Sentence Structure Analyzer
Paste text to review sentence length and an approximate simple, compound, complex, or compound-complex label.
The tool estimates sentence types from sentence boundaries, commas, coordinating conjunctions, and common subordinators. It does not parse syntax, identify subjects or verbs, or certify grammatical correctness.
A QUICK WALKTHROUGH
How to use this tool
- Paste up to 20,000 characters.
- Analyze the text locally in your browser.
- Review the heuristic labels and clause cues.
Heuristic structure only
The tool estimates sentence types from sentence boundaries, commas, coordinating conjunctions, and common subordinators. It does not parse syntax, identify subjects or verbs, or certify grammatical correctness.
Length and limits
Input is limited to 20,000 characters. Words are word-like segments from Intl.Segmenter when available, with a whitespace fallback. Text stays in this browser.
GOOD TO KNOW
Common questions
Is this a grammar checker?
No. It reports deterministic cues and approximate sentence labels; it does not judge correctness.
How is complexity estimated?
A sentence starts with one clause. Coordinators, subordinators, and semicolon boundaries add clause cues. The resulting label is a heuristic.