SIMILARITY REVIEW

Turnitin Plagiarism Similarity Checker

Review matched sources and similarity signals before submission. A Similarity score is separate from an AI writing score and requires human interpretation.

  • Matched Source Review
  • Private Checking Workflow
  • Non-Repository Processing
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Upload file
Detect
TurnitChecker upload limits: .pdf / .doc / .docx · 400–28000 words · 10 MB maximum · AI detection languages: English, Spanish, Japanese · Essay/thesis format only (not presentations or scanned files)
Upload file
Detect
TurnitChecker upload limits: .pdf / .doc / .docx · 400–28000 words · 10 MB maximum · AI detection languages: English, Spanish, Japanese · Essay/thesis format only (not presentations or scanned files)

Get 1 Free Standard Check

Share your referral link. When a friend completes their first paid Standard Check, you get 1 free check.

Your friend gets a first-check discount.

Up to 10 rewards per month.

Understand Your Similarity Report

Matched Text

See highlighted text that matches content from other sources.

Source Links

Review the original sources to understand where matches occur.

Similarity Score

A percentage showing overall text similarity across your document.

A Standard Check Includes Both Similarity and AI

Get a complete view with two essential reports to help you review your document confidently.

Similarity Report

Matched sources and similarity score

AI Detection Report

AI-written text detection and likelihood score

How It Works

  1. 1

    Upload Your Document

    Upload to TurnitChecker in PDF, DOC, or DOCX (400–28,000 words, up to 10 MB).

  2. 2

    We Analyze

    We generate Similarity and AI Detection reports.

  3. 3

    Review Your Results

    Review matched sources, scores, and download your reports.

Choose the Right Plan for You

Feature
Similarity ReportMatched sources & Similarity score
✓Not included
AI Detection ReportAI-written content detection
✓iThenticate AI Detection Report only
Maximum WordsPer submission
28,000 words28,000 words
Report DeliveryTurnaround time
See current estimateSee current estimate
Private & SecureReports are not stored or shared
✓✓

Frequently Asked Questions

A Similarity Report highlights text overlap with published and web sources, and helps you review matched passages and linked sources before submission.
No. Similarity measures overlap with existing sources. Properly cited material, quotes, and common phrasing can raise a score. Human interpretation is required.
Standard Check includes a Similarity Report and a separate AI Detection Report for qualifying documents, so you can review both overlap and AI writing signals.
TurnitChecker is designed for private pre-submission checks. Your document is processed only as needed to provide the requested report and is not retained for routine long-term storage on our platform. Submissions are configured not to be added to Turnitin's student paper repository during processing.

Ready to Review Your Document?

Get your Similarity and AI Detection reports in minutes.

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