Was this written
by AI?
Paste up to 500 words and see what nine AI detectors say. No signup, no card.
Nine detectors,
one verdict.
Your text goes through nine well-known detectors and comes back with one clear answer.
One verdict
AI-generated, mixed or human-written, with a score out of 100.
Nine detectors
GPTZero, Turnitin, Copyleaks, OpenAI, ZeroGPT, Writer, Sapling, Content at Scale and Crossplag.
AI, human or mixed
How much of the text each detector reads as AI, human or mixed.
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Questions,
answered.
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Request a demoAn AI content detector estimates whether a piece of writing was written by a person or generated by AI. It looks at patterns in sentence structure and word choice, then shows how likely the text is to be AI-written.
Paste your text and we send it to a third-party detection service that runs it through 9 detectors: GPTZero, Turnitin, Copyleaks, OpenAI, ZeroGPT, Writer, Sapling, Content at Scale and Crossplag. You see AI, human and mixed percentages from each detector. The headline verdict uses Turnitin's numbers.
Yes. Run it without an account: 2 free uses per tool each year. Sign in for more.
Paste at least 50 characters. The detector reads the first 500 words, so for longer pieces, paste the section you care about most.
No detector is perfect. Results depend on which AI wrote the text and how much a person edited it afterwards. Very formal or technical writing, and writing by non-native English speakers, can be flagged as AI by mistake. Seeing 9 detectors side by side helps you spot when they disagree. Treat the result as one signal, not a final verdict.
Use it as a guide for editing. If your text scores as mostly AI, rework the most generic parts: add personal experience, specific examples from your work and your own opinions, vary your sentence lengths and cut filler phrases. The goal is better writing, not tricking detectors. Content that reflects real experience usually works better for readers too.
No. It scores the text as a whole. It doesn't highlight individual sentences or name the AI tool that wrote the text.
Look at what might have triggered it. Formal writing, repetitive structures and limited vocabulary are common causes. Adding your own voice and varying your sentences often helps. If you need to show your work is your own, keep your drafts, notes and version history.
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