Free Plagiarism Checker
A free plagiarism checker is an originality review tool that checks text for duplicated phrasing, source overlap, weak attribution, and citation gaps. Paste a draft to get a transparent risk score, repeated-phrase highlights, and a practical rewrite checklist.
Check Originality
Paste a draft, add source text when you have it, and review the citation trail.
Manual Review Checklist
Review method
How to use this plagiarism checker
- 01
Paste the draft text you want to review.
- 02
Paste suspected source text if you need direct phrase-overlap checking.
- 03
Choose the citation status that best matches the draft.
- 04
Review the originality score, repeated phrases, and citation signals.
- 05
Rewrite risky passages, add quotes, and cite sources before publishing.
- 06
Copy the review report for your editing notes.
Plagiarism Checker FAQ
What is a plagiarism checker?
A plagiarism checker reviews text for duplicated wording, source overlap, weak attribution, and citation gaps so writers can fix risk before publishing or submitting work.
Can this tool prove that text is original?
No. This tool gives a transparent originality-risk estimate. Final decisions still require source review, citation checks, and editorial judgment.
How does the source overlap check work?
Paste a suspected source excerpt and the checker compares five-word phrase matches between the draft and source text.
What should I do if the score shows high risk?
Quote exact copied language, cite the original source, rewrite paraphrases with a new structure, and verify every claim against the source trail.
Does this checker send text to a server?
No. The checker runs in your browser using local heuristic analysis. It does not submit your pasted text to an external plagiarism database.
Related Tools
Pair originality review with source-first verification.
Lie Library tools help reviewers move from similarity checks to evidence: verify claims, inspect source credibility, and document the citation trail.