Web check
—/8 found
Not run yet
Checks the most distinctive sentences as exact phrases on the web.
Only the listed sentences are sent to the search API — never the full text.
Free tool
Plagiarism Checker
Two checks, no account. Web: the most distinctive sentences of your text are searched as exact phrases and matching pages are listed with snippets. Own sources: compare against reference documents you paste — that part never leaves your browser. We do not store what you check.
Input
Text to check
Own sources
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Paste your reference texts below to compare offline.
Text
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Distinctive sentences
What gets searched
The most unique sentences of your text. Each has a one-click exact-phrase search you can run yourself — nothing leaves your browser until you click.
Compare with your own sources
Local originality
How it works
Honest about what a free checker can do
Distinctive-sentence sampling
Copy is easiest to spot in long, specific sentences. We pick up to eight of them (rare words, numbers, no near-duplicates) and search each as an exact phrase — the same technique a careful teacher uses by hand.
Verbatim vs. similar
A page counts as a verbatim match only when its snippet shares a run of eight or more consecutive words with your sentence. Weaker hits are shown as “similar results” so you can judge.
Your own corpus, offline
Paste earlier drafts, a source article, or a colleague’s report. Overlap is measured on 5-word sequences and the longest shared run is shown. Nothing is uploaded.
One-click manual search
Every sentence has Google and Bing exact-phrase links. Even without the automatic check you can verify a text in a minute.
What leaves your browser
Only the sampled sentences, only when you press “Check the web”, only to the search API. Never the full text, never stored by us.
What it cannot do
Paraphrase detection, translated plagiarism, paywalled or academic databases (that is Turnitin territory), or proof of AI authorship.
Questions
Is this as good as Turnitin?
No. Turnitin/Ouriginal search academic databases and previously submitted papers. This tool searches the public web with a sample of sentences. It catches copy-paste from websites well and paraphrase poorly.
Why only eight sentences?
Each sentence is one search query and the free search quota is limited. Eight distinctive sentences catch the vast majority of copied texts; if a text is copied, most of its distinctive sentences are.
The web check button is disabled — why?
The daily search quota is exhausted or the deployment has no search key configured. The per-sentence Google/Bing links still work, and the own-sources comparison is unaffected.
What does “coverage” mean in the local comparison?
The share of your text’s 5-word sequences that also occur in the source. Above ~50% is essentially the same text; 15–50% means significant reuse; below that, common phrases.
Can it detect AI-written text?
No tool can prove that. For stylistic signals, TextClean has a Detect tab — treat it as a hint, never as evidence.
Need a real originality pipeline?
Semantic (paraphrase-aware) similarity over your own document base, cross-language matching, batch reports — talk to us; it is a variant of the retrieval work we do for KnowledgeRAG.
Need paraphrase-aware similarity on your own documents?
Embedding-based matching across drafts, tenders or theses, deployed on your infrastructure. Same technology as our KnowledgeRAG platform.