Free Punctuation Checker

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Improve Your Punctuation

You can’t write without punctuation. Or you could, but all you’d end up with is a word salad. Punctuation marks aren’t just stylistic; they help the reader make sense of your sentences. They show when to take a pause between ideas or reveal relationships between the words themselves. English has a lot of punctuation rules—and exceptions. Understanding them helps you avoid mistakes like using "it’s" when you meant "its," or misplacing a period within a parenthesis. Read these helpful resources to understand the conventions for commas, colons, and more, and see your writing improve.
Illustration of man with comma shirt

A quick guide to many, many ways you can use a comma.
Illustration of period use

Check out all the roles a period can play in your writing—some may surprise you!
Illustration of semicolon

Semicolons feel fancy, but they’re also subtle. Learn how to use them to their full potential with this guide.
Illustration of an apostrophe

Where, oh where does the apostrophe go? Check out all the nuances of this tricky punctuation mark.
Illustration of a hyphen

A handy guide full of rules and examples so you can use the hyphen with confidence.
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More Punctuation Rules

Read all about the most common and rare punctuation marks, from question marks to em dashes and parentheses to interrobangs.

How Grammarly Can Help

Grammarlys full range of writing feedback is designed to help you make your writing the best it can be. With real-time suggestions on everything from spelling, grammar, and punctuation to tone and clarity, you can be confident that your writing presents your ideas in their best light.

Punctuation and spelling fixes

Be confident that your punctuation and spelling are spot-on every time.
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Full sentence rewrites examples

Full-Sentence Rewrites

See clearer and more polished ways to say what you mean.

Tone Detection

Find out how your message is likely to sound to a reader.
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Fluency Suggestions

Get writing feedback tailored to your language background.

Works Where You Write

Microsoft Word
Microsoft Outlook
Google Docs

Frequently Asked Questions

How does Grammarly’s punctuation checker work?

Grammarly’s algorithms analyze your writing in real time to detect and fix missing and misused punctuation marks.

Where can I use Grammarly’s punctuation checker?

Grammarly's punctuation checker works in your browser and across all of your favorite desktop apps. You can even use it on your phone.

How is Grammarly’s punctuation checker different from my built-in word processor’s?

Standard punctuation checkers can detect basic problems like missing periods, but they often fall short when it comes to more complicated punctuation. Grammarly helps with punctuating dates, avoiding comma splices, correctly using semicolons, and more.

What are the 14 punctuation marks, and how are they used?

The fourteen punctuation marks most commonly used in English are periods, question marks, exclamation points, commas, colons, semicolons, dashes, hyphens, brackets, braces, parentheses, apostrophes, quotation marks, and ellipses. Read about how they can each be used in this handy guide.

What are some of the most common punctuation mistakes people make?

Because there are so many different ways to use a comma, and so many rules to remember, comma mistakes are among the most common types of punctuation errors. Read our guide to comma rules to learn the ins and outs of this punctuation mark.

What other writing feedback does Grammarly offer?

Grammarly offers a full range of writing feedback, with real-time suggestions on clarity, vocabulary, tone, and more. Check your English text for grammar, spelling, and punctuation errors with Grammarly’s free grammar checker.

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