Turnitin submission errors can feel urgent, especially when a deadline is close, but they are usually technical file-reading problems rather than an academic integrity accusation. If your file will not upload, stays stuck on processing or returns a conversion error, Turnitin is often struggling to open, extract or convert the document before any similarity report or AI detection review can run.
The fastest fix is to separate two questions: can Turnitin read the file, and what will Turnitin report after it reads it? This guide focuses on the first problem, why a file may not process and what to do before you lose time on the wrong fix.
Turnitin submission errors are usually file processing problems
Turnitin has to do several things before your instructor sees a report. The platform receives the file through Turnitin directly or through a learning management system such as Canvas, Blackboard or Moodle. It then checks the file type, converts the document into a viewable format, extracts the text and sends that text through the similarity workflow.
If your school has enabled AI writing detection, that step also depends on readable text. A file that cannot be opened or converted will not give Turnitin much useful material to evaluate. If you are trying to understand the AI side after a successful upload, Detection Drama’s guide to the Turnitin AI scanner explains what students can and cannot check themselves.
That distinction matters because many students assume every Turnitin problem is related to AI-generated content. In reality, a file can fail because it is a scanned PDF, a corrupted Word document, an unsupported file type, a password-protected upload or simply too large for the assignment settings.
Quick diagnosis: what the error usually points to
The exact wording varies by institution and LMS, but the pattern usually tells you where to look first.
| What you see | Likely cause | First thing to try |
|---|---|---|
| File type not supported | The document extension is not accepted for that assignment | Save a fresh copy as .docx or a text-based PDF |
| Could not extract text | The PDF is scanned, image-only or heavily flattened | Export from the original word processor instead of scanning |
| File too large | Images, appendices or embedded media pushed the file over the limit | Compress images or submit the required written component only |
| Stuck on processing | Server queue, complex formatting or LMS session issue | Wait briefly, refresh, then try a clean .docx copy |
| Upload button fails | Browser, connection or login session problem | Sign out, clear cache or switch browser |
| Report never appears | Assignment settings, processing delay or instructor visibility setting | Check your receipt and ask the instructor if needed |
Turnitin publishes its own file type and size guidance, but your course settings can be narrower than Turnitin’s general limits. Always follow the assignment instructions first.
Common reasons your Turnitin file may not process
The file type is not accepted for that assignment
A format may be readable on your computer but still fail inside Turnitin or inside the LMS integration. For example, a Pages file from macOS, a ZIP file, a LaTeX source file, a screenshot folder or a cloud shortcut may not upload as a normal paper submission.
The safest default is usually a current Microsoft Word .docx file unless your instructor specifically requests PDF. If you use Google Docs, download the document rather than uploading a link. A link to a cloud file is not the same as the document itself, and permission settings can block access.
The PDF contains images instead of selectable text
This is one of the most common causes of Turnitin submission errors. A scanned PDF may look perfect to you because the pages are visible, but Turnitin needs underlying text it can extract. If you scanned printed pages, exported from a note-taking app or combined image pages into a PDF, the platform may see pictures rather than words.
You can test this quickly by opening the PDF and trying to highlight a sentence with your cursor. If you can only select a whole page or a box, the PDF is probably image-based. Go back to the original Word, Google Docs or Pages file and export a new PDF with selectable text.
The document is password-protected or restricted
Turnitin may reject files that require a password, block copying, contain unusual permissions or include certain digital protection settings. These restrictions can stop the system from extracting text even when the file opens on your device.
Create a new unrestricted copy from the original document. In Word, use Save As rather than relying on a previously protected version. In PDF software, check the document properties and remove security restrictions if you are allowed to do so.
The file is too large or too complex
Large images, screenshots, scanned appendices, embedded charts and media files can make a file difficult to process. A 2,500-word essay can become oversized if every page contains high-resolution images or if the PDF was created from scans.
Compression helps, but do not reduce the file so aggressively that text becomes unreadable. If the assignment allows it, place large data tables, images or appendices in a separate supporting file and submit the main written paper in the required Turnitin upload.
Hidden formatting can confuse conversion
Tracked changes, comments, text boxes, floating shapes, unusual fonts, equations, bibliography plug-ins and copied web formatting can all complicate conversion. These features are not automatically wrong, but a messy document has more ways to break during upload.
Before submitting, accept or reject tracked changes if your instructor does not need to see them, delete resolved comments and simplify layout-heavy sections. If your paper relies on equations or figures, ask whether the written explanation should be submitted through Turnitin and the technical materials submitted separately.
How to fix a Turnitin submission error before the deadline
Start with the least destructive repair: save a fresh copy. Open the original file, save it under a new name and try submitting that version. Use a simple filename such as last-name-course-assignment.docx rather than one with emojis, symbols or very long text.
