Free readability score tool
Readability Checker
Paste text to check readability score, grade level, long sentences, average sentence length, and writing complexity.
- Free
- No Signup
- Private Browser-Based Tool
- Works on Mobile
Private browser-based tool
Readability Checker
Paste text to check readability score, grade level, long sentences, average sentence length, and writing complexity.
What is a readability checker?
A readability checker estimates how easy text is to read. It uses signals such as sentence length, word count, syllables, and complex words to show scores like Flesch Reading Ease, Flesch-Kincaid Grade, and Gunning Fog.
Who is this tool best for?
Best for blog writers, teachers, students, UX writers, editors, SEO writers, and business teams that need clearer writing.
- Check Flesch Reading Ease
- Review grade level
- Find long sentences
- Simplify web copy
- Compare readability before and after editing
- Improve public-facing content
Simple workflow
How to Use Readability Checker
Paste or type text
Add your draft, article, essay, caption, email, script, or document to the text box.
Review instant results
Check the live stats, warnings, table, or formatted output without refreshing the page.
Edit for clarity
Use the signals to shorten, format, clean, or improve the text for real readers.
Copy or download
Copy the final text or download a TXT file when you are ready.
Quick reference
Readability Score Guide
Use these ranges as practical editing guides. Exact requirements can vary by school, publisher, platform, or client.
| Use | Guide |
|---|---|
| 80-100 | Very easy to read |
| 60-79 | Clear for most readers |
| 40-59 | Moderately difficult |
| 0-39 | Difficult and may need editing |
Works for English Writing Worldwide
SentencesCounter is built for English writing used in the United States, United Kingdom, Canada, Australia, New Zealand, Ireland, South Africa, and international English-language teams that publish in English.
Privacy-First Browser Processing
The tool runs in your browser. It does not require signup and does not upload your pasted draft by the counter. This is useful for essays, emails, business documents, scripts, and unpublished website copy.
Helpful answers
Frequently Asked Questions
What readability scores does this tool show?
It shows Flesch Reading Ease, Flesch-Kincaid Grade Level, and Gunning Fog Index.
What is a good Flesch score?
A score around 60 or higher is often clearer for general audiences.
Does readability affect SEO?
Clear, helpful content can improve user experience. Use readability as one editing signal, not a ranking shortcut.
Can this check academic writing?
Yes. It can check academic drafts, but academic writing may naturally score harder than general web copy.
Does it upload text?
No. The analysis runs in your browser.
Can I use it for U.S. and U.K. English?
Yes. It works with English text across regions.
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