Google is opening SynthID Detector to the public worldwide today, with English as the available language. The tool lets people check images, videos and audio files for content generated by AI systems from Google and participating partners.
Google names NVIDIA, OpenAI and Kakao among the supported partners, with Apple due to join soon.
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The expansion follows an early version Google introduced last year for media professionals. Google launched SynthID in 2023 to mark AI media with watermarks people cannot perceive, spanning still images, video and sound.
Google says it has applied those watermarks to more than 180 billion images and videos, plus audio totaling 240,000 years. The detector supplements verification functions already offered through Chrome, Search and the Gemini app, which Google says regularly process more than 1 million requests a day.
In August, Google began rolling out a setting that allowed Gemini and Flow users to turn visible watermarks off, except where laws required them. That change retained invisible SynthID markers and embedded C2PA metadata, preserving ways to check AI origins even when the visible mark was removed.
