Comma splice
A comma splice is the error of joining two independent clauses with a comma instead of a period, a semicolon or a conjunction.
What is comma splice?
A comma splice happens when a writer joins two complete sentences with a comma alone, without a coordinating conjunction like "and" or "but." The clauses on either side could each stand as a sentence, which is why the single comma between them feels too light. The fix is usually to swap the comma for a period, a semicolon or a comma plus a conjunction.
Spliced: The feature shipped Tuesday, the team celebrated Friday.
Fixed with period: The feature shipped Tuesday. The team celebrated Friday.
Fixed with conjunction: The feature shipped Tuesday, and the team celebrated Friday.
Why does comma splice matter?
The comma splice is one of the most common errors in professional writing, and most readers sense it as an off rhythm even if they cannot name the mistake. Copy riddled with splices feels rushed and undercooked, which is a quiet problem for brand trust. Consistent, clean sentence boundaries signal that the team sweats the details.
How do you use comma splice?
Watch for commas sitting between two clauses that could each end with a period, since that is the signature of a splice.
Fix a splice with a period or a coordinating conjunction such as "and," "but" or "so," depending on the rhythm you want.
Treat a comma splice as a style choice only when the voice calls for a breathless, literary effect, and avoid it in product or marketing copy where clarity wins.
