Plagiarism Checker
Submitted Text
Results
No sources yet. Run a scan to see matches here.
Plagiarism Checker
An AI plagiarism checker is software that scans your document, maps its ideas and wording, and then compares those patterns with massive collections of existing text. Universities use this approach to review student work; individuals use it to verify originality before sharing drafts with supervisors, editors, or journals. ZeroQuill AI crawls and indexes public content and checks your text against it, highlighting passages that resemble existing material and pointing you to the likely sources. Systems may also flag closely paraphrased wording; however, no detector is perfect, and human judgment still matters.
Feel confident your work is yours
Real-time analysis
Continuously aligned with the latest style-guide rules.
Fast, accurate, flexible
Build a full bibliography in minutes with edit-in-place controls.
Free to start
Organize, edit, and export references at no cost.
Built for real workflows
Copy a single entry or export your entire list when you’re done.
Save & resume
Reduces “Signed-in users keep reference lists safely stored for later.
Who can use Plagiarism Checker?
Teachers & Professors
Triage potential issues quickly so you can focus feedback on learning, not forensic work.
Researchers & Content Writers
Verify literature use, avoid accidental patchwriting, and maintain trust with editors and readers.
Students
Run a check before submission to protect academic integrity and catch missing citations.
Good practice: originality + ethics
A final scan is a smart step in any workflow. Use the report to confirm that ideas are attributed correctly, quotations are marked, and paraphrases are genuinely your own. Even unintentional overlap can harm credibility—clean it up before you hit submit.
Plagiarism Checker — FAQs
Using someone else’s words or ideas without proper credit—whether verbatim or paraphrased. Intent doesn’t change the definition; both deliberate and accidental cases are still plagiarism. Cite sources, use quotation marks for direct language, and paraphrase substantively in your own words.
Your document is tokenized and compared against indexed sources using semantic and lexical matching. The tool then aggregates findings into a similarity score and maps each match to locations in your text with links to potential sources.
Common text formats like .txt and .html, plus document types such as .pdf and .docx.
It can flag closely paraphrased passages when wording and structure remain very similar. That said, no system can guarantee detection of all paraphrasing. Treat results as decision support, not a courtroom verdict.
Yes. ZeroQuill AI supports scanning in 100+ languages and can compare cross-language content when public translations exist.
Decide whether to quote, paraphrase more thoroughly, or cite. Use the integrated Citation Generator to format references in APA/MLA/Chicago and update the text accordingly.
No tool can prove authorship. ZeroQuill AI can surface signals associated with AI-style text, but these are probabilistic and should be combined with policy, context, and human review.
There’s no universal threshold. Properly quoted and cited material can legitimately appear as overlap. Focus on whether a passage is quoted/paraphrased correctly and whether attribution is complete.
Your text is encrypted in transit and at rest. Content is stored to generate and retain your report, and is not sold to third parties. Integrated vendors used for matching do not retain your content.
Premium plans allocate a monthly word allowance; each scan deducts the exact word count of the document from your balance. Your history shows prior scans and word usage.