How to Use Turnitin for a Pre-Submission Check

Published at June 04, 2026·By James Peng

Table of Contents

• What a Pre-Submission Turnitin Check Actually Does
• Three Legitimate Ways to Preview Before the Graded Upload
• Step-by-Step: Run a Pre-Check Through Your School System
• How to Read Your Similarity and AI Reports During Preview
• What You Should Do Before You Upload
• FAQ
• Sources
• Related articles

What a Pre-Submission Turnitin Check Actually Does

A pre-submission check runs your draft through Turnitin’s reporting stack before your instructor grades the final upload. When set up correctly, you receive the same two report families most Turnitin-enabled courses use:

Similarity report. The headline percentage shows how much of your text matches Turnitin’s database and your instructor’s comparison settings. Turnitin treats this number as a starting point for review, not an automatic plagiarism verdict—properly quoted material, common phrases, and bibliography entries can all contribute depending on assignment filters (Turnitin Guides: Accessing the Similarity Report).

AI writing report. This is separate from similarity. Turnitin states that the AI percentage is independent of the similarity score and that AI highlights do not appear inside the Similarity Report (Turnitin Guides: Using the AI Writing Report). Instructors are expected to apply human judgment and institutional policy; AI detection should not be the sole basis for misconduct findings.

What a preview cannot promise: It does not replace your instructor’s rubric, prove misconduct either way, or guarantee an identical score when you upload to the graded assignment. Database updates, file-format differences, and instructor exclusion settings can shift results between runs. The value is decision time—fix citations, rewrite flagged prose, or email your instructor while edits are still cheap.

Quick answer: Use the same file type you plan to submit (.docx or .pdf), run both reports when available, and read flagged passages—not only the headline numbers—at least 24–48 hours before the portal closes.

Three Legitimate Ways to Preview Before the Graded Upload

Turnitin does not give every student a standalone “check my paper” button. The help center is explicit: students cannot self-check inside Turnitin without submitting to an instructor-created assignment—unless the school enables Turnitin Draft Coach or provides a practice slot (Turnitin Help Center). That leaves three common, syllabus-compliant paths:

Path 1 — LMS draft assignment (most common). Many instructors create a low-stakes Turnitin assignment labeled “draft,” “practice,” or “optional check.” Upload your near-final file there first. If resubmissions are enabled, you can replace the file after edits. On Canvas, open the assignment → Submit Assignment → upload → wait for the Similarity Report icon to appear (often 5–15 minutes, sometimes longer at peak times). Moodle and Blackboard follow the same pattern: submit through the course-linked Turnitin tool, not a third-party upload form on a random webpage.

Path 2 — Turnitin Draft Coach. Some universities enable Draft Coach as a Google Docs add-on. It lets you preview similarity feedback while drafting. Availability is institution-specific—search your library or IT help site for “Draft Coach” before assuming you have access. Draft Coach is useful for early citation fixes; it may not mirror every setting on your final graded assignment.

Path 3 — Independent preview with official reports. When your course has no draft slot and Draft Coach is unavailable, some students use a paid preview service that returns official Turnitin similarity and AI writing reports on a private copy of the draft. This is not a substitute for the LMS pipeline—it is a rehearsal on the same report types instructors typically read. Skip any seller promising to “clear” scores, remove AI flags automatically, or bypass institutional review.

Reddit pattern (community experience): Threads about pre-submission checks often split into two camps—students who got a practice assignment from a helpful TA, and students who panicked the night before because their course had no resubmission slot. The practical lesson is identical: find out which path your syllabus allows during week one, not on deadline night.

If you want to see how similarity and AI patterns show up on your draft—not a classmate’s screenshot—preview your Turnitin reports while you still have a full revision window.

Preview your Turnitin reports before you submit →

Step-by-Step: Run a Pre-Check Through Your School System

Treat the session like a lab protocol: same file, same order, same notes.

