Our proofreading system alerts you to opportunities to improve your writing

Find out if your paper contains plagiarized text before your professor does
We compare your text to over 10 billion documents

Proofread your writing with PaperRater’s free online grammar and plagiarism checkers

Requiring no downloads, the proofreader and plagiarism checker use AI to scan your essays and papers for any errors and assign them an automated score
This will help you correct any grammatical and spelling mistakes, address unintentional instances of plagiarism and earn a higher grade for your work

Simply copy and paste your writing into the online editor or upload your file and click ‘Get Report’!

Grammar and Writing Resources

Confused about what a subordinate clause is? Or baffled by the difference between traveled and travelled? Clear your doubts related to grammar, spelling and writing with these detailed articles and explanations:

• Which is Correct, ‘Laying’ or ‘Lying’?
• What are Participle Phrases and How to Use Them
• An Introduction to British Slang Words
• Lists of Adjectives Categorized by Types of Nouns
• What is the Difference Between ‘Co-Worker’ and ‘Coworker’?
• How Do You Spell ‘Separated’?
  You want instant gratification and so do we
  Using Artificial Intelligence and Data Science, submissions are analyzed in real-time with results typically appearing 5-15 seconds after submission
  PaperRater’s cloud-based software digs deep into the syntax and structure of your text without the need to sign up, login, or download
  You won't find another tool offering plagiarism checking, automated proofreading, grammar check, and automated scoring that can analyze your text this quickly

Is Feedback Missing From Your Feedback Loop?

The best time to receive feedback is before you turn your assignment in
Sometimes valuable feedback comes too late, which is why our automated proofreading tool can be especially helpful -- not just for detecting grammar, punctuation, and spelling errors, but also for giving helpful tips that make you a better writer
Our AI engine, Grendel, works tirelessly providing feedback that you can incorporate into your text before you pass it on for a final grade from a human

We use this word a lot to describe our service
It's fast, free, requires no downloads or signups, and offers state-of-the-art results
Maybe this is why our grammar check tool is used by thousands of students every day in over 140 countries
If you haven't put our service to the test, give it a try now and see what all the buzz is about

• PaperRaters for Teachers and Educators
• How does PaperRater’s Plagiarism Checker Work?