VerifAI
Turnitin Self-Check
Check your Turnitin score before you submit
Most universities don't let students pre-check their work. VerifAI lets you see your Turnitin AI score and similarity score before your teacher does — without your document being saved to the database.
Check My ScoreOne-time payment · No subscription · Report in 2 min
Why you can't just check it yourself
Turnitin sells to institutions, not to students. There is no consumer account you can sign up for, and the AI writing indicator is not exposed in any free tool. The only route most students have is their university's own submission link — and that route has a catch.
When you submit through your institution, your document is typically added to Turnitin's student paper repository. If your university enables draft submissions at all, your draft is now a stored document. Submit the finished version later and it can match against your own earlier draft, producing a similarity score inflated by your own work. Plenty of students have talked themselves into a panic over a 40% similarity score that turned out to be their own draft from three weeks earlier.
A pre-submission check has to happen outside that repository to be useful. VerifAI runs your document through Turnitin's engine with repository storage off, so nothing you check here can ever be matched against anything you submit later.
How to check your Turnitin score
1. Get a check
Complete a one-time payment via Stripe — priced in your local currency. No account, no subscription, no recurring charge.
2. Upload your document
Upload your essay or paper as a PDF or Word document, between 300 and 30,000 words. Turnitin needs at least 300 words before it will assess a document for AI writing at all.
3. Turnitin analyses it
Your document runs through Turnitin's own AI and similarity checks — the same engine your institution uses. It is never saved to any plagiarism database.
4. See your scores
In under 2 minutes, download the AI detection and similarity reports in the same PDF format your teacher would receive.
What your Turnitin scores actually mean
Your report contains two numbers that get confused constantly. They come from two different systems and mean two completely different things.
AI score
- 0% — no AI-generated content detected
- *% (or NaN%) — 1–19% likely AI-generated, the lowest indicator
- 20%+ — the exact percentage is shown and may be reviewed
Similarity score
- The percentage of your text matching existing sources
- Includes matched sources, so you can fix citations
- Acceptable thresholds vary — many institutions flag above 15–25%
The most important thing to understand about the AI percentage is that it is not a probability that you cheated. It is an estimate of how much of your prose reads as machine-generated. A 15% AI score does not mean there is a 15% chance you used ChatGPT; it means roughly 15% of the assessed text was classified that way. Those are very different claims, and marking panels routinely treat the first as if it were the second.
The asterisk is worth knowing about too. When Turnitin displays an asterisk instead of a figure on a low score, it is flagging that scores in that range are less reliable — the vendor's own hedge against false positives on short or unusual passages. It is a reliability warning, not an additional accusation.
The similarity score is a different animal entirely. It compares your text against published sources, web pages, and stored student papers, and it makes no judgement about how the text was produced. A high similarity score with a correctly formatted quotation and citation is usually fine. A moderate one with no citations attached to the matched passages is the actual problem. This is why seeing the matched-source list matters more than seeing the headline number.
Why free AI checkers give you a different number
GPTZero, ZeroGPT, Copyleaks and the rest are real tools, but they run their own classifiers trained on their own data. Their output has no mechanical relationship to Turnitin's. Students regularly get 0% from a free checker and a double-digit score from their institution, or the reverse — and it is not because one of them is lying. They are simply different models answering the question differently.
If your institution uses a detector other than Turnitin, a Turnitin report will not predict its output either. Check which system your course actually uses before paying for anything — ours included.
What you get back
- Overall AI-generated content percentage
- Line-by-line AI detection highlighting, so you can see which passages drove the score
- Similarity score with every matched source, ranked by overlap
- Downloadable PDF in the same format as institutional reports
- The full breakdown your teacher would see — nothing withheld
The line-by-line highlighting is the part worth your attention. A headline percentage tells you almost nothing actionable; the highlighted passages tell you whether the score is concentrated in one summarised paragraph you rewrote at 2am, or spread evenly across the whole document. Those two situations call for completely different responses.
Common questions
Will checking here put my essay in Turnitin's database?
No. Documents submitted through VerifAI are processed without being added to Turnitin's student paper repository. That is the entire reason this service exists — if you ran your draft through your university's own Turnitin link, the draft itself would be stored and could then be matched against your final submission.
Is this the same score my university will see?
It is generated by the same Turnitin AI writing indicator and the same similarity engine, so it reflects what your institution's report will show for the same text. Scores can still shift if you edit the document afterwards, and institutions configure similarity exclusions (bibliography, quotes, small matches) differently, which can move the similarity percentage a few points either way.
What if my score comes back high and I wrote the essay myself?
That happens, and it does not mean you did anything wrong. The AI indicator estimates how much of the text reads as machine-generated prose; formulaic academic writing, heavily edited drafts, and writing by non-native English speakers can all raise it. Knowing the number before you submit gives you the chance to gather your drafts and version history while that evidence still exists.
Do I need a subscription?
No. Every check is a one-time payment. Multi-check bundles are available at a lower price per check if you have several assignments coming up, but nothing renews.
Know your score before your teacher does
Upload your document and see your full Turnitin AI and similarity scores in under 2 minutes.
Check My Score