Readability Checker — Free Readability Score Tool
Paste your text and see how readable it is with Flesch-Kincaid scoring. Instantly. No sign-up required.
How to readability checker
- 1Paste or type your text into the text area above
- 2View real-time readability scores as you type
- 3Check the Flesch Reading Ease score and visual gauge (green = easy, red = difficult)
- 4Review the Flesch-Kincaid Grade Level and other metrics to improve your writing
About This Tool
A readability checker measures how easy your writing is to understand. Whether you are crafting blog posts, marketing copy, academic papers, or technical documentation, knowing your readability score helps you tailor your language to your target audience. Text that scores well on readability is more likely to be read completely, shared, and acted upon.
This free readability checker calculates two industry-standard metrics: the Flesch Reading Ease score (0-100, where higher is easier) and the Flesch-Kincaid Grade Level (the US school grade needed to understand the text). It also displays average sentence length, average syllables per word, and total word, sentence, and syllable counts. A color-coded visual gauge gives you an instant snapshot: green for easy reading, yellow for moderate, and red for difficult.
All analysis happens in real time as you type, directly in your browser. Your text is never sent to a server, making this readability checker safe for confidential documents and draft content. Syllable counting uses a vowel-group heuristic that is accurate for the vast majority of English words. There are no usage limits and no account required.
Frequently Asked Questions
For general web content and blog posts, aim for 60-70 (Standard to Fairly Easy). Marketing copy and consumer-facing content should target 70-80. Academic or technical writing naturally scores lower at 30-50.
It estimates the US school grade level needed to understand your text. A score of 8.0 means an 8th grader could understand it. Most popular online content is written at a 6th to 8th grade level.
The tool counts groups of consecutive vowels (a, e, i, o, u, y) in each word, with adjustments for common patterns like silent e. This heuristic is accurate for most English words.
The Flesch-Kincaid formulas were designed for English text. While the tool will process text in other languages, the readability scores may not be meaningful because syllable counting and formula constants are calibrated for English.
Use shorter sentences, choose simpler words with fewer syllables, break long paragraphs into smaller ones, and use active voice instead of passive voice. Aim for an average sentence length of 15-20 words.