Readability Checker
Measure text readability with common scores like Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, and SMOG.
ReadabilityFleschClient-sideFree to use
Scores
Words
0
Sentences
0
Syllables
0
Complex words
0
Flesch Reading Ease
N/A
Flesch-Kincaid Grade
N/A
Gunning Fog
N/A
SMOG
N/A
Coleman-Liau
N/A
ARI
N/A
How to use
- Paste your text. Articles, emails, sales copy, or documentation.
- Read the scores. See grade-level and readability metrics instantly.
- Revise and compare. Adjust your draft and re-check until the scores improve.
Common use cases
- Checking marketing copy for clarity
- Auditing docs for audience fit
- Improving blog posts and product education content
Frequently asked questions
- Which readability formulas does the tool calculate?
- The tool calculates Flesch Reading Ease, Flesch-Kincaid Grade Level, Automated Readability Index (ARI), and Coleman-Liau Index. Each formula weights sentence length, word length, and syllable count differently, so they sometimes produce slightly different grade-level estimates for the same text.
- How should I interpret the grade level score?
- A grade level of 8 means the text is readable by an average 8th-grader, roughly 13 to 14 years old. Most general-audience web content targets a grade level between 6 and 9. Technical documentation or legal writing often scores above 12, while consumer-facing marketing copy typically aims for 7 or below.
- Do the scores measure whether my writing is good?
- No. The formulas measure structural proxies such as sentence length and syllable count; they have no understanding of meaning, clarity, or logic. A sentence full of short nonsense words will score very easy even though it communicates nothing.
- Does my text get sent to a server?
- No. All calculations run locally in your browser. Your content is never uploaded or transmitted anywhere.
- Why are the scores unreliable for very short texts?
- Readability formulas are calibrated against full documents. When a text has fewer than three or four sentences, a single unusually long sentence can swing the grade level by several points in either direction. For best results, paste at least a full paragraph.
Related tools
How to use
- Paste your text. Articles, emails, sales copy, or documentation.
- Read the scores. See grade-level and readability metrics instantly.
- Revise and compare. Adjust your draft and re-check until the scores improve.
Common use cases
- Checking marketing copy for clarity
- Auditing docs for audience fit
- Improving blog posts and product education content
Frequently asked questions
- Which readability formulas does the tool calculate?
- The tool calculates Flesch Reading Ease, Flesch-Kincaid Grade Level, Automated Readability Index (ARI), and Coleman-Liau Index. Each formula weights sentence length, word length, and syllable count differently, so they sometimes produce slightly different grade-level estimates for the same text.
- How should I interpret the grade level score?
- A grade level of 8 means the text is readable by an average 8th-grader, roughly 13 to 14 years old. Most general-audience web content targets a grade level between 6 and 9. Technical documentation or legal writing often scores above 12, while consumer-facing marketing copy typically aims for 7 or below.
- Do the scores measure whether my writing is good?
- No. The formulas measure structural proxies such as sentence length and syllable count; they have no understanding of meaning, clarity, or logic. A sentence full of short nonsense words will score very easy even though it communicates nothing.
- Does my text get sent to a server?
- No. All calculations run locally in your browser. Your content is never uploaded or transmitted anywhere.
- Why are the scores unreliable for very short texts?
- Readability formulas are calibrated against full documents. When a text has fewer than three or four sentences, a single unusually long sentence can swing the grade level by several points in either direction. For best results, paste at least a full paragraph.