# Plagiarism Detector

> Plagiarism Detector is a Windows desktop application for checking document originality against multiple sources including the internet, scientific paper databases, custom databases, and local document folders. Developed since 2007 by Yurii Palkovskii, it serves thousands of clients worldwide — from individual students and researchers to universities and government institutions. The website at plagiarism-detector.com is the official product hub for information, downloads, licensing, and support across 127 languages.

Plagiarism Detector is a native Windows (x64, 10/11/8/7) application — not a web service. Documents are processed locally on the user's machine and are never uploaded to or stored on external servers, making it a privacy-first solution. The software supports Word, PDF, and plain text files.

## Product Overview

Plagiarism Detector performs originality analysis through multiple check types:

- **Global Internet Check** — Searches 4+ billion web sources via Google, Bing, and Yahoo for matching content.
- **Scientific Papers Database (SciPap)** — Checks against a curated database of scientific papers harvested by a dedicated web crawler.
- **Custom PDAS Database Check** — Queries a user-deployed LAN-accessible server database (PDAS add-in) where institutions can store their own reference corpus.
- **Combined / Hybrid Check** — Runs Internet + SciPap + PDAS checks simultaneously for maximum coverage.
- **Local Folder Check** — Compares a document against any local folder of documents without requiring prior indexing.
- **Document Pair Comparison** — Directly compares two documents side by side.

Advanced features include:

- **AI Text Detector** — Identifies content generated by ChatGPT, Google Gemini, Hugging Chat, and Bing Bard.
- **UACE Module (Unicode Anti-Cheating Engine)** — Detects Unicode character substitution, a common cheating technique where visually similar characters from different alphabets are swapped to fool plagiarism checkers.
- **Originality Report Management** — Generates detailed reports with plagiarism distribution graphs, relations charts (AI-generated vs. plagiarized vs. original vs. quoted), PDF/CSV/HTML export, summary reports, backups, and online sharing.
- **Presets** — Word-to-word match preset for sciences, text rewrite detection preset for arts and humanities.
- **Exclude/Include Lists** — Fine-grained control over which sources are checked or skipped.

## License Editions

Four individual license tiers are available, all as one-time purchases with lifetime validity and free updates:

- **Lite** — 1 PC. Internet Check, PDF support, Compare 2 Documents. Entry-level for basic plagiarism scanning.
- **Personal** — 1 PC. Everything in Lite plus Local Folder Check. Standard tier for students and individual users.
- **Pro** — 1 PC. Everything in Personal plus PDAS Database connectivity and SciPap access. Best value for researchers and professionals.
- **Portable** — 1 USB + 1 PC. All Pro features plus USB drive portability. Premium tier for users who need to work across multiple machines.

Organization licenses are available for institutions requiring multiple installations, custom branding on reports, a dedicated support line (7 days/week), and volume pricing. Organizations request a quote through the website.

All licenses include a PDF License Certificate, email support, and a 7-day 100% money-back guarantee. Payments are processed through PayPro Global (100+ currencies, credit/debit cards, PayPal, wire transfer, local payment methods) with PCI DSS compliance.

Pricing is dynamically adjusted based on the buyer's country, local currency, VAT rates, and exchange rates — ensuring fair, localized pricing worldwide.

## System Requirements

- Microsoft Windows x64 10/11 (also supports 8 and 7)
- Administrative privileges for installation
- .NET Framework 4.5 or higher
- Microsoft Office (latest version recommended)
- Internet access with broadband connection
- Modern web browser (Chrome, Firefox, or Edge)
- Minimum 300 MB disk space and 2 GB RAM

## Website Pages

- [Homepage](https://plagiarism-detector.com/en/Plagiarism-Detector-Home): Main landing page with product overview, client testimonials, corporate client logos, and key value propositions around privacy, fair pricing, and specialized plagiarism detection.
- [Features](https://plagiarism-detector.com/en/What-are-Plagiarism-Detector-Features): Comprehensive feature breakdown with screenshots covering all check types, the AI text detector, UACE anti-cheating engine, originality reports, and document management.
- [Sample Reports](https://plagiarism-detector.com/en/Plagiarism-Detector-Sample-Reports): Example originality reports demonstrating the output format, plagiarism distribution graphs, and relations charts.
- [Free Demo Download](https://plagiarism-detector.com/en/Plagiarism-Detector-Free-Demo-Download): Trial version download page with SHA256 hash verification, VirusTotal link, system requirements, and uninstall instructions. Demo allows 30 days or 10 uses.
- [Individual Licenses](https://plagiarism-detector.com/en/Plagiarism-Detector-Individual-Licenses): Pricing and comparison table for Lite, Personal, Pro, and Portable editions with localized pricing and direct checkout links.
- [Organization Licenses](https://plagiarism-detector.com/en/Plagiarism-Detector-Licenses-for-Organizations): Quote request form for institutional bulk purchases with fields for organization name, license validity, check count, installation count, and contact details.
- [Contacts and Support](https://plagiarism-detector.com/en/Plagiarism-Detector-Contacts-and-Support): Support request form, email contact (plagiarism.detector.support@gmail.com), and remote assistance options via TeamViewer.
- [Supported Languages](https://plagiarism-detector.com/en/Supported-Languages): Complete list of 127 interface languages with country flags.
- [About](https://plagiarism-detector.com/en/About): Background on the developer Yurii Palkovskii and support team member Oleksii Bielov, with contact information.