Before you start (10 minutes)

1. Read the syllabus for rules on outside uploads, AI disclosure, and resubmission limits.
2. Freeze a content-complete draft—checking a half-finished introduction wastes a run.
3. Export the exact file you will submit (.docx or .pdf). Turnitin’s AI report accepts .docx, .pdf, .txt, and .rtf, needs at least 300 words of qualifying prose in long-form writing, and caps at 30,000 words (Turnitin Guides: Using the AI Writing Report).
4. Name the version clearly (Essay_v2_48h.docx) so you do not accidentally submit an old export to the graded slot.

During the LMS upload (15–30 minutes active; processing may take longer)

1. Open the draft or practice assignment—not the final graded one if your instructor separated them.
2. Upload once; do not refresh obsessively. Similarity processing commonly finishes in minutes but can queue during deadline weeks.
3. When the report icon appears, open Similarity first. Note the top matched sources, uncited strings, and reference-list overlap.
4. Open the AI writing report second. Note which sentences highlight, not only the headline indicator.
5. Write a one-page action list ranked by effort: missing quotation marks and page numbers before full paragraph rewrites when similarity drives the problem.

After the first run (same day)

• Schedule a follow-up check on a re-exported file if your syllabus allows another upload.
• Email your instructor if policy is unclear—especially when AI highlights cover sections you thought were fully human-written.

Canvas-specific tip: If you only see similarity and not AI, your institution may hide the AI report from the student view until after the instructor release. Ask whether your preview will show the same AI panel the instructor reads.

Common beginner mistakes:

• Previewing a .docx but submitting a .pdf with different pagination.
• Deleting the bibliography to shrink similarity—that creates new integrity problems.
• Comparing Turnitin’s AI percentage to a non-Turnitin consumer checker and treating the gap as “proof” something is wrong.

How to Read Your Similarity and AI Reports During Preview

Numbers only help if they change your next hour of work.

Similarity report: read matches, not just the percentage

Open each major source link in the match breakdown. Ask:

• Is this a missing citation or a missing quotation mark on a block quote?
• Is the match from your own prior submission stored in Turnitin’s repository?
• Is the overlap from the reference list or common phrases your instructor may already exclude?

A double-digit similarity score is not automatically “bad.” Literature reviews, methodology sections, and heavily cited introductions often cluster matches. Your job in preview is to explain or fix each flagged passage before the graded upload.

AI writing report: read highlights and display rules

Turnitin documents important display behavior beginners should know before screenshotting a number:

• Scores below 20% may show as *% (an asterisk) rather than a single-digit percentage, because the model carries higher false-positive risk in that range.
• 0% is the usual explicit low numeric outcome students see.
• The detector focuses on qualifying prose in long-form writing. It does not reliably score poetry, scripts, code, bullet lists, or tables the same way—essays that mix prose with structured sections can show a gap between the headline percentage and highlighted sentences.

Do not treat *% as a free pass or 0% as proof no instructor will ask questions. Read which sentences highlight and compare them to your syllabus AI policy.

When preview results disagree with your expectations

High similarity you cannot explain: Wrong file merged, a group template left in, or an old draft uploaded by mistake. Stop and compare file metadata before rewriting.

AI highlights on prose you machine-smoothed: Rewrite with your own analysis—add why a source matters to your argument, not generic summary language.

Clean similarity but surprising AI flags: Check short polished sections (introductions, conclusions) where chatbot phrasing often hides.

Worked scenario (composite student experience): Jordan, a first-year sociology student, used the course’s optional Turnitin draft slot 36 hours before the final deadline. Similarity sat at 19%—mostly an uncited paraphrase from a journal abstract until Jordan added a page number and tightened the wording. AI highlights covered the opening paragraph Jordan had smoothed with a writing assistant. After rewriting that section in their own voice and re-exporting the same .docx, similarity dropped to 11% and AI highlights moved off the thesis sentence. The preview did not “pass” the paper; it bought time to fix honest mistakes.

