Google opens its SynthID detector to everyone, adds partner watermarks

Google has spent years stamping invisible watermarks on everything its Gemini models produce. Now it is letting the rest of us check for them. The company announced that its SynthID detector is available to anyone through a new dedicated website. It now recognizes watermarks from every partner using the technology, not just Google’s own. What changed with the SynthID detector SynthID works by hiding a signal inside the content itself. For images and video, the marker lives in the pixels. For audio, it is woven into the waveform. The scale is large. Google says Gemini alone has applied SynthID to over 100 billion images and videos, along with 60,000 years of audio. Until this update, people outside Google faced a clunky process to confirm whether a file carried a SynthID tag. The new site removes that friction. You bring the file, the detector looks for the hidden signal, and the answer no longer depends on which partner’s model made the content. That partner coverage matters. SynthID has picked up support from several major AI companies, including OpenAI, ElevenLabs, Kakao, and Nvidia. How SynthID got here Google DeepMind launched SynthID in 2023. It started as an image watermark a...