If that does not work, use this repair sequence:
- Save the paper as .docx unless the assignment specifically requires PDF.
- If using PDF, export from the word processor instead of printing, scanning or taking screenshots.
- Remove password protection, editing restrictions and unusual security settings.
- Accept tracked changes and remove comments unless the instructor asked for them.
- Compress large images, but keep text clear and readable.
- Try a different browser and make sure you are not using an expired LMS session.
- Take a screenshot of the error with the time visible in case you need proof.
Do not rewrite the paper just because the upload failed. A processing error usually means Turnitin cannot read the container, not that the content itself is suspicious.
What not to do while troubleshooting
Avoid turning a clean document into a worse file. For example, do not screenshot every page and combine the images into a PDF. That often creates the exact problem Turnitin was complaining about, an image-only document with little or no extractable text.
Do not paste the entire essay into a text box unless the assignment explicitly allows text-entry submissions. Pasted text can lose footnotes, italics, tables, spacing and citation formatting. It may also create a mismatch between what you intended to submit and what your instructor receives.
Repeated resubmissions can also create confusion. Some assignments allow multiple attempts, but others do not. Even when resubmission is allowed, reports may refresh or change as Turnitin processes the paper again. If you later notice a different result, this guide on why a Turnitin AI score changed overnight explains common report timing and processing factors.
If Turnitin is stuck on “processing” for a long time
A file can upload successfully and still show a processing message. Short delays are normal, especially near deadlines when many students submit at the same time. The platform may also need extra time for long documents, heavily formatted files or LMS synchronization.
Check whether you received a digital receipt. A receipt is often the best evidence that the submission reached the system, even if the report is not ready yet. Save the receipt, take a screenshot of the processing status and avoid deleting the upload unless your instructor tells you to resubmit.
If the status does not change after a reasonable wait, try downloading your submitted file from the LMS if that option exists. Confirm that the uploaded document is the file you intended, not a shortcut, blank draft or wrong attachment. If everything looks correct but the report is still unavailable, contact your instructor or campus support.
When to contact your instructor or help desk
Contact someone before the deadline if the error blocks submission and you cannot solve it quickly. A concise message works better than a long explanation. Include the course name, assignment title, exact error message, file type, time of attempted submission and what you already tried.
You can write something like this:
I attempted to submit my paper to Turnitin at 8:42 p.m., but the upload returned a processing error. I tried saving a fresh .docx file, removing comments and using another browser. I have attached a screenshot of the error and can provide the file directly if needed.
That message shows that you acted in good faith, attempted reasonable fixes and documented the issue. It also gives the instructor enough information to decide whether to reopen the assignment, accept an email copy temporarily or direct you to technical support.
Prevent processing problems on future uploads
Build a small pre-submission routine, especially for major assignments. Finish the document early enough to test the upload, keep the original editable file and export only from that source. Avoid last-minute format conversions from unfamiliar apps.
For research papers, check that your citations, references and appendices are part of the file in the way your instructor requested. If your institution uses Turnitin as both a similarity checker and an AI content detector, treat upload readiness and writing integrity as separate checks. A document can upload perfectly and still raise questions about sources, authorship or revision history.
That is why a good pre-submission review should include both technical file checks and evidence of your writing process. Detection Drama’s guide to the best pre-submission check for Turnitin AI risk covers the non-technical side, including draft history, citation accuracy and policy compliance.
Frequently Asked Questions
Does a Turnitin processing error mean my paper was flagged for AI? No. A processing error usually happens before Turnitin can analyze the text. It means the platform had trouble uploading, converting or extracting your file.
Why does my PDF fail when it opens fine on my computer? Your computer can display image-based PDFs, but Turnitin needs extractable text. If the PDF was scanned or made from screenshots, export a new text-based PDF from the original document.
Is .docx better than PDF for Turnitin? Often, yes. A clean .docx file is usually easier for Turnitin to parse than a complex or scanned PDF. Still, follow the file type required by your instructor.
What should I do if Turnitin fails right before the deadline? Take screenshots, save any receipt or error message and contact your instructor immediately. Attach or offer the file only if your course policy allows it.
Can a corrupted file cause Turnitin to reject my submission? Yes. If the file opens slowly, shows recovery warnings or behaves strangely, copy the content into a fresh document and save a new version before uploading.
Keep the file issue separate from the report issue
When a Turnitin file will not process, fix the document first: format, size, permissions and text extraction. After the upload succeeds, then you can think about the similarity report, citation checks or AI detection questions your course policy may involve.
For more practical Turnitin and AI detection context, browse Detection Drama before your next submission rather than waiting until an upload error or unexpected report creates a deadline problem.
