension.
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