Readability Test – Check Flesch Reading Ease & Grade Level
About the Readability Test
The Readability Test analyzes your text and instantly calculates its Flesch Reading Ease score and Flesch-Kincaid Grade Level, along with word, sentence, and syllable counts. It tells you exactly how easy or difficult your writing is to understand, from “Very Easy” content a young reader can follow to “Very Difficult” text suited for university graduates.
It’s built for bloggers, students, content marketers, and technical writers who need to match their writing to a target audience. Before running your text through this tool, the Grammar Checker can catch structural errors that skew your scores, and the Passive Voice Checker helps simplify overly complex sentences that often lower a readability score.
The BigToolSite Team tested this tool across short paragraphs, long-form articles, and technical documentation to confirm the Flesch scoring and grade-level calculations stay accurate across a wide range of writing styles.
How to Use the Readability Test
- Paste your text into the input field (up to 500 words per test).
- Click Test Readability to run the analysis.
- Review your Reading Level, Flesch Reading Ease score, and Flesch-Kincaid Grade Level.
- Check the word, sentence, syllable, and average counts to spot exactly what’s driving your score.
- Use Copy or Download to save your analyzed text for reference.
Example Usage
Input: “The quick fox jumps. It runs fast through the field.”
Output: Flesch Reading Ease: 100+ (Very Easy), Flesch-Kincaid Grade Level: below 3rd grade.
Input: A paragraph with long, multi-clause sentences and technical vocabulary.
Output: A lower Flesch Reading Ease score (30–50) and a higher grade level (12+), flagged as “Difficult” or “Fairly Difficult.”
Aim for a Flesch Reading Ease score of 60–70 for general web content — this range is easily understood by most readers without feeling oversimplified.
Frequently Asked Questions
A score between 60 and 70 is considered ideal for most web content, since it’s easily understood by 13- to 15-year-old students while still reading naturally for adults.
Flesch Reading Ease scores text from 0 to 100, with higher numbers meaning easier reading, while Flesch-Kincaid Grade Level translates that same difficulty into a U.S. school grade level, like 8.2 or 12.5.
You can analyze up to 500 words per test, and you’re limited to 6 tests per day.
Both matter, but long sentences with many clauses tend to lower your score faster than individual complex words, since average words per sentence carries significant weight in the Flesch formula.
Yes, it’s completely free with no signup required.
