PlagiarismCheck.org

What PlagiarismCheck.org is

PlagiarismCheck.org is a text-checking service for reviewing originality, authorship and possible AI-generated writing. It can identify exact matches, substitutions, and changes in word order or sentence structure, then present interactive results and downloadable PDF reports. Users can check two pages for free in a browser, without installing the service. The site claims 99% accuracy in detecting even slight signs of AI. It also offers writing checks, and higher-education customers get grammar, spelling and punctuation checking alongside AI detection and authorship verification.

The service is available on the web, as an extension and through an API. Listed integrations include Moodle, Google Classroom, Canvas, Blackboard and a Google Docs add-on. The company says uploaded texts remain confidential and are not kept in its database. Individual paid page bundles are one-time purchases: Basic costs $5.99, paid once for 20 pages, Light costs $9.99, paid once, Standard costs $25.49, paid once, and Premium costs $45.49, paid once. Institutional Pro and Advanced plans are available by quote. The company says it created the service in 2011 as an aid for college students and teachers.

Who it suits

It suits students, teachers, writers and organizations that need to check text originality or review possible AI-generated content. Schools, higher-education and research institutions, and businesses can consider the institutional plans; the API is limited to English text submissions of at least 80 characters.

Limits

The free plan covers two pages. The Basic bundle costs $5.99, paid once and covers 20 pages; the API accepts only English text and requires at least 80 characters per submission.

Getting started

1. Open https://plagiarismcheck.org/ in a browser.
2. Use the web service to check up to two pages for free.
3. Choose a paid page bundle if you need more checking.
4. Use the extension or API if that access route suits your workflow.
5. For institutional Pro or Advanced plans, request a quote.

Verdict

Choose PlagiarismCheck.org if you need originality, authorship or AI-content checks with browser access and PDF reports. Its free allowance offers a way to check two pages, while paid page bundles use one-time charges. Look elsewhere if you need API processing for non-English text or want an institutional price without requesting a quote.