Readability Checker
Paste your text and instantly see how easy it is to read — with Flesch scores, grade level and plain-English feedback.
What is it?
Readability refers to how easy a piece of writing is to read and understand. It is influenced by sentence length, word length, vocabulary complexity, and the rhythm of the text. Readability formulas are mathematical models that estimate these factors and assign a score that correlates with the education level a reader needs to understand the text comfortably. Our free readability checker analyses your text against the most widely used readability metrics: the Flesch Reading Ease score (a 0–100 scale where higher is easier), the Flesch-Kincaid Grade Level (the US school grade needed to read the text), and average sentence and word length stats. The tool also gives you a plain-English summary of what the score means — for example, whether your text suits a general audience or requires a college-educated reader — so you can make practical decisions about revising your writing.
How to use it
- Paste or type your text into the input area. At least a few sentences work best for meaningful results.
- The readability scores update automatically as you type.
- Read the Flesch Reading Ease score: 60–70 is ideal for most web content; below 30 is very difficult.
- Check the Flesch-Kincaid Grade Level: the number corresponds roughly to the US school grade needed to read the text comfortably.
- Use the colour-coded feedback badge to quickly understand whether your text is easy, standard, difficult, or very difficult.
Why use this tool
Whether you are writing a blog post, a landing page, a product description, a government document, an academic paper, or a children's book, knowing the readability of your text helps you write for your actual audience. Content marketers and SEOs pay close attention to readability because Google's Helpful Content guidelines and user-experience signals both reward content that is clear, direct and easy to process. Pages with lower average reading difficulty tend to have better engagement metrics — lower bounce rates and longer time on page — which indirectly support rankings. Writers and editors use readability scores to catch sentences that have grown too complex, spot paragraphs that need breaking up, and ensure that copy stays accessible to the intended audience. Teachers use them to verify that materials match the expected reading level of their students. UX writers use them to keep interfaces and error messages plain and clear. Because our tool runs entirely in your browser, your text never leaves your device — you can safely paste confidential drafts, legal documents or private communications without any data being transmitted.
Frequently asked questions
What is a good Flesch Reading Ease score?
Scores between 60 and 70 are considered ideal for general audiences — equivalent to plain English understandable by the average adult. Most quality web content sits in this range. Academic papers often score below 30; children's books score above 80.
What does the Flesch-Kincaid Grade Level mean?
The grade level corresponds to the US school grade a reader needs to understand the text. A score of 8 means an 8th-grader can read it comfortably. For most online content, a grade level of 6–9 is ideal.
How can I improve my readability score?
Shorten your sentences, use simpler synonyms for complex words, break up long paragraphs, use active voice, and avoid excessive jargon. Each of these changes measurably reduces grade level and increases the Flesch ease score.
Does a higher readability score mean the content is less intelligent?
No. The best writers — journalists, bestselling authors, skilled communicators — consistently write at accessible reading levels. Clarity is a skill, not a sign of simplicity.
How much text do I need for an accurate score?
Readability formulas work best with at least 100 words. A single sentence will give you a number but it may not reflect the overall difficulty of a longer document.