Google already uses SynthID to watermark pictures created with its Imagen image generation tool. However, it has now added the feature to pictures, AI-generated or not, that users have edited with Reimagine. Reimagine is currently available only on the Pixel 9 series and newer, but all devices can read the SynthID watermarks.

Google Photos now embeds an invisible SynthID watermark into AI-edited images using Magic Editors Reimagine feature. Here’s how it works and why it matters.