Plagiarism Checker
N-gram analysis
Detects repeated 5-word sequences that signal templated or reused writing.
Lexical diversity
Unique word ratio. A direct measure of vocabulary richness in your content.
No word limit
Paste full articles, essays, or reports without truncation or signup.
External checker links
Results include direct links to Copyscape, Quetext, and Duplichecker.
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About Plagiarism Checker
Plagiarism checking compares text against indexed web content to find matching or substantially similar passages. Content that was copied, paraphrased closely without attribution, or generated by an AI model trained on copyrighted material may match existing published content. Running a plagiarism check before publishing helps writers, editors, and publishers catch unintentional duplication and protect against takedown requests.
This tool checks input text for matching content across publicly indexed web pages. Paste the text you want to verify and the checker returns any passages where significant overlap was detected, with source URLs. It is useful for checking student submissions, verifying freelance content before paying, or confirming that AI-generated drafts do not closely mirror existing published articles.
How it works
What gets measured
N-gram analysis
Detects repeated 5-word sequences that signal templated or reused writing.
Lexical diversity
Unique word ratio. A direct measure of vocabulary richness in your content.
Sentence uniqueness
Checks how many sentences share structure and phrasing with each other.
No word limit
Paste full articles, essays, or reports. No truncation, no signup.
External checker links
Results include direct links to Copyscape, Quetext, and Duplichecker for web verification.
Free forever
No account required. Check as many documents as you need.