Plagiarism Checker
SEOPaste two texts and get an instant similarity score. The comparison happens entirely in your browser, so your content never leaves your device.
Paste text into both fields to compare.
The score uses the Dice coefficient on character bigrams to spot copied passages. It is a helpful indicator, not a legal verdict.
How does the similarity score work?
The tool compares two texts using the Dice coefficient on character bigrams. Texts that share many identical two-character sequences score higher, which is a strong sign of copied content.
Is my text sent anywhere?
No. The comparison runs fully in your browser, so the text you paste never leaves your device.
Frequently Asked Questions
What is Plagiarism Checker?
Compare two texts and measure the similarity between them as a percentage.
How do I use Plagiarism Checker?
Type or paste your data into the field on this page and press the button. The result is calculated instantly in your browser — nothing is uploaded.
Is Plagiarism Checker free?
Yes, Plagiarism Checker is completely free. No signup, no downloads and no usage limits.
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