Free AI Sentence Checker
Polish your sentences in seconds. Use Grammarly’s free sentence checker to ensure your writing is clear, compelling, and easy to read. Just enter your text where it says "check my sentences" to check for run-on sentences, tone, clarity, and more.
Work With the Industry-Leading
Sentence Checker
Grammarly’s free AI sentence checker ensures clear, mistake-free writing for essays, emails, blog posts, and beyond. Instantly correct errors and improve clarity so you can be confident that your writing presents your ideas in its best light.
Ensure Accuracy
Refine and clarify sentences while preserving their original meaning.
Speed Up Your Work
Edit with a single click, saving time on manual proofreading.
Prioritize Readability
Simplify complex text to ensure your message is easy to understand.
Enjoy for Free
Check your sentences for free, with no ads or hidden costs.
How To Use Grammarly’s Online Sentence Correction Checker
Using Grammarly’s AI sentence checker for all your English writing needs is easy. Just follow the steps below:
Add your text, and Grammarly will underline any issues.
Hover over the underlines to see suggestions.
Click a suggestion to accept it.
Who Can Use Grammarly’s Free
Sentence Checker
Our AI sentence checker has something for everyone.
Professionals
Craft polished emails, add clarity to documents, and more.
Students
Submit mistake-free assignments and save time on editing.
Researchers
Simplify complex academic writing to make it easy for everyone to understand.
Teachers
Polish information for educational materials like lesson plans and presentations.
Journalists
Streamline the editing process and make sure every article is mistake-free.
Marketers
Polish campaign messages and improve clarity for increased audience engagement.
Frequently Asked Questions
How does Grammarly’s sentence checker work?
Grammarly's AI analyzes your sentences in real time to offer suggestions on how to improve your writing.
Where can I use Grammarly’s sentence checker?
You can use the sentence checker on this page. Or you can download Grammarly to get AI-powered writing assistance on all of your sentences. Grammarly works in your browser, across all of your favorite desktop apps, and on your phone.
What are run-on sentences, and how can I avoid them?
Run-on sentences are a type of grammar mistake that happens when two or more clauses are joined incorrectly. You can fix run-on sentences by adding a semicolon or a conjunction with a comma between the clauses. Or you can simply split the sentence into two or more separate sentences.
What are sentence fragments, and how can I improve them?
A complete sentence needs both a subject and a verb. When one of those is missing, you end up with a sentence fragment. It's OK to use sentence fragments in casual writing, but it's best to stick to complete sentences in more formal situations.
How can I strengthen my sentence structure?
One of the best ways to check your sentence structure is to read it out loud. If you get lost partway through or find yourself tripping over certain phrases, you can try rewriting your sentence or breaking it into simpler ones.
Improve Your Sentences
Want to write better sentences? The Grammarly blog is here to help. Read the articles below to learn how to craft clear, polished sentences without a sentence checker.
Works Where You Write
Grammarly works in 500,000+ apps and websites so you can improve your writing without copying, pasting, or breaking focus.
More AI Writing Assistance
From Grammarly
Grammarly helps you generate drafts, polish punctuation, and work faster so you can spend less time on small details and more time on big ideas.
Ensure Your Grammar Is Great
Catch and correct grammatical errors, spelling mistakes, and punctuation inaccuracies with Grammarly’s grammar checker.
Grammar Checker →
Grammar Checker →
Avoid Accidental Plagiarism
Locate potential plagiarism in your text and see areas to add citations with Grammarly's plagiarism checker.
Plagiarism Checker →
Plagiarism Checker →
Cite in Seconds
Get well-formatted APA, MLA, and Chicago-style citations with Grammarly's citation generator.
Citation Generator →
Citation Generator →
Summarize With Ease
Move Work Forward With Great Writing
Join over 30 million people and 70,000 teams who use Grammarly every day
for better writing and better results.
for better writing and better results.