ENGLISH EXAMS & WRITING · LOCAL WORKBENCH

Comma Splice Checker

Find likely comma splices, see the confidence behind each cue, and compare repair options.

ENGLISH EXAMS & WRITING · LOCAL WORKBENCH · BROWSER WORKSPACE

Find the break. Choose how to repair it.

Find likely comma splices, see the confidence behind each cue, and compare repair options.

01 · YOUR WRITING59 words · 6 sentences
DETECTION RULES · SWITCH EACH ON OR OFF
One comma, two complete thoughts?

A comma splice is likely when both sides could stand alone. Try a full stop, semicolon, or a conjunction that explains the relationship.

02 · CLAUSE CHECK5 flags
LIKELY SPLICES2
WORTH CHECKING3
SENTENCES6

Text to inspect

Highlights show the clause after each comma

The experiment failed, we repeated it the following week. Results were inconsistent, however the team published anyway. Public transport in the city is excellent, it is also cheap. The report was finished on time, and the client was satisfied. Rainfall increased sharply after 1990, therefore the model was revised. She studied for months, she still found the exam difficult.

WORTH CHECKING · SENTENCE 1Medium confidence

“we repeated” after a comma often begins an independent clause. Check whether both halves could stand alone.

Choose a repair
Full stopThe experiment failed. We repeated it the following week.
SemicolonThe experiment failed; we repeated it the following week.
Add a coordinating conjunctionThe experiment failed, and we repeated it the following week.
Subordinate the first clauseBecause the experiment failed, we repeated it the following week.
LIKELY COMMA SPLICE · SENTENCE 2High confidence

however is a conjunctive adverb, not a coordinating conjunction. Check the clause boundary.

Choose a repair
Semicolon before, comma afterResults were inconsistent; however, the team published anyway.
Full stop, start a new sentenceResults were inconsistent. However, the team published anyway.
WORTH CHECKING · SENTENCE 3Medium confidence

“it is” after a comma often begins an independent clause. Check whether both halves could stand alone.

Choose a repair
Full stopPublic transport in the city is excellent. It is also cheap.
SemicolonPublic transport in the city is excellent; it is also cheap.
Add a coordinating conjunctionPublic transport in the city is excellent, and it is also cheap.
Subordinate the first clauseBecause public transport in the city is excellent, it is also cheap.
LIKELY COMMA SPLICE · SENTENCE 5High confidence

therefore is a conjunctive adverb, not a coordinating conjunction. Check the clause boundary.

Choose a repair
Semicolon before, comma afterRainfall increased sharply after 1990; therefore, the model was revised.
Full stop, start a new sentenceRainfall increased sharply after 1990. Therefore, the model was revised.
WORTH CHECKING · SENTENCE 6Medium confidence

“she still found” after a comma often begins an independent clause. Check whether both halves could stand alone.

Choose a repair
Full stopShe studied for months. She still found the exam difficult.
SemicolonShe studied for months; she still found the exam difficult.
Add a coordinating conjunctionShe studied for months, and she still found the exam difficult.
Subordinate the first clauseBecause she studied for months, she still found the exam difficult.

Heuristic, not a grammar parser. Results are prompts to check the sentence; some correct constructions can be flagged, and noun phrase clauses can be missed.

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Runs in this browser. Results are estimates or editing cues. Review the assumptions and source-specific limits before using them in a consequential decision.

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How this app works

Find likely comma splices, see the confidence behind each cue, and compare repair options. Review assumptions, source notes, and any context-sensitive flags before relying on the result.