SnapToolsReadability Checker
Runs in your browserScore a piece of writing with the Flesch Reading Ease and Flesch-Kincaid Grade Level formulas — two of the most widely used readability metrics.
About this tool
Both formulas work from the same two signals — average sentence length and average syllables per word — on the theory that longer sentences built from longer words are harder to read. Flesch Reading Ease reports a 0-100 score (higher is easier); Flesch-Kincaid Grade Level converts the same inputs into a rough US school grade. Neither measures clarity, structure, or whether the content makes sense — only surface complexity.
How to use
- Paste the text you want to check.
- Run to see word/sentence counts and both readability scores.
- Aim for a target band appropriate to your audience — see the FAQ for rough guidelines.
When to use this tool
- Checking whether marketing copy reads as approachable as intended.
- Simplifying documentation or support content for a general audience.
- Comparing draft revisions to see if an edit actually simplified the writing.
Tips
- General audience web copy usually aims for a Reading Ease of 60+ (roughly 8th-9th grade level).
- Shortening sentences moves the score more than swapping in shorter words — start there.
Limitations
- Syllable counting is a vowel-group heuristic, the same approach every lightweight readability tool uses — expect small variance from tools using a dictionary.
FAQ
- What's a good score?
- For general audiences, 60-70 Reading Ease (roughly 8th-9th grade) is a common target. Technical or academic writing reasonably scores lower.
- How accurate is the syllable count?
- It uses a vowel-group heuristic, the same approach every lightweight readability tool uses — close, but not dictionary-perfect for every word.
- Is my text sent anywhere?
- No. Scoring runs entirely in your browser.