Free Punctuation Checker

Reviewers and examiners rarely comment on punctuation, and that is exactly why it matters: they notice it silently. A comma splice in an abstract, an it's where its belongs, a compound modifier missing its hyphen, none of these will sink a paper on their own, but together they read as haste, and haste is the last impression a manuscript can afford. Punctuation errors are also the hardest class to self-catch, because you read your own sentences with the rhythm you intended rather than the rhythm the marks actually produce.

A punctuation check is therefore best done as its own pass, with a tool whose scope is deliberately narrow. The checker on this page corrects marks and only marks: it will repair the comma splice with a semicolon, restore the possessive apostrophe, and hyphenate the compound modifier, but it will not reword a sentence, ever. That constraint is what makes the pass fast to review. When every change is a mark, you can audit the whole list in under a minute and accept it without re-reading for meaning.

Two neighbouring tools cover what this one deliberately does not. The comma checker specializes in the one mark that carries most of the ambiguity, including an explicit Oxford comma mode for matching your style guide. The em dash remover deals with the punctuation signature of AI-assisted drafting, free and unlimited. And when the underlying sentence, not its punctuation, is the problem, the grammar checker is the wider net.

For complete documents, the ProofreaderPro editor proofreads punctuation alongside grammar and register across the whole manuscript, with tracked changes you approve individually, which is the same show-your-work principle this checker runs on.