Run-on Detector
Scan your writing for likely comma splices, conjunction overload, and run-on sentences.
What Counts as a Likely Run-on
The scan looks for three signals: a comma-splice pattern (a comma directly followed by a pronoun or 'there/this/that'), more than two coordinating conjunctions ('and', 'but', 'or', 'so') in a single sentence, or a sentence over 45 words. A sentence can be flagged for more than one reason at once. This is a rules-based scan, not a grammar parser — every result is a likely run-on worth a manual read, not a guaranteed error.
Reading Your Results
Each flagged sentence lists the specific reason (or reasons) it was picked up, so you know exactly what to check rather than having to guess.
Fixing a Run-on
Split the sentence into two at a natural break, replace a comma splice with a full stop or semicolon, or use a subordinating conjunction to make the relationship between the clauses clearer.