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Plagiarism Checker X
733 3rd Avenue, New York City, NY 10017, United States
What it is
Plagiarism Checker X is Windows desktop software for checking documents and text for plagiarism and similarity against published web pages. Its online checker compares content against more than 16 billion pages. Bulk Comparison examines multiple documents within one or more repositories, while Side-By-Side Difference places two pieces of content in separate windows to help locate similar text. The maker says its AI detector indicates whether content may have been produced by an AI tool or written by a person. A readability checker analyzes reading levels, extracts keywords, and assesses text difficulty. Reports identify matches with colors and references, and can be exported as Word, PDF, or Excel files. The software supports Word and PDF documents, text files, and other textual formats. Its interface is available in seven languages, and it supports content from hundreds of languages. The maker says documents stay on the user's computer during scanning and customer content is not copied, stored, or sold. Basic is free with limited words and a daily search limit; Professional costs $39.95, paid once, and Business costs $147.95, paid once.
For and against
For
- Compares content against more than 16 billion published pages
- Bulk Comparison analyzes multiple documents
- Reports export to Word, PDF, or Excel
- Supports content from hundreds of languages
- Maker says documents remain on the user's computer
Against
- Windows platform only
- Free Basic has limited words and daily searches
- Professional costs $39.95, paid once
- Business costs $147.95, paid once
The verdict
Plagiarism Checker X combines similarity checking, text comparison, readability analysis, and report exports in Windows desktop software. Its free Basic edition has word and daily-search limits, while paid plans offer unlimited words.
Who it suits
It suits students, teachers, writers, universities, colleges, and SEO agents who need to review text for similarity. Windows users can choose a free Basic edition or one-time paid plans.
Plans and prices
Basic
Limited words · Daily search limit · 20+ languages support
Read 7 Oct 2026 · plagiarismcheckerx.com
Professional
1 user license · Unlimited words · Online similarity check · Text comparison
Read 7 Oct 2026 · plagiarismcheckerx.com
Business
5 users license · Branding reports · Priority support · All Professional features included
Read 7 Oct 2026 · plagiarismcheckerx.com
On the record
- AI detection
- The maker says its AI-generated content detector indicates whether content may have been produced by an AI tool or written by a human.plagiarismcheckerx.com · read 7 Oct 2026
- Bulk comparison
- Bulk Comparison analyzes multiple documents within one or more repositories to determine originality.plagiarismcheckerx.com · read 7 Oct 2026
- File formats
- The software supports text files including Word and PDF documents, with other textual formats also supported.plagiarismcheckerx.com · read 7 Oct 2026
- Language support
- The software interface is available in English, Spanish, French, German, Italian, Dutch, and Portuguese, and it supports content from hundreds of languages.plagiarismcheckerx.com · read 7 Oct 2026
- Notable free limit
- The free Basic edition has limited words and a daily search limit, while the paid version has unlimited words.plagiarismcheckerx.com · read 7 Oct 2026
- Online checking
- Online plagiarism checking compares content against more than 16 billion published pages.plagiarismcheckerx.com · read 7 Oct 2026
- Privacy
- The maker says documents remain on the user's computer during scanning and that customer content is not copied, stored, or sold.plagiarismcheckerx.com · read 7 Oct 2026
- Privacy policy
- The company says its privacy policy incorporates the EU GDPR and Data Protection Act 2018.plagiarismcheckerx.com · read 7 Oct 2026
- Purpose
- The desktop software checks documents and text for plagiarism and similarity against published web pages.plagiarismcheckerx.com · read 7 Oct 2026
- Readability
- The readability checker analyzes reading levels, extracts keywords, and assesses text difficulty.plagiarismcheckerx.com · read 7 Oct 2026
- Reports
- Reports highlight matched similarity with colors and references and can be exported as Word or PDF documents.plagiarismcheckerx.com · read 7 Oct 2026
- Side by side
- Side-By-Side Difference displays content in two windows to help locate similar text.plagiarismcheckerx.com · read 7 Oct 2026
- Support
- The pricing page lists 24/7 customer support with Professional and priority support with Business.plagiarismcheckerx.com · read 7 Oct 2026
- Who it serves
- The maker describes the product for students, teachers, writers, universities, colleges, and SEO agents.plagiarismcheckerx.com · read 7 Oct 2026
