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Readability Checker
Paste your text to get an instant Flesch Reading Ease score and Flesch–Kincaid grade level. See how easy your content is to read and where to simplify it.
Flesch Reading Ease & Flesch–Kincaid Grade Level
The Flesch Reading Ease score runs from 0 to 100 — higher means easier to read. Most web content should aim for 60 or above, roughly the reading level of a 13 to 15 year old. The Flesch–Kincaid grade level converts the same maths into a US school grade. Both are driven by sentence length and syllables per word, so shorter sentences and simpler words lift your score. Everything is calculated in your browser.
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What is the Readability Checker?
The readability checker scores how easy your writing is to read using the well-known Flesch Reading Ease formula and the Flesch-Kincaid grade level. Paste your text and instantly see your score, the reading level it maps to, your average sentence length, and word count. Clearer content keeps readers on the page and is easier for everyone to understand, which supports both engagement and SEO.
Example: simplifying a financial services page
Your mortgage-advice page scores a Flesch Reading Ease of 28 — “very difficult”, close to academic-paper territory. After breaking up long sentences, replacing jargon (“amortisation” → “repayment schedule”), and adding subheadings, the score rises to 61 — “standard”, readable by most adults.
Very difficult — academic level
Standard — accessible to most readers
Down from 32 words
Key Features
Flesch Reading Ease Score
Get a score from 0 to 100 where higher means easier to read, with a plain-English label for the reading level it represents.
Flesch-Kincaid Grade Level
See the US school grade level needed to understand your text, a widely used measure of reading difficulty.
Sentence And Word Stats
View average words per sentence and total word count, the two levers that most affect how readable your writing is.
Instant And Private
Scores update as you type and all calculation happens in your browser, so your text never leaves your device.
How to Use This Tool
Paste your text
Drop your article, blog post, email, or web copy into the box. A few sentences or several paragraphs both work.
Check your scores
Read your Flesch Reading Ease score, grade level, and sentence length to see how easy your writing is to follow.
Simplify and re-check
Shorten long sentences and swap complex words for simpler ones, then watch your score improve in real time.
Why This Matters for SEO
Most people skim online and leave quickly if content feels heavy going. Writing at a reading level your audience is comfortable with keeps them engaged, improves comprehension, and makes your content more accessible. For a general web audience a Flesch Reading Ease score of around 60 to 70 is a good target. Clear, readable content tends to hold attention longer, which supports lower bounce rates and better search performance.
Frequently Asked Questions
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