Google has released an upgraded version of its SynthID AI‑content detector that can now recognize watermarks not only from its own Gemini models but also from the SynthID implementations of its partners, including OpenAI, Nvidia, Kakao, and, in the near future, Apple. The detector is accessible to anyone through a newly launched website, SynthID.com, eliminating the previous reliance on Gemini queries or internal tester tools for a simple presence check. SynthID embeds an imperceptible signal into the pixel data of AI‑generated images and videos and into the audio waveform of synthetic sound, and Google reports that Gemini alone has applied this watermark to more than 180 billion images and videos as well as to roughly 240 000 years of audio. While the web‑based checker provides only a binary yes/no result—indicating whether any supported SynthID watermark is present—it does not offer the detailed region‑level highlighting that the internal tool once gave. This expansion makes cross‑platform verification of AI‑generated media considerably easier for developers, researchers, and the general public.