Free grammar checker

Grammar is the set of rules that shape how we organize words to make meaningful sentences. Correct grammar helps ensure your writing is clear, coherent, and impactful.

The Grammar Checker now goes a step further to help improve your writing style, fluency, and tone. You can still use it to check grammar, but now the tool does even more.

When you grammar check online, you’ll receive detailed feedback on clarity, engagement, and sentence flow—plus access to rewriting tools and contextual AI commands that adapt to your writing task, whether academic, creative, or professional.

AI Chat and AI Detection are now available as part of the experience.

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

QuillBot’s Grammar Checker reviews your writing for both simple and complex errors, suggesting necessary changes. It considers your writing’s meaning and context, so you can fix your grammar while keeping tone and clarity consistent. Our tool also offers real-time writing feedback, with integrated paraphrasing and rewriting tools. Plus, it works seamlessly across multiple browsers, Word, and macOS.

So no matter where you’re working, our tool helps you grammar check online.

Anyone can use QuillBot’s Grammar Checker. It’s ideal for professionals, ensuring their work is error-free; students checking assignments before submission; and language learners improving fluency and accuracy. QuillBot supports English grammar checks, as well as other languages, including German, French, Spanish, Brazilian Portuguese, Swiss German, and Dutch.

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.

Yes, Grammar Checker also works as a punctuation checker, identifying and fixing misplaced commas, missing semicolons, and more, so your sentences are always clear and polished. Grammar is vital when communicating effectively, so make sure to check grammar and punctuation before sharing your writing.

QuillBot goes beyond just grammar checking to support every stage of the writing process. We also provide powerful tools like our Grammar Checker, AI Humanizer, AI Detector, and Plagiarism Checker to help ensure clarity, originality, and authenticity in every piece of writing. We also offer

AI Chat

Yes! Our AI Grammar Checker is completely free to use. There is no sign up or payment required.

Yes, QuillBot goes beyond simple grammar checks to refine your writing tone and style.
You can make your text sound more formal, creative, or natural with contextual AI feedback that enhances fluency and flow, all while preserving your unique voice.

Absolutely. With AI-powered insights into clarity, engagement, and readability, you can track your progress over time and continuously refine your writing skills. So you’re writing gets better every time you use QuillBot’s Grammar Checker free of charge.

1. Paste or type your text into the box.
2. QuillBot instantly highlights grammar, spelling, and punctuation errors for review.
3. Evaluate our suggestions and accept or reject them based on preference. c.
4. Go further by reviewing suggestions for fluency and tone to offer better readability.

QuillBot works in six different languages (English, Spanish, German, Dutch, French, and Portuguese) and several different dialects. Supported dialects include Swiss German as well as several different varieties of English. On the other hand, Grammarly only works in English dialects.