What You Should Do Before You Upload

Use this checklist on the file you plan to submit for a grade:

1. Confirm the correct assignment slot—draft vs final, correct course, correct attempt number.
2. Match file type and content to what you previewed; no last-minute PDF export unless you re-check.
3. Fix similarity issues first when uncited quotes or missing references drive the report.
4. Rewrite flagged AI prose with your own analysis; add required AI disclosures using syllabus wording exactly.
5. Re-export and re-check if you made major edits and your syllabus allows another run.
6. Keep dated drafts in case your instructor asks how you revised.
7. Do not post report screenshots publicly if your program treats them as confidential.

When to email before the graded upload:

• You see high similarity you cannot explain after checking file versions.
• AI highlights cover sections you believed were fully human-written.
• Your student LMS view hides AI scores but your syllabus references AI review—instructors may see panels you do not.

Short email template:

Subject: [Course] [Assignment] – question before final upload
Hi Professor [Name], I previewed my draft and saw [similarity/AI highlights] in [section]. I plan to [cite/rewrite/disclose]. Is that approach acceptable before I submit tonight? Thank you, [Name]

Before you upload

Step 5 is where deadline week is won or lost: preview both similarity and AI on the exact file you plan to upload. If you have not done that yet, run your draft once while you can still edit citations and body paragraphs.

Check your draft for similarity and AI detection →

FAQ

Can I run my paper through Turnitin before submitting without an instructor assignment?

Not inside Turnitin itself unless your school gives you Draft Coach or a practice assignment (Turnitin Help Center). Many students without LMS draft slots use an independent preview that returns official Turnitin similarity and AI writing reports on a private copy—confirm your institution allows outside uploads first.

How do I use Turnitin for a pre-submission check in Canvas?

Open the draft or practice Turnitin assignment your instructor created → Submit Assignment → upload your file → wait for processing → open the Similarity Report from the submission view. If resubmissions are enabled, upload a revised file after edits. Use the course-linked tool only—not unrelated websites.

What is Turnitin Draft Coach and how do I access it?

Draft Coach is Turnitin’s Google Docs add-on for in-document similarity feedback. Access depends on your institution’s license—search your university library or IT site for setup instructions. It helps with early citation fixes but may not mirror every setting on your final graded assignment.

How long does a pre-submission Turnitin check take?

Similarity processing often finishes in 5–15 minutes but can queue during peak deadline windows. Independent preview services typically deliver both reports within minutes; allow extra time the night before a major deadline in case of queue delays.

What does *% mean on the Turnitin AI report?

When Turnitin’s AI indicator shows *%, the model detected a range below 20% where false positives are more common; 0% is the usual explicit low number. Read highlighted sentences and follow your course AI policy—do not treat *% as automatic clearance.

Is checking Turnitin before submitting cheating?

Previewing your own draft to find missing citations or awkward machine-smoothed prose is generally consistent with academic integrity if your syllabus allows the check and you do not misrepresent authorship. When unsure, ask your instructor or writing center.

Should I fix similarity or AI first?

Similarity first when uncited quotes, missing references, or pasted summaries drive the report. AI first when similarity is already clean but highlights cover sections you know you polished with a generative tool. Re-check both metrics after major edits.

Where can I run both Turnitin reports if my course has no draft slot?

Services such as Turnitin0 let you upload .docx, .pdf, or .txt and receive official Turnitin similarity and AI writing reports for pre-submission review; papers are not archived or sent to third-party databases. Confirm your syllabus allows outside checks before uploading.

Will my preview score match my LMS submission exactly?

Not always. File changes, export format, database updates, and instructor exclusion settings can shift results. Previews reduce surprises; they do not guarantee identical numbers on the official attempt.

Sources

• Turnitin Guides: Accessing the Similarity Report
• Turnitin Guides: Using the AI Writing Report
• Turnitin Help Center: Can students check a paper before submitting?

Related articles

• Does Turnitin Flag Ai Use?
• Turnitin Ai Flagged My Work
• How to Avoid Turnitin Flagging Ai: What Actually Lowers the Score
• Turnitin Ai Detection
• Pre‑Defense Turnitin Checks: What Committees Look for Beyond the Percentage