Google opens SynthID detector to the public, says more than 180 billion items carry its watermark

Google has opened public access to its SynthID AI watermark detection tool, allowing anyone to check whether an image, video, or audio file was generated by Google AI or by partner systems tied to the SynthID framework. Google said the partner list includes companies such as OpenAI and NVIDIA. The release gives broader access to a tool that had previously been limited, but its scope remains narrow: it can only identify media that contains a SynthID watermark, rather than all AI-generated content. Google also disclosed the scale of adoption for the watermarking system, saying that more than 180 billion images and videos have already been marked with SynthID. That figure points to wide deployment across supported media, though the company did not say that the detector can recognize every form of synthetic media on the market. The report was cited by The Decoder.