Plagiarism Checker scans text against web and academic sources to flag matching or closely paraphrased passages, with a similarity score and direct links to the matched sources for each flagged section.
Paste text or upload a PDF or Word document — up to 10,000 words per check.
Checking against web and academic sources usually takes under a minute.
Open the linked source for every flagged passage, then cite or rewrite as needed.
Teachers run student essays through the plagiarism checker to identify copied passages before grading.
Editors scan freelance article submissions to ensure original content before publishing on blogs and websites.
Academics use the plagiarism checker to verify paper originality before submitting to peer-reviewed journals.
Quotes with citations, common phrases and your reference list will show up as matches. That's expected.
Click through to the matched source to see whether the overlap is a quote, a coincidence, or copied text.
Put the idea in your own words and cite the source. Rewording without a citation is still plagiarism.
Run the check again once you've revised flagged passages to confirm they're resolved.
It's designed to flag closely paraphrased passages as well as exact matches, not just verbatim copying.
The plagiarism checker indexes billions of web pages, public academic databases (PubMed, arXiv, JSTOR snippets), and major content repositories.
No. Your text is checked against existing sources but never added to the plagiarism database. Auto-deletes within 24 hours.
The plagiarism checker achieves 95%+ match accuracy on benchmark tests. Quoted material (in quotes with attribution) is detected separately from copied passages.
Yes. The plagiarism checker supports 30+ languages with cross-language match detection (translated plagiarism).
Semantic similarity matching catches lightly paraphrased content. Heavy paraphrasing or genuine rewriting may not register as plagiarism — combine with our AI Detector for full verification.
Yes. Download a PDF report with highlighted matches, source URLs, and originality score — suitable for academic submission or editorial archival.
30-60 seconds for most texts. Longer documents (5,000+ words) may take 90 seconds.
3 scans per day on guest and free accounts. Pro gets 50/day, Business unlimited. No credit card for any tier.
Identifies whether your content was written by AI or a human.
Scans your text and corrects grammatical errors and writing mistakes.
Translates your PDF content into another language while keeping formatting.
Rewrites AI-generated content to sound natural and human.
