DetectGPT - Detect ChatGPT Content

DetectGPT adds an AI-content check directly to your browsing workflow. Once installed, you can open the extension on any page and it will scan the visible content for signs of machine authorship, or you can copy a block of text, right-click, and choose "Scan with DetectGPT" for a targeted check. There is also a manual paste area inside the extension for quick one-off checks.

The original tool was trained to recognise output from widely used natural language models, including ChatGPT, GPT-3.5, GPT-3, GPT-J, GPT-NEO and GPT-2. Its published figures cite accuracy around 94% on raw GPT-3 output, and it openly states that detection is not perfect — false positives and missed detections are possible, so results are best read as probabilities over a larger sample rather than as proof about a single paragraph.

The extension needs no account or sign-up and is free to install, which makes it easy to drop into a quick verification routine: checking a guest post before publishing, reviewing copy submitted by a freelancer, or sanity-checking content you find while researching. Because it is a browser extension, it fits naturally into editorial and SEO workflows where content is reviewed in tabs rather than in a separate dashboard.