Google opens SynthID watermark checks to everyone, with partner coverage

Google has opened a public web portal where anyone can upload an image, video or audio file and check it for a SynthID watermark, Google's marker for AI-generated content. In its announcement thread, Google says the check works for files produced by its own tools and by partners including OpenAI, NVIDIA and Kakao, with Apple coming soon. The portal joins verification already built into Search, the Gemini app and Chrome. Intel also covers a related Google DeepMind announcement about the expansion.

Google reports having watermarked 180 billion images and videos and more than 240,000 years of audio, and handling about one million verification requests a day. Those are the company's figures. A check can only find SynthID watermarks, so by inference a file with no watermark is not shown to be human-made, since it may come from a generator that does not use SynthID.