As artificial intelligence (AI) image generators grow more sophisticated, distinguishing synthetic images from genuine ones has become one of the defining challenges of the digital age.

Google DeepMind’s SynthID is designed to leave an invisible mark at the very moment an image is created. This article explains how SynthID works, what it can and cannot do, and why it matters.

What is SynthID?

SynthID is an invisible digital watermarking and detection system developed by Google DeepMind. Rather than attaching a visible label or relying on file metadata that can be easily stripped away, SynthID embeds a signal directly into the pixels of an AI-generated image at the point of creation. The embedded watermark signals are not visible to the human eye, but can be detected by a detection system to determine whether the image came from a Google AI tool.

Image source: Google DeepMind