Readability Checker
Score your writing with Flesch Reading Ease, Flesch-Kincaid Grade and Gunning Fog — explained in plain English.
Runs in your browser. Nothing is uploaded.Complex words found
Readability Checker in 3 steps
Paste your text
Add an article, essay, email or any writing you want to check.
Click Analyze
Three industry-standard readability formulas run instantly on your text.
Read the plain-English explanation
Each score comes with a colored gauge and a sentence explaining what it means for your reader.
Why use this Readability Checker
Questions about this tool
What is a "good" Flesch Reading Ease score?
Scores range roughly 0–100, with higher meaning easier to read. 60-70 is considered plain English suitable for most audiences (roughly 8th-9th grade level); 90+ is very easy, and below 30 is best suited to graduates and specialists.
What does the Flesch-Kincaid Grade Level mean?
It estimates the U.S. school grade level needed to understand the text on first reading — a score of 8 means an eighth-grader should be able to follow it, for example.
Why does passive voice matter?
Passive voice ("the ball was thrown by him" instead of "he threw the ball") often makes writing feel more distant and harder to follow — a few instances are fine, but many in a row usually signal an opportunity to tighten the writing.
How is a "complex word" defined here?
This tool flags words with three or more syllables (excluding common suffixes), following the standard definition used in the Gunning Fog formula — these words tend to slow readers down the most.