Google has opened SynthID.com to the public, turning its previously limited detector into a single place to check images, video and audio for SynthID watermarks. Ars Technica and TechCrunch report support for marks used by Google and partners including OpenAI, Nvidia and Kakao, with Apple support expected later. Google says the detector covers media from products such as Gemini, Veo and Lyria.
The useful distinction is provenance, not universal AI detection: the site reports whether a supported watermark is present, so content from providers that use other systems—or none—can pass without a flag. Access requires a login, and Google says users receive roughly ten checks a day, a limit intended to make watermark-removal testing harder.