Plagiarism Checker X
Plagiarism Checker X is Windows desktop software for checking documents and text against published web pages for plagiarism and similarity.
What Plagiarism Checker X is
Plagiarism Checker X is Windows desktop software for checking documents and text against published web pages for plagiarism and similarity. Its online checker compares content with more than 16 billion published pages, while Bulk Comparison examines multiple documents across one or more repositories. A side-by-side view places two pieces of content in separate windows to help locate similar passages. The maker says its AI detector indicates whether content may have been produced by an AI tool or written by a human. A readability checker assesses reading levels and difficulty and extracts keywords. Reports mark matches with colors and references; listed export formats are Word, PDF, and Excel. The software handles Word, PDF, text files, and other textual formats. Its interface is available in English, Spanish, French, German, Italian, Dutch, and Portuguese, and it supports content from hundreds of languages. The maker says documents remain 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; Business costs $147.95, paid once.
Good
- Online checks cover more than 16 billion published pages.
- Bulk Comparison can analyze multiple documents across repositories.
- Reports can be exported in Word, PDF, or Excel.
- The free Basic plan is available.
- The maker says documents stay on the user's computer during scanning.
Watch out
- Basic has limited words and a daily search limit.
- Professional costs $39.95, paid once.
- Business costs $147.95, paid once.
- Available on Windows.
Who it suits
It suits students, teachers, writers, universities, colleges, and SEO agents who need to check text or compare documents. Its readability tools may also suit users assessing reading level and text difficulty.
Verdict
Plagiarism Checker X combines web-page similarity checks with document comparison, readability tools, and report exports. The free Basic plan has usage limits, while paid plans are one-time purchases.
Plans and prices
From Plagiarism Checker X's own pricing page, checked 7 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Basic | Free | Limited words · Daily search limit · 20+ languages support · Free forever |
| Professional | $39.95, paid once | 1 user license · Unlimited words · Online similarity check · Text comparison · Built-in Word/PDF support · Lifetime package license · 24/7 customer support · 1 year maintenance plan included · Pay once, use forever |
| Business | $147.95, paid once | 5 users license · Branding reports · Priority support · All Professional features included · Pay once, use forever |
The facts
Each one read from Plagiarism Checker X's own pages, with the date it was checked.
What it does
- 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.checked 7 Oct 2026
- Bulk comparison
- Bulk Comparison analyzes multiple documents within one or more repositories to determine originality.checked 7 Oct 2026
- File formats
- The software supports text files including Word and PDF documents, with other textual formats also supported.checked 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.checked 7 Oct 2026
- Online checking
- Online plagiarism checking compares content against more than 16 billion published pages.checked 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.checked 7 Oct 2026
- Privacy policy
- The company says its privacy policy incorporates the EU GDPR and Data Protection Act 2018.checked 7 Oct 2026
- Purpose
- The desktop software checks documents and text for plagiarism and similarity against published web pages.checked 7 Oct 2026
- Readability
- The readability checker analyzes reading levels, extracts keywords, and assesses text difficulty.checked 7 Oct 2026
- Reports
- Reports highlight matched similarity with colors and references and can be exported as Word or PDF documents.checked 7 Oct 2026
- Side by side
- Side-By-Side Difference displays content in two windows to help locate similar text.checked 7 Oct 2026
- Support
- The pricing page lists 24/7 customer support with Professional and priority support with Business.checked 7 Oct 2026
- Who it serves
- The maker describes the product for students, teachers, writers, universities, colleges, and SEO agents.checked 7 Oct 2026
The company
- Founded
- 2012checked 28 Sep 2026
- Headquarters
- 733 3rd Avenue, New York City, NY 10017, United Stateschecked 28 Sep 2026
Money
- Notable free limit
- The free Basic edition has limited words and a daily search limit, while the paid version has unlimited words.checked 7 Oct 2026
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