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AI Detector

Detect if text was written by AI

About AI Detector

AI Detector is a free online tool that asks an AI language model (OpenAI's GPT-4o mini) to judge whether a piece of text was likely written by AI or a human, based on writing patterns like phrasing, repetition, and structure. It returns an estimated likelihood along with the model's reasoning. Because it relies on an LLM's judgment rather than a dedicated, trained classifier, it should be treated as a helpful signal rather than a definitive verdict.

How to use AI Detector

  1. 1Paste the text you want to analyze into the text box.
  2. 2Click the 'Detect AI Content' button to send it for analysis.
  3. 3Wait a moment while the AI reviews the text.
  4. 4Read the result, which includes an estimated likelihood and the reasoning behind it.

Frequently Asked Questions

Is AI Detector completely free to use?

Yes, AI Detector is free to use with no signup or subscription required.

How accurate is the detection?

Accuracy varies with text length and style, and no AI detector — including this one — is 100% reliable. Treat the result as an estimate rather than proof of authorship.

Can it tell me exactly which AI model wrote the text?

No. It can only estimate the overall likelihood that text was AI-generated; it cannot reliably attribute text to a specific model like ChatGPT or Gemini.

Is my submitted text stored or shared?

Your text is sent to OpenAI's API to generate the analysis. It is not stored on our servers or used for any other purpose.

Tips & Tricks

  • ✓For more reliable results, paste larger text samples of at least 100 words.
  • ✓Formal or technical writing tends to produce clearer results than very short or casual text.
  • ✓Treat the output as a helpful indicator, not definitive proof — human review is still recommended for high-stakes decisions.
  • ✓Try analyzing a piece of text you know is human-written to get a feel for how the tool responds.