# Plagiarism Checker API

> Detect plagiarism and paraphrased content across billions of web pages and academic sources via REST API. Scan PDF, Word, text, and source code.

The Copyleaks [Plagiarism Checker API](https://copyleaks.com/plagiarism-checker) checks text, documents, and source code for plagiarism by comparing them against billions of web pages, academic journals, and your own document libraries. It detects both identical and paraphrased matches, handles popular formats like PDF and Word, and can flag attempts to manipulate text to evade detection.

![Check for Plagiarism](/assets/mainpage/SampleReport-2.svg)

## Core Capabilities

<CardGroup cols={2}>
    <Card title="Unparalleled Search Capabilities" icon="magnifying-glass">
      Leverage the most comprehensive database, including billions of web pages and academic journals, to ensure unmatched accuracy in plagiarism detection.
    </Card>
    <Card title="Identical & Paraphrase Recognition" icon="clone">
      Go beyond simple text matching to identify rewritten content that maintains the original meaning, ensuring a deeper level of originality verification.
    </Card>
    <Card title="Scan Any Document" icon="file-lines">
      Upload and scan any popular document type, including PDFs, Word files, plain text and more. The Plagiarism Checker API can handle it all and maintain the original format of the document.
    </Card>
    <Card title="Source Code Analysis" icon="code">
      Uphold software integrity by detecting plagiarized code. This helps maintain academic integrity as well as compliance with licensing agreements.
    </Card>
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## Features

Our plagiarism checker is an API-first solution with unmatched flexibility and customization. This can help you build a tailored integration for your specific use case.

### Data Hubs

Copyleaks Data Hubs allows you to detect plagiarism against internal documents.
- **Shared Data Hub**: Compare your documents against millions of documents shared by other institutions.
- **Private Cloud Hub**: Have your own private data hub which you can use in order to compare your files against each other.

[**Learn more**](/concepts/features/data-hubs)

### Text Omission

When scanning documents for plagiarism, there are text segments which you may want to exclude from the scan. With Copyleaks you have the ability to choose specifically what you want to omit from the scan, including references, citations, quotes and more. Copyleaks will include in the plagiarism scan only the sections that you wish to scan.

[**Learn more**](/concepts/features/exclude-content)

### Detecting Text Manipulation

In some cases, writers will try to avoid plagiarism detection. There are techniques that are designed to obfuscate the submitted content while keeping the document look regular. With Copyleaks you have the ability to detect text manipulation attempts as part of the authenticity API scans.

[**Learn more**](/concepts/features/text-manipulation)

### Display the Plagiarism Report

Once a plagiarism scan is complete, you can display the results in a ready-to-use web report. The web report supports all the features and allows customization to fit your brand needs.

[**Learn more**](/concepts/features/how-to-display)

## Use Cases

<Tabs>
  <Tab title="Educational Platforms">
    Scan student work for plagiarism and AI content right in your platform. Compare against millions of global submissions as well as billions of online materials to prevent recycled assignments and maintain academic integrity.
    
    [**Learn more**](/concepts/use-cases/academic-integrity)
  </Tab>
  <Tab title="Publishers">
    Check articles and blogs for originality before publishing. Scan billions of sources to protect your IP, avoid SEO penalties, and keep your brand trusted.
    
    [**Learn more**](/concepts/use-cases/publishers)
  </Tab>
  <Tab title="User-Generated Content Platforms">
    Automatically moderate comments, reviews, and posts for plagiarism, AI text, and harmful content. Keep your community safe and authentic with real-time detection.
    
    [**Learn more**](/concepts/use-cases/user-generated-content-platforms)
  </Tab>
</Tabs>

## Complete Content Authenticity Platform

Our [Plagiarism Checker](https://copyleaks.com/plagiarism-checker) is even better when paired. Combine our services to build a robust solution for authenticity, safety, and quality, establishing a holistic framework for digital trust.

<CardGroup cols={2}>
  <Card title="AI Detector" icon="robot" href="/concepts/products/ai-text-detection-api">Enterprise-level offering designed to identify if content is human-written or AI-generated with superior accuracy.</Card>
  <Card title="Grammar Checker" icon="spell-check" href="/concepts/products/writing-assistant-api">Empower your users with an AI-powered assistant that corrects grammar, mechanics, and sentence structure.</Card>
</CardGroup>

## Next Steps

Ready to elevate your originality with the market's leading Plagiarism Checker?

<CardGroup cols={2}>
  <Card title="Start Building" icon="rocket" href="/guides/authenticity/detect-plagiarism-text">Follow our step-by-step guide to implement plagiarism detection in your application.</Card>
  <Card title="Try it" icon="flask" href="https://copyleaks.com/plagiarism-checker">Try the Copyleaks plagiarism checker with your content and see results in seconds.</Card>
  <Card title="Explore the API Reference" icon="code" href="/reference/actions/authenticity/overview">Dive into the complete technical documentation for all endpoints, parameters, and responses.</Card>
  <Card title="Ways to Display Reports" icon="browser" href="/concepts/features/how-to-display/">Learn about the different options for displaying plagiarism detection reports to end users.</Card>
</CardGroup>

## Frequently asked questions

### What is the Copyleaks Plagiarism Checker API?

It is a REST API that scans text, documents, and source code for plagiarism, comparing the content against billions of web pages, academic journals, and your own document libraries to find copied and paraphrased material.

### What sources does it check against?

The web (billions of pages), academic journals, and your own collections via [Data Hubs](/concepts/features/data-hubs) - the Shared Data Hub (documents shared across institutions) and the Private Cloud Hub (your own private repository).

### Can it detect paraphrased or reworded plagiarism?

Yes. Beyond identical text matching, it identifies rewritten content that keeps the original meaning, and it can also detect [text-manipulation attempts](/concepts/features/text-manipulation) used to evade detection.

### Which file types can it scan?

Popular document types including PDF, Word, and plain text, as well as source code for detecting plagiarized code.

### Can I compare documents against my own private library?

Yes, using the [Private Cloud Hub](/concepts/features/data-hubs), which lets you scan your files against each other in a private data hub.

<Card title="Schedule a Live Demo" icon="calendar-check" href="https://copyleaks.com/book-a-demo" cta="Book a Demo" arrow="true">
  Get a personalized demo and discover how to process thousands of documents seamlessly, integrate Copyleaks into your existing systems, and achieve enterprise-grade accuracy for your specific use case.
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