Google announced on October 7, 2026, that SynthID Detector had opened to everyone worldwide in English. The web tool checks image, video and audio files for supported SynthID watermarks associated with AI media from Google and partners OpenAI, NVIDIA and Kakao, according to Google.
Google opened SynthID Detector to the public worldwide in English
Google said it introduced an earlier version of SynthID Detector for media professionals in 2025. The October 7 announcement extended access to everyone globally, with the tool available in English.
What SynthID Detector checks
SynthID Detector looks for supported watermarks in image, video and audio files. Google named OpenAI, NVIDIA and Kakao as partners whose AI media the tool can check.
A detected mark is a particular provenance signal: it indicates that the file carries a supported SynthID watermark. The checker is not a universal test for AI authorship, so a result without a detected mark does not establish that a person made the content.
How SynthID embeds watermarks
SynthID uses different methods for different media. Google’s explainer describes watermarks embedded in image pixels and video frames, and audio processed through a spectrogram. These are methods for embedding marks; the Detector’s announced file inputs are images, video and audio.
The explainer also discusses SynthID for text. Google’s announcement about the Detector listed image, video and audio files as inputs.
What Google said about Apple support
Google said Apple support was coming soon.
