Readability & Content Analyzer
Paste your text to instantly see its reading ease score, grade level, Gunning Fog index, estimated reading time, and a breakdown of words, sentences, and syllables. Long sentences are flagged so you can simplify them.
Your text is analysed locally — it is never sent to any server.
How to use this tool
- Paste or type your text into the input area.
- Scores update in real time as you type.
- Check the Flesch Reading Ease score — higher means easier to read (60–70 is good for general audiences).
- Review the Flesch-Kincaid grade level to see the US school grade your text targets.
- Use the Gunning Fog index to identify how many complex (3+ syllable) words drive difficulty.
- Review any flagged long sentences (30+ words) and consider splitting them for clarity.
Why use our Readability & Content Analyzer?
Web copy and blog posts perform best at around grade 8 (Flesch-Kincaid), while academic papers typically sit above grade 12. Plain-language guidelines for government and legal writing often target a Flesch Reading Ease of 60 or above. Checking readability before publishing lets you catch unnecessarily complex sentences, reduce bounce rate, and reach a wider audience — including non-native speakers. All analysis runs locally in your browser; your text is never sent to any server.
Frequently Asked Questions
What is the Flesch Reading Ease score?
The Flesch Reading Ease score (0–100) estimates how easy a piece of English text is to read. Higher scores mean easier reading: 90–100 is very easy (4th grade), 60–70 is standard (7th–8th grade), and below 30 is very difficult (professional/academic). The formula considers average sentence length and average syllables per word.
What is the Flesch-Kincaid Grade Level?
The Flesch-Kincaid Grade Level maps text difficulty to a US school grade. A score of 8 means the text is suitable for an 8th grader. Web content and journalism typically aim for grade 6–8. Higher grades indicate more complex prose.
What is the Gunning Fog Index?
The Gunning Fog Index is a readability formula that estimates the years of education needed to understand the text on a first reading. It focuses on sentence length and the proportion of complex words (3+ syllables). A score of 12 equals a high-school senior; most business writing targets 10–12.
Why are long sentences flagged?
Sentences with more than 30 words are harder to parse, especially for non-native readers and on mobile screens. This tool highlights them so you can consider splitting them into two shorter sentences without losing meaning.
Is this tool accurate for non-English text?
The formulas (Flesch, FK, Gunning Fog) are designed for English and use English syllable-counting rules. Results for other languages will be approximate at best and should not be relied upon.
What is a "complex word" in the Gunning Fog formula?
A complex word is any word with three or more syllables. In the original Gunning Fog method, common suffixes like -ed and -es that add syllables to simple words are excluded, but for a quick estimate this tool counts all 3+ syllable words.
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