Free Plagiarism Checker
Instantly check if text was copied from the web. Free, unlimited, no account required.
Results will appear here
Paste your text and click Check Plagiarism to get started
Source Links
See exactly which websites match your student's text.
Match Percentage
Get a precise similarity score for every submission.
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Trusted by thousands of teachers worldwide
Frequently Asked Questions
How does the plagiarism checker work?
We search the web for text that closely matches your submission and calculate a similarity score. Matched sources are shown with links so you can verify results directly.
Is it really free?
Yes — completely free with no account required. For teachers who also want AI grading, sign up for a free VibeGrade account.
How accurate is the detection?
Our checker uses semantic search to find matches even when text is lightly paraphrased. It works best on essays and long-form writing.
Can I also check for AI-generated content?
Yes! VibeGrade also offers a free AI detector. Try it at vibegrade.com/detect.