Free Plagiarism Checker
Find potential matching sources for selected sentences via a live search provider. See source URLs and snippets - your text is never stored.
Only short quoted searches are sent to the configured search provider. Your full text is never stored.
Turn output into a monitored workflow
A Novaverb workspace crawls your live site, verifies these tags and files are actually served, tracks changes over time, and turns findings into assigned work.
Plagiarism Checker
What this checker actually does
It searches your sentences, in quotes, against pages the search engine has indexed. Where that exact wording is already published, you get the real URL, title and snippet - evidence you can open and read yourself.
How to read the result
- A match means identical wording exists on a public page. It does not say who published first, and it cannot tell a quotation from a copy.
- No match is not proof of originality. The source may sit behind a login, in print, or on a page the engine never indexed.
- Percentages describe the sentences we searched, never the whole document. The report always prints both numbers.
Before you publish
- Open each source and compare context, dates and attribution.
- Rewrite or cite according to your publisher's policy.
Plagiarism Checker FAQ
Does it store my text?
No. The full passage is processed only for the request. Only a quota counter and returned source URLs are handled; the passage is not saved.
How does this plagiarism check work?
It takes selected sentences from your passage and searches for them as exact quotes through a live search provider, then shows the pages that came back with their URLs and snippets. It compares against what that provider has indexed - not against a private academic database.
Why does it check some sentences and not others?
Each sentence costs one live search, so the checker spends its budget on the longest sentences, where an exact match is least likely to be coincidence. Sentences it did not search are listed as not checked rather than quietly counted as clean.
What does a result of no matches mean?
That the searched sentences were not found in the provider's index. It is not proof the text is original: sources behind a login, in a PDF that was never indexed, or paraphrased rather than copied will not surface.
Why did it flag a sentence I wrote myself?
Common phrasing, quotations, legal or technical boilerplate and standard definitions appear on many pages. A match tells you the wording exists elsewhere; whether that matters depends on context and attribution, which only you can judge.
Does duplicate content cause a Google penalty?
Ordinary duplication is a consolidation problem, not a punishment: search engines pick one version to show and the rest earn nothing. That is a real cost, and a canonical tag is usually the fix. Scraped or wholesale-copied sites are a separate matter.
Can I use this result to accuse someone?
No. This surfaces potential sources for a human to inspect. Any decision about misconduct needs the original source read in full, the dates checked and the attribution examined - none of which a search result can settle.
Are matches proof of plagiarism?
No. Search results identify potential sources. You must inspect the source, context and attribution yourself.
Is my data uploaded anywhere?
No. This generator runs fully client-side in your browser. Nothing you type is sent to a server, so it is safe to use on private content.
Is it really free?
Yes, with no account. A Novaverb workspace is only needed when you want to verify, monitor, and track these files on your live site over time.