Readability Checker
Good writing isn’t just about grammar, it’s about how easy your words are to actually read. Our free readability checker analyzes any piece of text and instantly tells you how easy or difficult it is to understand, using the widely trusted Flesch-Kincaid readability formulas. Just paste your text and get a clear score in seconds, no sign-up required.
Whether you’re writing a blog post, a school essay, marketing copy, or technical documentation, knowing your readability score helps you match your writing to your audience.
What This Tool Offers
- Flesch Reading Ease Score: a number from 0 to 100 showing how easy your text is to read, higher means easier
- Reading Level Label: a plain-language rating from “Very Easy” to “Very Difficult”
- Flesch-Kincaid Grade Level: an estimate of the US school grade level needed to understand the text
- Word, Sentence, and Syllable Counts: a full breakdown of your text’s structure
- Instant Results: no waiting, no sign-up, results appear the moment you click Check
Who Uses a Readability Checker?
Bloggers and content writers use readability scores to keep articles accessible and engaging, since most online readers prefer content that’s easy to skim and understand quickly.
Students use it to check whether an essay or assignment matches the expected reading level for their grade or course.
Marketers and copywriters rely on readability checks to make sure ad copy, emails, and landing pages are easy to understand at a glance, since complicated language often hurts conversion rates.
Technical writers use it to balance necessary detail with clarity, especially for documentation meant for a general audience rather than experts.
Editors and proofreaders use readability scores as one more data point when reviewing a piece, alongside grammar and style checks.
How the Flesch-Kincaid Formula Works
Readability formulas estimate difficulty based on two key factors: sentence length and word complexity (measured by syllable count). Longer sentences and longer, multi-syllable words push a text toward a harder reading level, while short sentences and simple words make text easier to read quickly.
The Flesch Reading Ease score ranges from 0 to 100:
- 90 to 100: Very Easy (understandable by an average 11-year-old)
- 60 to 70: Standard (easily understood by most adults)
- 30 to 50: Difficult (best suited to college-level readers)
- 0 to 30: Very Difficult (best understood by university graduates)
The Flesch-Kincaid Grade Level translates the same analysis into a US school grade level, for example, a score of 8 suggests the text is suitable for an eighth-grade reading level.
How to Use the Readability Checker
- Paste your text into the box, anything from a paragraph to a full article works.
- Click “Check Readability” to run the analysis.
- Review your score in the highlighted box at the top, along with its plain-language label.
- Check the detailed stats below, word count, sentence count, syllable count, and grade level.
- Edit and re-check as needed to simplify or adjust your writing until it matches your target audience.
Frequently Asked Questions
Is this readability checker free to use?
Yes, completely free, with no sign-up and no limit on how many times you can check text.
What’s a “good” readability score?
It depends on your audience. For general web content, a Flesch Reading Ease score of 60 or higher (Standard or easier) is usually a good target, since it matches how most people read online.
Does a low score mean my writing is bad?
Not necessarily. Some technical or academic writing is expected to score lower due to necessary complexity. The score is a guide, not a judgment of quality.
Does this tool store or share my text?
No. The analysis happens entirely in your browser using JavaScript, your text is never sent to or stored on our servers.
Can I check text in other languages?
The Flesch-Kincaid formula is designed for English text. Results for other languages may not be accurate.
Is there a text length limit?
No strict limit, but very long documents may take a moment longer to process since counting happens in your browser.
Try It Now
Scroll up, paste your text, and click “Check Readability” to see your score instantly.