Free Plagiarism Checker
Paste any text. We scan the live web for matching phrases and show you exactly which URLs already published them.
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What's new in the Plagiarism Checker
- Launched — phrase-level web matching with source URLs.
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Frequently Asked Questions
How does this plagiarism checker work?
We split your text into ~10-word phrases and search the live web for each as an exact match. If a phrase already appears on an indexed page, we list the matching URL — that's likely the original source.
Is my text stored?
No. We send phrases to a search index to look for matches, then discard them. Nothing is saved to a database, account, or training set.
How accurate is it?
A matched phrase is high-confidence — the exact 10-word string was found on that URL. A clean result means none of the sampled phrases were found verbatim; lightly paraphrased copy may still slip through, like with any free tool.
What's a good plagiarism score?
Under 10% is fine for most original writing (common phrases will occasionally match). 10–30% means several passages are duplicated and need rewriting. Over 30% is heavy copying — replace before publishing.
Does Google penalize duplicate content?
Google doesn't issue a 'duplicate-content penalty', but identical text causes Google to pick one canonical URL and bury the others. Original content always ranks better.