Sentence count
Counts sentences by splitting on terminal punctuation: periods, exclamation marks, and question marks. Helpful for measuring text complexity and readability.
Text input
COUNT
Runs entirely in your browser
How it works
The counting runs entirely in JavaScript in your browser tab. As you type or paste text, the counts update synchronously with no network request.
Processing runs in your browser
Your text is held only in browser memory. Closing the tab removes it entirely.
Related operations
For checking reading difficulty alongside word count, try the readability checker. To generate placeholder copy of a target length, use lorem ipsum. For tidying capitalisation as you draft, see the case converter.
Frequently asked questions
- How are sentences detected?
- The tool splits on '.', '!', and '?' characters and counts non-empty segments. It handles most prose well, though abbreviations (e.g. 'Dr.', 'U.S.') may cause slight overcounting.
- Does it handle multiple punctuation marks?
- Yes. Sequences like '!!!' or '...' are treated as a single sentence boundary, not three.
- Why is sentence count useful?
- Sentence count feeds into readability metrics like Flesch-Kincaid, helps editors flag overly long passages, and is useful in academic writing where average sentence length matters.
- Is my text sent to a server?
- All counting runs locally in your browser using JavaScript. Our servers are not involved at any point.
Related tools
Readability checker
Flesch reading ease, grade level, and estimated reading time. Paste any text and see the score.
Case converter
Convert text between camelCase, snake_case, kebab-case, PascalCase and more.
Text diff
Inline or side-by-side comparison. Handles plain text and structured diffs.
Sort lines
Sort lines alphabetically, by length, or shuffle randomly. Remove duplicates and empty lines in one click.