Plagiarism checker that shows you exactly what matched

Paste your text and get matched passages shown side by side with their sources, plus a one-click path to fix each one: add quotation marks, add the citation, or rewrite in your own words with the citation kept. And unlike most free checkers, this one tells you exactly what it scanned.

What this checker scans, stated upfront

This tool checks your text against open-access academic papers, the sources you provide, and, inside the workspace, the sources saved to your assignment and your own past submissions (so you catch accidental self-plagiarism).

What it does not do is scan “the entire internet” or your university’s private submission database. No free tool does, including the ones that claim to. Turnitin’s database of past student papers is Turnitin’s; nothing outside your university can check against it. Any checker that promises your paper will “pass Turnitin” is selling you a false sense of safety.

What this checker is for: catching the matches you can actually fix before submission, especially the most common real-world case, which is paraphrasing a source too closely while citing it, or forgetting the citation on a passage you summarized weeks ago.

How to read your results

Every match shows your passage and the source passage side by side, with the overlapping phrasing highlighted, the source identified, and a judgment-free label: cited or uncited. From there:

• Legitimate quote, missing the marks: add quotation marks and the page number. One click.
• Paraphrase too close to the original: rewrite in your own words; the citation stays, because paraphrasing still requires one.
• Uncited match: add the citation, or remove the passage if you can’t identify where it came from.

A match is not an accusation. Common phrases, technical terms, and properly quoted material all match; the question is whether each match is quoted and cited correctly. That’s a judgment you make, and this tool gives you the evidence to make it.

Why we say “matches found,” not “plagiarism detected”

Plagiarism is presenting someone else’s work as your own. Whether a matching passage is plagiarism depends on quotation, citation, and intent, which no scanner can judge. Tools that stamp a percentage and a verdict on your work are guessing about the part that matters. We show the matches and the fixes; the verdict is yours to earn.

About AI detection

This page checks text similarity. If you’re looking for AI detection: our separate AI Content Checker gives an estimate of AI likelihood, clearly labeled as an estimate, because that’s what every AI detector produces, including the ones your university uses. We don’t sell tools that rewrite text to fool detectors, and we’d suggest distrust of anyone who does; those tools are one detector update away from worthless, and using them is itself the misconduct universities are policing.