Direct answer
Direct Answer - Turnitin Precheck is a pre‑submission tool that lets students check their assignment drafts for both plagiarism (Similarity) and AI writing detection before clicking the final "Submit" button. When an instructor enables Precheck in a Turnitin LTI or Moodle assignment, students can upload a draft, receive a report showing the Similarity score and AI writing indicator, and revise accordingly — all without the draft being added to the Turnitin repository. This gives students a safe, private preview of how their work will score before the official hand‑in [1].
What Is Turnitin Precheck and What Does It Check For?
Turnitin Precheck is an optional feature that instructors activate within Turnitin's LTI 1.3 and Moodle assignment integrations. When enabled, it adds a "Precheck" button next to the "Submit" button, allowing students to run a preliminary check before finalizing their submission. The Precheck report covers two main areas: the Similarity score, which identifies text matches against Turnitin's extensive database of web pages, academic journals, and previously submitted papers; and the AI writing detection indicator, which shows an overall percentage of the document that may have been generated by an AI tool such as ChatGPT, GPT‑4, Claude, or Gemini [1].
A key feature of Precheck is that the draft is not stored in the Turnitin standard repository or the AI writing repository. This means students can run multiple Precheck attempts, revise their work, and then submit a final version — and only the final submission is permanently stored. This design encourages students to use the tool proactively without fear that a draft will permanently affect their academic record or be accessible for future similarity checks. Students see the same AI writing detection percentage and highlighted segments that their instructor will see, giving them actionable feedback on which paragraphs may need revision [2].
Precheck checks for both AI‑generated text and AI‑paraphrased content. Turnitin's detection model analyzes each sentence, scoring it between 0 (human) and 1 (AI), and the overall percentage reflects how much of the document the model predicts was produced by an AI tool. For documents submitted in English, the system also detects AI paraphrasing and AI bypasser techniques, ensuring that drafts run through humanizer tools are also flagged appropriately [1].
How Does the Turnitin Precheck Submission Process Work Step by Step?
The Precheck workflow is straightforward and typically follows this sequence:
Upload the draft. Students navigate to their assignment in the LMS, click the "Precheck" button, and upload their file (.docx,.pdf, or.txt). The Precheck button is only visible if the instructor has enabled the feature in the assignment settings [2].
Report generation. Turnitin processes the draft through its similarity matching engine and AI writing detection model. The system breaks the submission into segments of roughly a few hundred words, overlaps them for context, and runs each segment against the AI detection model to determine whether sentences are human‑written or AI‑generated. A Similarity score and AI writing indicator percentage are calculated [1].
Review the results. Within a few minutes, the student sees a report that includes the overall Similarity percentage, highlighted matched sources, the AI writing detection percentage, and highlighted text segments that the model predicts were AI‑generated. The report is visible only to the student — the instructor does not see Precheck results, which allows students to revise privately.
Revise and re‑check. Based on the results, the student can revise their draft — paraphrasing AI‑flagged sections, adding citations, or improving original analysis. Depending on the instructor's settings, students can run Precheck multiple times. For classic standard assignments, the first three attempts generate reports immediately; subsequent attempts require a 24‑hour wait. For new standard assignments, students are limited to three resubmissions per 24‑hour period [2].
Final submission. Once satisfied with the Precheck results, the student clicks "Submit" to send the final version to the instructor. This final submission is stored in the repository and generates the official Similarity Report and AI writing indicator that the instructor evaluates.
Can Students Use a Precheck-Like Service to Preview Turnitin AI and Similarity Scores Before Final Submission?
For students whose instructors have not enabled the official Precheck feature, several alternatives exist to preview Turnitin scores before final submission. The most common institutional alternative is Turnitin Draft Coach, a tool integrated into Google Docs and Microsoft Word that allows students to run similarity checks, citation checks, and grammar checks directly in their writing environment [3]. Draft Coach provides real‑time feedback and flags potential AI‑generated segments, making it a convenient substitute when Precheck is unavailable.
Another approach is using assignment resubmissions as a proxy. If the instructor has enabled resubmissions, students can upload a draft, view the generated Similarity Report and AI indicator, and then overwrite it with a revised version. However, this has limitations: classic assignments allow only three immediate reports before a 24‑hour cooldown, and new assignments cap resubmissions at three per day [2]. Moreover, each upload temporarily adds the draft to the repository until overwritten, which differs from Precheck's no‑storage policy.
For students with neither Precheck nor Draft Coach, a practical solution is to use a dedicated Turnitin preview service. Turnitin0.com allows students to upload their drafts and receive a full Turnitin AI writing report and similarity report that mirrors what instructors see in academic systems — including the AI score percentage, flagged sections, and similarity match highlights — before submitting through their school's official assignment [4]. This independent check gives students the same actionable insight that Precheck provides, with results delivered within minutes. The AI writing report follows the same display logic: scores below 20% appear as an asterisk bucket, and only 0% is shown as an explicit low numeric outcome, matching the institutional report format [4].
Whether through Precheck, Draft Coach, resubmissions, or an independent preview service, the core principle remains the same: checking your work before the final submission is the most reliable way to identify issues, revise effectively, and submit with confidence.
Turnitin0.com provides a dedicated Turnitin AI and similarity checking service that delivers the same reports your university instructors use. Upload your draft and receive a complete AI writing report and similarity report within minutes — before you ever submit to your official assignment.
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FAQ
1. Is Turnitin Precheck available in all learning management systems?
Precheck availability depends on the Turnitin integration your institution uses. It is most commonly offered in Turnitin LTI 1.3 and Moodle integrations. Instructors must manually enable the Precheck button in the assignment configuration; if you do not see it, contact your instructor or LMS administrator to ask whether it can be turned on [2].
2. Does a Precheck submission count toward my resubmission limit?
In most configurations, Precheck submissions are separate from the final submission and do not consume a resubmission attempt. However, in some assignment setups, the instructor may have configured Precheck to behave like a resubmission, in which case the standard limits — three immediate reports for classic assignments, three per day for new assignments — apply [1].
3. Can my instructor see my Precheck report?
No. Precheck reports are visible only to the student who uploaded the draft. This privacy is intentional — it allows students to experiment, identify problem areas, and revise without fear that their early drafts will influence the instructor's assessment. The instructor only sees the final submission's report [2].
4. What is the difference between Precheck, Draft Coach, and Turnitin0.com?
Precheck is an institutional feature within the LMS assignment that checks drafts without storing them. Draft Coach is a free tool for Google Docs and Word that runs similarity, citation, and grammar checks [3]. Turnitin0.com is an independent service that provides Turnitin AI and similarity reports to students who need a preview outside their institution's system — matching the same report format instructors see [4].
5. Does Precheck detect content that has been run through an AI humanizer?
Yes. Turnitin's AI detection capabilities include AI bypasser detection for English submissions. If a student has used a humanizer or bypasser tool to disguise AI‑generated text, the Precheck report will flag those segments. The AI writing indicator includes text predicted to be AI‑generated, AI‑paraphrased, or AI‑bypassed in its overall percentage [1].