Free AI detector
Does it read like a person,
or like ChatGPT?
Paste an essay, a cover letter or any piece of writing. GPT Nada marks every sentence as person, unsure or machine, and tells you why. It works on text from ChatGPT, Claude, Gemini, Copilot and similar tools.
Check my textFree. No account. Your text is wiped when the check finishes.
How it works
- Paste your text, or upload a Word file, PDF, text file or a photo of a page.
- A quick check runs straight away, inside your browser.
- A deeper check then runs on GPT Nada's own computer, using two separate detection models. You see a colour for every sentence: green for person, amber for unsure, red for machine.
- Read the reasons: the rhythm of your sentences, stock phrases machines lean on, and what each model thought.
What it does well
- Two opinions, not one. We say very likely machine-written only when both models agree strongly, and probably machine-written when one is certain and the other leans the same way. Otherwise we side with the writer.
- Sentence by sentence. You see which parts set it off, not just one score for the whole thing.
- Private. The deep check runs on our own computer, not a big company's cloud, and your text is wiped the moment the result is ready.
What it cannot do
- It is a strong hint, never proof. Careful, formal writing by a person can score as machine, and lightly edited machine text can pass.
- Very short pieces give it little to go on. A few paragraphs or more works best.
- Never use one score on its own to accuse anyone.
Who it is for
Students who want to see how their own writing reads before they hand it in, and teachers, lecturers and markers who want a second opinion on a piece of work.
Questions
Is the AI detector free?
Yes. There is no account and no payment. Each browser can run about ten full checks a day, so everyone gets a turn.
Can it detect ChatGPT, Claude and Gemini?
It looks for the writing patterns these tools share, so it works on text from ChatGPT, Claude, Gemini, Copilot and similar tools. No detector catches everything, and edited text is harder to judge.
Why did my own writing come out as machine?
Clear, even, formal writing can look machine-like, especially after a grammar tool has smoothed it. Look at which sentences were marked and why. A high score is a reason to look closer, not a verdict.
Do you keep my essay?
No. The quick check never leaves your browser. The deep check waits on our computer only while it runs, and is wiped as soon as the result is ready. Nothing is used to train AI.
The other free tools
Paste your text once and GPT Nada runs these too: