CheckerAIStudents checking a draft
Run your own draft through the ChatGPT detector before you submit it. If a passage is highlighted, reread it and be ready to explain your examples, sources, and wording.
Free ChatGPT Detector
Paste text or upload a file to check whether it was written by ChatGPT. No sign-up needed.
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PDF, Word or text files · Up to 20 MB
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How to check if text was written by ChatGPT
Use the ChatGPT detector above. You can paste text or upload a file, and no account is needed.
1. Add your text
Paste your writing, or upload a PDF, Word (.docx), TXT, or Markdown file. Each file can be up to 20 MB. Not sure what a result looks like? Select "Try a ChatGPT sample" first.
2. Run the check
Select Detect AI. Longer documents are checked in sections, and the overall score appears when every section is finished.
3. Read the highlights
View the score, then read any passages highlighted in your original text.
Common signs of ChatGPT writing
ChatGPT writes fluent, well-organized text, but it often leaves recognizable patterns. These are common signs, not proof. People write this way too, and edited AI text may show none of them.
Generic openings.
Phrases like "In today's fast-paced world" or "In the ever-evolving landscape of…" set up a topic without saying anything specific.
Predictable transitions.
"Moreover," "Additionally," "Furthermore," and "In conclusion" appear at the start of paragraph after paragraph.
Even, balanced structure.
Paragraphs of similar length, lists of exactly three points, and a neat summary at the end, whatever the topic.
Confident but vague claims.
Statements such as "studies show" or "experts agree" with no source, name, or date.
Few personal details.
Little first-hand experience, few concrete examples, and few real opinions.
Repeated phrasing.
The same idea restated in slightly different words, often to reach a target length.
If you spot several of these in a draft, run it through the ChatGPT checker above and look closely at the highlighted passages. A detector looks at patterns across the whole text, so it can catch writing that seems natural to a human reader. It can also flag human writing that happens to share these habits.
What your ChatGPT detector result means
Highlighted passages were flagged by the ChatGPT detector as potentially AI-written. They stay inside your original text, so you can read the surrounding sentences.
The score shows how closely the text resembles AI writing. It's an estimate, not proof that ChatGPT wrote the document or any particular sentence. Highlights point to passages worth rereading; they don't give each sentence its own score.
Human writing can be flagged, and AI text can slip through, especially after editing. Use the result to decide what to reread, not to make a final call on a grade, a hire, or a publication.
Who uses the ChatGPT detector
Teachers reviewing student work
Flagged passages can help you choose what to discuss with a student. Ask about their drafts and sources before you decide what the result means.
Editors before publication
Before you publish, put the draft through the ChatGPT detector and read highlighted sections next to the sources the writer cites.
Content teams
Check reports, articles, or product copy before the next editing round. Share the highlighted passages and your questions with the writer.
ChatGPT vs other AI models
ChatGPT is a common source of AI-written text, but it's not the only one. This ChatGPT detector also checks text written with GPT-5, GPT-6, Claude, Gemini, and other writing tools. Results can vary between tools and versions, and the detector can't tell you which model was used. To check text from any model, you can also use our AI detector.
Questions about the ChatGPT detector
Is the ChatGPT detector free?
Yes, this ChatGPT checker is free. You don't need an account or a subscription. If the page asks you to wait, just try again a bit later.
Do I need to sign up?
No. Just paste your text or upload a file and run the check right here.
Can it detect GPT-6 and other newer models?
Yes. You can check text from ChatGPT, GPT-5, GPT-6, Claude, Gemini, and other writing tools. Results can vary from model to model, and the detector can't reliably tell you which one was used.
Can I upload a PDF or Word file?
Yes. PDF, Word (.docx), TXT, and Markdown files up to 20 MB are supported, and you can paste text instead. Review the extracted PDF or Word text before you start the check. A scanned PDF with no selectable text may not produce readable text.
How accurate is it?
No AI detector gets every text right. We haven't published an independent accuracy test, so we won't promise a success rate. Human writing can be flagged and AI text can be missed, so treat the score as a starting point, not a verdict.
Is my text stored?
We don't publish your text or keep a history of your checks. Results only stay on this page, so they're gone if you reload or leave. To run a check, we send your text to an outside detection service. Uploaded PDF and Word files go to temporary storage set to expire after one day, though deletion can take longer, and outside services may keep their own copies. See the Privacy Policy for details.
Can ChatGPT tell if it wrote something?
Not reliably. ChatGPT can't see what it wrote for other people, so asking it "Did you write this?" just gets you a guess. OpenAI also shut down its own AI text classifier in 2023 because it wasn't accurate enough.
Can teachers tell if you used ChatGPT?
Sometimes. Teachers often notice when an essay doesn't sound like a student's earlier work, skips details from class, or uses very generic phrasing. Many also run assignments through a ChatGPT detector. No detector is proof on its own, so a fair review also looks at drafts, notes, and a talk with the student.
Can Turnitin detect ChatGPT?
Turnitin has its own AI writing check, and whether you see it depends on your school's setup. We're not connected to Turnitin, so we can't show you what it will report. You can still run a check here to see which parts of your text read as AI-written.
What should I do if my own writing is flagged?
Reread the highlighted passages and look for the habits listed above, like generic openings or vague claims. If you wrote it, your drafts, notes, and version history are the best way to show your work. You can run the revised text through the ChatGPT detector again.