Grammar check for free! Paste your text in the grammar checker and hit the button to fix all grammar, spelling, and punctuation errors using cutting-edge AI technology.

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Free Grammar Checker

Use QuillBot's free online grammar checker tool to perfect your writing by reviewing your text for grammar, spelling, and punctuation errors.

Whenever you need to review your writing or grammar check sentences, QuillBot is here to help make the editing process painless. QuillBot’s free online sentence corrector helps you avoid mistakes and polish your writing, letting your ideas shine instead of your typos.

Get perfect grammar on the go

Polish your grammar across the web with our apps and extensions.

Extension App

Also available on:

Play Store App
App Store App

For additional details, read more.

One Grammar Checker to rule them all

🪄  AI-poweredInstantly corrects grammatical errors
✅  ChecksGrammar, spelling & punctuation
📣  English dialectsUS, UK, CA & AU
✍️️  Other languagesGerman, French, Spanish, Portuguese (Brazilian), German (Swiss) & Dutch
💰  100% freeUnlimited grammar checks

Simplify your writing workflow

Sick of having so many tabs open to access different writing and research tools? We get it. Cut down on common writing roadblocks by minimizing the distractions that come with a sea of open tabs. QuillBot has cutting-edge AI-based writing tools for paraphrasing, summarizing, grammar checking, and more. Create a smooth, simple workflow on our sleek, user-friendly interfaces. Save yourself time, energy, and frustration with our arsenal of helpful products.


Correct grammar

Should you use “effect” or “affect”? What’s the difference between “their,” “there,” and “they’re”? There’s so much to remember when it comes to proper grammar, no matter what language you speak. Luckily, QuillBot has your back with the best online grammar checker out there—and it’s free!

Correct spelling

QuillBot corrects both misspelled and misused words, so you’ll never have to worry about pesky spelling rules or the differences between homophones again. With our free online spell check, spelling errors are a thing of the past. Your writing will be polished and professional from here on out.


Correct punctuation

What’s a comma splice? When should you use a semicolon? Does a comma belong there? Even spelling and grammar sticklers can have a tough time following punctuation rules, so it’s a good thing QuillBot’s Grammar Checker doubles as a punctuation checker. By using our tool, you can save your brainpower for articulating your ideas since you’ll have correct punctuation all figured out.

Correct tons of grammatical errors with just one click

We care that your workflow is streamlined, which is why we rolled three tools into one with our cutting-edge Grammar Checker. It provides a reliable sentence check for grammar, spelling, and punctuation. QuillBot will grammar check sentences from the beginning to the end of any project you’re working on with one simple click, making sure that your work is eloquent and error-free.


Turn a grammar check into a learning experience

Every writer’s background is different. Some of us took great writing courses, while others learned through trial and error. When Grammar Checker flags mistakes in your writing, it visually brings these issues to your attention, helping you learn and grow into a better, more compelling writer.

“That’s how you spell ‘receipt’? I’ve been spelling it wrong forever!”

“I guess I do need a conjunction between these two phrases separated by a comma. They are both complete thoughts—I understand comma splices now!”

QuillBot has what you need

QuillBot offers you top-notch tools for perfecting your writing, from our Paraphraser and Summarizer to our Plagiarism Checker. We even help with any English variant you’re writing in, whether it’s UK, US, Australian, or Canadian.

But the fun doesn’t stop with English. Now you can use Grammar Checker to guarantee your text is error-free in German, French, Spanish, Brazilian Portuguese, Swiss German and Dutch. After all, perfect prose is a global goal.

At QuillBot, we’re committed to making writing painless by building the most robust writing and research platform in the world. Backed by AI technology, our models are more dynamic than those of any other tools on the market, and we’re always looking to improve our users’ experience and workflow.

What other tools would be helpful to you? We want to hear from you.

Below are some other examples of grammar, spelling, and punctuation errors that QuillBot’s Grammar Checker will identify and help you understand how to fix.

QuillBot Grammar Checker FAQs

Below are some of the most frequently asked questions with regard to Grammar Checker.

Why is QuillBot’s Grammar Checker better than other editing tools?

There are so many reasons, but we’ll try to keep this short:

  1. It thoroughly combs your writing for both simple and complex errors but suggests only necessary changes.
  2. It considers your meaning, not just the words and punctuation you use.
  3. It’s user friendly and lets you run the show.
  4. It tells you why each change is needed so you can learn.
  5. It’s available both online and as an extension for Chrome, Edge, and Word.
  6. It offers all these advantages without demanding that you sign up or pay.
How does QuillBot's Grammar Checker tool work?
  1. Either copy and paste your text into the text box or begin typing.
  2. Click on each underlined error to view the replacement options.
  3. Replace each error one at a time, or hit the “Fix All Errors” button.

Our Grammar Checker explains its suggestions and gives you a choice about which corrections to accept, so you’re always in control.

Who can use QuillBot's Grammar Checker?

Anyone can use QuillBot's Grammar Checker (and we hope you do). It’s particularly great for students who need to double check their work before handing it in, for professionals who are sending formal correspondence, for those who are learning English to get acquainted with English grammar rules, and for those who speak a myriad of other languages, like French, German, Spanish, Portuguese, Swiss German and Dutch.

  • Students can check their work before submitting it.
  • Professionals can ensure their business documents are error-free.
  • Language learners can understand German, French, Spanish, Brazilian Portuguese, Swiss German and Dutch grammar rules.
Can this tool be used as a spell checker?
Absolutely! Our Grammar Checker doubles as a spell check tool to ensure that every part of every sentence you write is correct. It can be hard to keep track of all the moving parts of a writing project, but now you can cross correct spelling off that list━we’ve got it covered.
Can this tool be used as a punctuation checker?
Our Grammar Checker sure can be used as a punctuation check. Using the correct punctuation is of the utmost importance when trying to communicate effectively, so we know how necessary it is that our tool functions as a grammar and punctuation check.
Is QuillBot's Grammar Checker tool free?
Yes! Our Grammar Checker is completely free to use. There is no sign up or payment required.