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AI Punctuation Checker

Free

Fix commas, periods, semicolons, and apostrophes with AI-powered analysis

5 free checks/day Detailed explanations No signup required
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Get your punctuation right every time. The AI Punctuation Checker catches misplaced commas, missing periods, incorrect semicolon usage, apostrophe errors, and quotation mark issues. Each correction comes with a clear explanation of the punctuation rule so you learn as you fix. Whether you struggle with comma splices, semicolon vs. colon decisions, or the dreaded its/it's confusion, this tool gives you instant, accurate corrections. Perfect for polishing emails, essays, and professional documents where punctuation errors undermine your credibility.

Frequently Asked Questions

What punctuation marks does it check?
The tool checks all standard English punctuation: commas, periods, semicolons, colons, apostrophes, quotation marks, hyphens, dashes (em and en), parentheses, and exclamation/question marks. It catches common errors like comma splices, missing Oxford commas, apostrophe misuse in possessives, and incorrect semicolon placement.
Does it explain the punctuation rules behind each correction?
Yes. Every correction includes an explanation of which rule applies and why. For example, if you misuse a semicolon, it explains that semicolons connect two independent clauses and suggests the correct alternative. This helps you learn the rules, not just fix the text.
Can it handle different punctuation styles (AP, Chicago, Oxford)?
The checker follows standard English punctuation conventions that overlap across most style guides. For style-specific rules like the Oxford comma, it defaults to including it (Chicago style) but won't flag its absence as an error since both conventions are valid.
Does it catch apostrophe errors in possessives and contractions?
Yes. This is one of its strongest areas. It catches its/it's confusion, your/you're errors, missing possessive apostrophes (the teams plan vs. the team's plan), and incorrect plural apostrophes (apple's for sale vs. apples for sale). Each correction explains the specific rule.
Will it fix comma splices automatically?
Yes. The tool identifies comma splices (two independent clauses joined only by a comma) and suggests fixes: adding a conjunction, replacing the comma with a semicolon, or splitting into two sentences. It explains why each option works so you can choose the best one for your writing style.

Also Available For

Sentence Checker Students Vs Grammarly

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