Google has expanded public access to SynthID Detector, a tool that checks images, video and audio for imperceptible watermarks added by supported AI-generation systems. The company first introduced SynthID in 2023 and has gradually extended the technology across its own media models and partner platforms.
Google’s official announcement says the detector can identify supported content from Google and partners including OpenAI, Nvidia and Kakao, with Apple expected to join. The system is designed to provide evidence that a file was generated or modified by a participating AI tool. It is not a universal detector for every synthetic image, recording or video on the internet.
That limitation matters. A missing watermark does not prove that content is authentic, because unsupported models, transformed files and adversarial editing may escape detection. Google is therefore building a provenance network rather than a complete truth engine. The company has also added SynthID verification to Gemini and Chrome, increasing distribution beyond a standalone website.
For Alphabet investors, the product strengthens Google’s position in AI trust and safety. Content verification can become more valuable as regulators, advertisers, publishers and platforms demand clearer provenance. Broad partner participation also gives SynthID potential as infrastructure rather than a feature limited to Google’s own models.
The commercial impact is still indirect. Google has not disclosed revenue generated by the detector, and the feature’s value will depend on accuracy, adoption and interoperability. Its strategic benefit is the opportunity to influence the standards used to identify AI-generated media across the wider ecosystem.