How to Use Turnitin Self Checker
Table of Contents
- What is Turnitin Self Checker and How Does It Work?
- How Do I Interpret the Turnitin AI Writing Report and Similarity Score?
- How Can I Reduce My Turnitin AI Detection Score Before Final Submission?
- FAQ
- Sources
- Related articles
Direct Answer - Turnitin Self Checker allows students to preview their Similarity Report and AI Writing Report before submitting an assignment for grading. To use it, locate the Self-Checker link in your Turnitin-enabled assignment (typically via your LMS), upload your.docx,.pdf, or.txt file (minimum 300 words of prose text, under 100 MB), and wait a few minutes for the report to generate. The preview shows your overall AI detection percentage, similarity match highlights, and submission breakdown — exactly what your instructor will see — so you can revise and resubmit up to three drafts before the final deadline [1].
What is Turnitin Self Checker and How Does It Work?
Turnitin Self Checker is a student-facing preview tool integrated into Turnitin Feedback Studio assignments. Unlike the final submission workflow, Self Checker gives you a risk-free opportunity to review how your draft will score before it reaches your instructor's inbox.
The tool checks your document against two databases simultaneously: Turnitin's vast similarity repository (comprising web pages, academic journals, and previously submitted student papers) and its AI writing detection model. The AI detection model analyzes qualifying text — prose sentences in a long-form writing format — and classifies them into AI-generated, AI-paraphrased, or human-written categories. If the overall AI score falls between 1% and 19%, Turnitin displays it as an asterisk (*%) rather than a specific number, as the model is less reliable at these lower thresholds [1].
To access Self Checker, navigate to your assignment dashboard through your institution's learning management system (Canvas, Blackboard, Moodle, etc.). Look for a "Self-Checker" or "Check for Originality" link next to the assignment. Submission limits apply — typically up to three previews per assignment — so use each check strategically as you refine your work.
How Do I Interpret the Turnitin AI Writing Report and Similarity Score?
Once your Self Checker report generates, you will see two distinct sections. The Similarity Report displays a percentage that reflects how much of your text matches existing sources. Highlighted passages link directly to the matched source, making it easy to identify areas that need proper citation or paraphrasing. A high similarity score does not automatically mean plagiarism — it could indicate heavy use of direct quotations or common phrases — but it does signal that your instructor may flag those passages.
The AI Writing Report shows a separate percentage indicating how much of your qualifying text Turnitin's model has identified as likely AI-generated or AI-paraphrased. The report breaks this down into two subcategories: "AI-generated only" (highlighted in cyan) and "AI-generated that was AI-paraphrased" (highlighted in purple). An interactive submission breakdown bar lets you click on highlights to jump directly to the flagged text on each page [1].
Remember that the AI score and similarity score are independent of each other. A document can have a 0% similarity score but a high AI detection percentage, or vice versa. Self Checker also applies the same display rules as the instructor view: any AI score below 20% appears as *% to reduce the risk of false-positive misinterpretation.
How Can I Reduce My Turnitin AI Detection Score Before Final Submission?
If your Self Checker preview shows a high AI detection percentage, you still have time to revise before submitting. Since Self Checker allows multiple draft checks, you can iteratively adjust your writing and re-verify the results.
The most effective approach is to focus on areas flagged as "AI-generated" or "AI-paraphrased" in the report. Rewrite those passages in your own voice, incorporating your original analysis and sentence structures. Reduce or eliminate text that was directly generated by an LLM tool such as ChatGPT, Claude, or Gemini — Turnitin's detection model is trained specifically to identify patterns common to these systems, including consistent sentence length, predictable transition phrasing, and lack of personal voice [1].
For students who have already written substantial portions with AI assistance and need a comprehensive solution, an AI humanizer tool can rewrite flagged text while preserving your original meaning and academic quality. These services adjust word choice, sentence rhythm, and structural patterns to make the prose read as naturally human-written, potentially reducing the AI detection score to *% or even 0%. Because Self Checker updates with each re-submission, you can humanize your draft, upload it again, and confirm the new score before final submission.
※ Turnitin0.com - Actual Turnitin AI Report Cover, Score, Flag And Similarity Summary
FAQ
How many times can I use Turnitin Self Checker per assignment?
Most institutions limit Self Checker to three previews per assignment. Use each check strategically — upload your draft at different revision stages (first draft, revised draft, final polish) to track improvement.
Does Turnitin Self Checker save my paper to the repository?
No. Self Checker is a preview-only tool. Your draft is not stored in Turnitin's student paper repository, so it will not create a similarity match against future submissions. Only the final submission to the assignment will be stored.
What file formats does Self Checker accept?
Self Checker accepts .docx,.pdf,.txt, and.rtf files. Your document must contain at least 300 words of prose text in a long-form writing format and be under 100 MB in size [1].
Can Self Checker detect AI paraphrasing tools like Quillbot?
Yes. Turnitin's English AI detection model includes AI paraphrasing detection (highlighted in purple). Text that was likely AI-generated and then modified by a paraphrasing tool is flagged separately from original AI-generated text (highlighted in cyan) [1].
What does it mean if my AI score shows as *%?
Turnitin displays any AI detection score between 1% and 19% as an asterisk (*%) rather than a specific number. This is because testing has shown a higher incidence of false positives in this range. A *% result means the AI writing indicator is unreliable at this level and should not be used as the basis for academic decisions [1].
Sources
- Turnitin Guides — Using the AI Writing Report — https://guides.turnitin.com/hc/en-us/articles/22774058814093-Using-the-AI-Writing-Report
- Turnitin Help Center — Self-Checker for Students — https://helpcenter.turnitin.com/hc/en-us/articles/22777571726605
- Turnitin — AI Writing Detection Capabilities FAQs — https://guides.turnitin.com/hc/en-us/articles/23379372864653-AI-Writing-Detection-Capabilities-FAQs
- Turnitin Blog — Academic Integrity and AI Writing — https://www.turnitin.com/blog/academic-integrity-and-ai-writing