SynthID

What It Is

SynthID is a watermarking technology developed by Google. A watermark is a kind of hidden tag added to digital content, much like a label that is not visible to the human eye but can be detected by software. SynthID can be embedded into AI-generated text, images, audio, and video so that there is a way to tell if the material came from an AI system rather than being created by a person.

Google launched the free SynthID Detector tool globally on October 7, 2026. The detector lets anyone check whether media was produced with AI from Google or from partner companies that have adopted the same technology.

Why It Matters

As AI-generated content becomes more common and harder to tell apart from human-made work, tools like SynthID aim to increase transparency. Researchers, journalists, educators, and the general public can use the detector to get a signal about the origin of digital files.

The technology has attracted attention beyond Google. Reports indicate that OpenAI and Nvidia have adopted or are integrating aspects of SynthID watermarking into their own systems.

Current State

The technology is still early, and it is not perfect. Reports have noted that the detector has occasionally produced confusing or mixed-up results when used through Google's chat interface. There are also discussions online about ways to remove or bypass the watermark, which shows that the arms race between detection and evasion is ongoing. Like any detection tool, the results it provides are signals, not proof, and should be treated as such.

Questions people ask

Who created SynthID?

Google created SynthID as a watermarking system for AI-generated content. Google also released a free detector tool that works worldwide.

What kinds of content can SynthID detect?

SynthID can embed and detect watermarks in AI-generated text, images, audio, and video. The detector checks for content made with AI from Google and partner companies.

Is SynthID completely reliable?

No. Reports have shown that the detector can sometimes give confusing or mixed-up results. There are also ongoing efforts to bypass or remove the watermark, so it should be treated as a helpful signal rather than a final answer.