Google opens SynthID detector to all partner watermarks via public website

Key points

• SynthID.com lets anyone check media for SynthID watermarks, no longer requiring Gemini or trusted tester access.
• Detector now covers partners including OpenAI, Nvidia, Kakao, and Apple (soon), not only Google's own watermarks.
• Users must log in with Google, OpenAI, or Apple; the limit is reportedly about 10 image, video, or audio checks daily.
• Results are a simple yes or no, without the region highlighting of the internal tool; non-watermarked AI content goes undetected.

Why it matters for marketers: Content teams can verify whether partner-generated media carries SynthID, but cannot rely on it to catch all AI content, especially from open-weight or non-watermarked models.