How to use Google's SynthID AI detection website

EngadgetOct 18, 2026Oct 18, 2026, 1:30 PM AST

Google's SynthID hides an imperceptible watermark in images, video and audio made by Gemini, and its new Detector scans a file for that signal. Upload a file to SynthID.com and it returns a yes or no, though it only finds watermarks from Google and partners such as OpenAI and Nvidia, not every AI model. Users get about 10 checks a day to stop people probing how to remove the mark.

Summary written with AI by HowTechMoves, based on reporting by Engadget.

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