Turnitin (Plagiarism Checker)

2026/08/12 Turnitin Platform Login and security updates：
- All users (administrators, instructors, and students) are required to log in to the Turnitin system through home.turnitin.com.
- The procedures for creating student accounts and self-enrollment have been updated.
- If instructors want to allow students to join an existing class, they must enable “Allow students to self-enroll in this class” in the class settings and generate a new Enrollment Key for students to use.
- The Enrollment Key is valid for 14 days, and generating a new key will invalidate the previous one without affecting students who have already enrolled.
- Administrators must complete one-time password (OTP) verification when logging in, while the login process for instructors and students remains unchanged.
- For details, please refer to Student Self-Enrollment Guide (English) and Manual (Chinese).
Effective August 11, 2026, certain features in Turnitin instructor and student accounts will be discontinued. These changes will not affect originality checking services.
The NCHU Library's Turnitin new self-enrolling class for the 115-1 semester is open until Feb. 20, 2027.
Access: Library Homepage → Collections → Database Search → Search "Turnitin" → Click "Class ID and Class enrollment key" (log in with SSO if off-campus) → Setting up your account to join the new class.

What is Turnitin ?

Turnitin is an application of over 99 billion public web pages, 1.8 billion student papers, and over 89 million scholarly journals and articles.

Turnitin can：

Compare faculty and student works/reports/assignments with the system database.
Provide a similarity score (the percent found in the database) and generate a comparison report.
Allow authors to verify content quality before publishing.
Check for any missing citations in the reference pages.

Accepted File Formats

PDF (not encrypted, text selectable, not directly converted from Mac)
Microsoft Word, Excel, PowerPoint, WordPerfect, RTF, OpenOffice (ODT), Hangul (HWP), Google Docs, Plain Text (TXT)
PostScript, HTML

File Upload Restrictions

The file size must be less than 100 MB. If the file exceeds 100 MB, it is recommended to: (1) reduce image sizes or remove images; (2) save the PDF as a plain text file.
Maximum of 800 pages per document.
Document content must exceed 20 characters.

Supported Browsers

Chrome, Firefox, Safari, Edge