Free grammar checker

Use QuillBot's free Grammar Checker tool to find and correct grammar, spelling, and punctuation errors.

Writing can be difficult, but enhancing your work with our grammar and sentence corrector is easy! Whenever you need to review your writing or grammar check sentences, QuillBot is here to help make the editing process both free and headache-free. Our online sentence checker helps you avoid mistakes and polish your writing so that your ideas shine instead of your typos.

One Grammar Checker to Rule Them All

⌛  AI-poweredInstantly corrects grammatical errors
✅  ChecksGrammar, spelling & punctuation
📣  English dialectsUS, UK, CA & AU
💰  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. QuillBot offers you a smooth, simple workflow with AI-based writing tools for paraphrasing, summarizing, and grammar checking. Our user-friendly interfaces and helpful products make writing easier, and you don’t even have to go through the extra step of creating an account (like you do with other writing tools).


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 English grammar. Luckily, QuillBot has your back with the best online grammar checker out there! Get a free spelling and grammar check anytime and stop worrying about grammar errors.

Correct spelling

Spelling might seem simple, but the English language has so many unique rules that can be hard to remember. Even spelling correction tools don’t always catch them all. A lot of these less sophisticated, free spell check tools often miss glaring mistakes, but never fear: QuillBot corrects both misspelled and misused words, so you’ll never have to worry about those pesky rules again. With our free online spell check, you can make spelling errors a thing of the past.


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 writing courses, while others learned through trial and error. When the grammar corrector 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’re 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—UK English, US English, Australian English, or Canadian English. Our Grammar Checker will make sure you’re chuffed to bits, just peachy, knowing you’re not making a dog’s breakfast or biffing it.

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 Check FAQs

These are some of the most Frequently Asked Questions about the grammar check tool.

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 or 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, and for those who are learning English to get acquainted with English 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 for a punctuation check. Correct punctuation is of the utmost importance when trying to communicate effectively, so we know how necessary it is for our tool to give you both a grammar and punctuation check.
Is QuillBot's Grammar Checker tool free?
Yes! Our Grammar Checker is completely free to use. No signup or payment is required.