TextCheck

Sentence checker

Each sentence gets its own verdict, reading grade and list of problems. Ask the AI to explain and fix any sentence you’re unsure about.

Each sentence gets its own verdict here.

What makes a sentence correct?

  • A subject and a verb that agree (“the results were”, not “the results was”).
  • A complete thought: “Because it rained.” is a fragment.
  • Correct joins: two complete sentences need a full stop, semicolon or conjunction, not just a comma.
  • Words that fit: their/there/they’re, its/it’s, then/than.
  • A capital at the start and end punctuation.

Checking a sentence is grammatically correct

Paste a single sentence to check it on its own, or a whole paragraph to see every sentence in a list. Green means no problems were found; amber means it could be clearer; red means there is at least one grammar or spelling error. The AI explanation is useful when you want to understand the rule, not just fix it.

Questions people ask

Is the sentence checker free?

Yes. The checks are unlimited and run in your browser. The AI explanations have a fair-use hourly limit.

Can it tell if a sentence is a fragment?

Not reliably by rules alone. Use “Explain & fix with AI” for a sentence you think might be incomplete.

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