Google opened SynthID Detector to public use worldwide, with the rollout reported as beginning October 7, 2026. The portal checks images, video, and audio for embedded SynthID watermarks. It looks for compatible marks, rather than classifying every file as AI-generated or human-made.
Public access reaches users worldwide
The public rollout was reported to have begun on October 7, 2026. At launch, the interface was reported as English-only.
What SynthID Detector checks
SynthID is Google’s watermarking technology: it embeds a digital signal in media that a detector can search for. The public portal checks images, video, and audio for compatible SynthID marks.
What a result means
A detected watermark can indicate that a compatible tool created or edited the media. It does not establish that the entire file was generated from scratch; a mark may relate to an AI-assisted edit.
If the detector finds no mark, that does not prove the file is human-made or authentic. The media could come from a system the detector does not support, or later changes could weaken the watermark signal.
The organizations Google names as compatible
Google names OpenAI, NVIDIA, and Kakao as compatible partners. It describes Apple as a future addition.
