Plagiarism Checker
Free plagiarism checker — compare your text against sources for similarity and get a report of matching passages. Powered by AI, fast and no signup.
About the Plagiarism Checker
This free plagiarism checker analyses your writing for passages that closely match existing sources, helping students, writers and editors submit original work with confidence. Paste your text or upload a document and it returns a similarity assessment with the sections that look copied.
The analysis is powered by AI, so treat the report as a helpful guide rather than a definitive verdict. Use it to catch accidental copying, over-quoted passages and phrasing that needs rewording before you publish or submit.
How to Use the Plagiarism Checker
- 1Paste your text or upload the document you want to check.
- 2Run the plagiarism check and wait for the analysis.
- 3Review the similarity report and any matching passages.
- 4Reword the flagged sections, then re-check as needed.
Frequently Asked Questions
How accurate is the plagiarism check?
The tool is powered by AI and gives a strong indication of copied or over-similar text, but no automated checker is perfect. Always review the flagged passages yourself before drawing conclusions.
Does it check against the whole internet?
It compares your text against sources it can reference to gauge similarity. It is best used to catch obvious matches and phrasing that needs rewording, not as a legal originality guarantee.
Is my text stored?
Your text is sent to the AI service only to produce the report and is not kept afterwards, so your writing stays private.
How can I lower my similarity score?
Rewrite flagged sentences in your own words, add proper citations for quotes, and reduce long verbatim passages. Re-running the check confirms your changes reduced the overlap.