Images generated with Image Playground and some photos edited with Apple Intelligence will now include a SynthID watermark. Apple announced plans to add SynthID support back in June, and the feature is live in iOS 27.2.
SynthID is a Google-created tool that identifies AI-generated content. It watermarks images and videos at the pixel level instead of adding metadata. Google says it does not affect image quality and is meant to survive cropping, filters, and compression. SynthID is used by Google, Apple, OpenAI, and others. There is no option on the iPhone for detecting SynthID watermarks, and to check for them, you need to use the SynthID Detector website. When tested, images altered with Extend and Reframe had watermarks, but Clean Up watermarking depended on the size of the edit; small edits had no watermark, while larger edits included one. Images created with Image Playground will all have the SynthID watermark.
Source: MacRumors · Summarized by HeadlinesBriefing