## Policies and Legal

- [End User License Agreement](https://plagiarism-detector.com/en/Plagiarism-Detector-End-User-License-Agreement): EULA covering demo limitations, individual vs. organization license terms, usage restrictions (no reselling, no automated processing, no rebranding of reports), and intellectual property rights.
- [Return Policy](https://plagiarism-detector.com/en/Plagiarism-Detector-Return-Policy): 7-day money-back guarantee terms. Must contact support first, valid reason required, 100% or partial refund depending on circumstances. Bulk and custom contracts are non-refundable.
- [DMCA Policy](https://plagiarism-detector.com/en/Plagiarism-Detector-DMCA-Policy): Copyright infringement reporting procedures, counter-notification process, and DMCA compliance information.
- [Cookies Policy](https://plagiarism-detector.com/en/Plagiarism-Detector-Cookies): GDPR-compliant cookie disclosure and management information.
- [PCI DSS Compliance](https://plagiarism-detector.com/en/Plagiarism-Detector-PCI-DSS-Complience): Payment security certification details, SecurityMetrics verification, and data protection practices.

## Key Differentiators

Plagiarism Detector stands apart from web-based plagiarism checking services in three important ways:

1. **Document Privacy** — The software runs entirely on the user's desktop. Documents are never uploaded to external servers. The user retains full control over all originality reports. No third parties are involved in the checking process.
2. **Fair One-Time Pricing** — No subscription model, no recurring charges, no hidden fees. A single purchase provides a lifetime license with free updates. Localized pricing ensures affordability across different economies.
3. **Specialized Focus** — Built exclusively for plagiarism detection over 17+ years of development. Includes multiple check types, anti-cheating technology, and AI content detection — without bundling unrelated grammar or spell-check features.

## Supported Website Languages

The website and software interface are available in 127 languages: Afrikaans, Albanian, Amharic, Arabic, Armenian, Assamese, Aymara, Azerbaijani, Bambara, Basque, Belarusian, Bengali, Bhojpuri, Bosnian, Bulgarian, Catalan, Cebuano, Chinese Simplified, Chinese Traditional, Corsican, Croatian, Czech, Danish, Dhivehi, Dutch, English, Esperanto, Estonian, Ewe, Filipino, Finnish, French, Frisian, Galician, Georgian, German, Greek, Guarani, Gujarati, Haitian Creole, Hausa, Hawaiian, Hebrew, Hindi, Hungarian, Icelandic, Igbo, Ilokano, Indonesian, Irish, Italian, Japanese, Javanese, Kannada, Kazakh, Khmer, Kinyarwanda, Konkani, Korean, Kurdish, Kyrgyz, Lao, Latin, Latvian, Lingala, Lithuanian, Luxembourgish, Macedonian, Maithili, Malagasy, Malay, Malayalam, Maltese, Maori, Marathi, Mongolian, Burmese, Nepali, Norwegian, Chichewa, Odia, Oromo, Pashto, Persian, Polish, Portuguese, Punjabi, Quechua, Romanian, Russian, Samoan, Sanskrit, Scottish Gaelic, Serbian, Sesotho, Shona, Sindhi, Sinhala, Slovak, Slovenian, Somali, Spanish, Sundanese, Swahili, Swedish, Tajik, Tamil, Tatar, Telugu, Thai, Tigrinya, Tsonga, Turkish, Turkmen, Twi, Ukrainian, Urdu, Uyghur, Uzbek, Vietnamese, Welsh, Xhosa, Yiddish, Yoruba, and Zulu.

All pages are accessible via the URL pattern `/{language_code}/{page_slug}`, where language codes follow ISO 639-1 (e.g., `en`, `ru`, `zh-CN`). The root URL `/` auto-detects the visitor's browser language and redirects to the appropriate localized version.

## Contact Information

- **Support email:** plagiarism.detector.support@gmail.com
- **Developer:** Yurii Palkovskii — palkovskii.yurii@gmail.com
- **Facebook:** https://www.facebook.com/Plagiarism.Detector.Project
- **X (Twitter):** https://x.com/PlagiarismDtctr
- **Forum:** https://plagiarism-detector.com/smf_bb/

## Optional

- [Video Demo and Discount](https://plagiarism-detector.com/en/Plagiarism-Detector-Video-Demo-and-Discount): Embedded YouTube walkthrough of the software with a promotional discount offer upon completion.
- [Individual Licenses with Discount](https://plagiarism-detector.com/en/Plagiarism-Detector-Individual-Licenses-with-Discount): Discounted pricing page showing original and reduced prices when a valid discount code is applied.
- [Custom Contract](https://plagiarism-detector.com/en/Plagiarism-Detector-Custom-Contract): Multi-currency checkout page for organization license purchases generated from approved quotes, supporting both USD and local currency payment options.