Plagiarism Detector

Identify potential plagiarism across nearly every language, detect AI-generated content, and confirm authenticity and ownership with the Copyleaks Plagiarism Detector.

The plagiarism detection tool trusted by leading organizations and institutions:

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Plagiarism Detector report

Plagiarism Has Evolved,
So Should Your Detection

We check for plagiarism using advanced AI to detect even the slightest variations within the text. Our plagiarism detector can find hidden characters, paraphrasing, and AI-generated content.

Take it beyond word-for-word plagiarism detection with the only platform that:

Plagiarism Detector report

What You're Getting

AI-Generated Content Detection

With 99.12% accuracy, the only enterprise solution designed to detect whether content was written by a human or AI —including ChatGPT-4—across multiple languages including 

  • English
  • French
  • Spanish
  • German
  • Italian
  • Russian 
  • Polish
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Scheduled Recurring Scans​

New content is being created at an unprecedented rate. Stay on top of how yours is being used with recurring scans that automatically keep your content safe from potentially plagiarized or unlawful duplication, adding a new layer of protection for your content.

Source Code Plagiarism Detection

Copyleaks is the only platform that can check source code for originality and in multiple code languages, including JAVA, Python, C++, and more.

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Unprecedented Search Results​

Along with the ability to read over 100 human languages, each scan with our online tool searches across trillions of pages of original content, along with:

  • 60 trillion websites
  • 1M+ internal documents
  • 16,000+ open-access journals
  • 20+ code data repositories
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Cross-Language Plagiarism Detection

Supporting over 30 cross-language plagiarism scans, you can scan a document in English and find plagiarism and duplicate content matches in Chinese, German, and Portuguese.

File Comparison Tool​​

Compare two files against one another to ensure originality and prevent accidental and unintentional plagiarism.

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In-Depth Site Comparison

SiteCompare lets you thoroughly compare two sites for potential content lifting, copyright infringement, multiple forms of plagiarism(including mosaic and accidental plagiarism), and much more.

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A Reporting Experience Like No Other​

Every accurate plagiarism detector scan gives you a clear, comprehensive, interactive similarity report. Plus, you can download and even choose to share the findings report. It’s all up to you.

Build Your Organization

Invite individual members or an entire department from your organization, set up unique user-friendly scan profiles, view and share Similarity Reports, and more.

Grant Full Access ​

Collaborate without being limited. Invite colleagues, clients, or classmates and share all of Copyleaks’ capabilities with them under one secure account.

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Military-Grade Security

With military-grade 256-bit encryption and SSL connection, your content and account are always safe and secure. And since Copyleaks is a fully self-service platform, only you have control over your account and those you share it with, which is never exposed to third parties or other users.

Get Plagiarism Detection Where You Need It


Individual Use

A student or freelancer? Start using the Copyleaks Plagiarism Detector today for free!

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For Enterprise Use

Need automatic plagiarism detection for your business? Harness the power of the Copyleaks Plagiarism Detector right from your native platform with seamless API integration.

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For Educational Institutes

In education? Our simple LMS integrations allow you to scan essays, physical assignments, and more within your learning management system.

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Copyleaks' tools give us an opportunity to help teachers save precious time that they can utilize to provide more personalized instruction to students while helping them understand the importance of academic integrity.

Kinsey Rawe, SVP & GM,Courseware & Instructional Services for Imagine Learning.

Building Digital Trust and Confidence:
It’s the Copyleaks Way

Frequently Asked Questions (FAQ)

With Copyleaks, we use the very best of AI, Machine learning, Multi-Language capability, and Multi-Layered and extensive search capabilities to provide you with the most accurate plagiarism results.

Of course, any plagiarism-detecting tool can miss small elements. However, we work hard at Copyleaks to ensure that we provide an extensive anti-plagiarism detector that checks your work to ensure 100% authenticity.

Though you are inputting your work into plagiarism detection software, it is essential to note that we will never steal your work. We will check your work for plagiarism and allow you to download a report based on our checks.