Find missing commas, misplaced apostrophes, capitalization errors and spacing problems. Paste your text and press Check.
How to check punctuation
- Paste your text into the editor above.
- Press Check text, then tap the Punctuation filter to see only punctuation issues.
- Accept the suggestions you agree with and copy your corrected text.
Punctuation errors this tool finds
| Problem | Example | Correction |
|---|---|---|
| Missing comma after an introductory phrase | After dinner we went out. | After dinner, we went out. |
| Comma splice | I was tired, I went to bed. | I was tired, so I went to bed. |
| Wrong apostrophe | The dog wagged it’s tail. | The dog wagged its tail. |
| Missing apostrophe | I dont know. | I don’t know. |
| Lowercase sentence start | we left early. | We left early. |
| Double spaces and spacing before punctuation | Wait , what ? | Wait, what? |
Why punctuation matters
Punctuation changes meaning. “Let’s eat, Grandma” and “Let’s eat Grandma” use the same words but say very different things. Clean punctuation also makes text easier to scan, which matters for emails, essays and anything you publish online.
Because punctuation rules depend on context, every suggestion explains the rule behind it, so you can decide whether it fits your sentence.
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Frequently asked questions
Does it check comma usage?
Yes. It flags common comma problems, including missing commas after introductory words and comma splices.
Can it fix apostrophes in its and it’s?
Yes. It catches its and it’s mix-ups, along with missing apostrophes in contractions like don’t and can’t. See our its vs it’s guide for the rule.
Is the punctuation checker free?
Yes, it is free with no account required.