SynthID detector
This page is not Google’s SynthID Detector. SynthID-Text is a watermark in word choice. Detecting it needs a classifier trained for that model’s secret configuration. We do not have Google’s key, and we do not pretend to.
Scan to list hidden characters. Your text stays in this tab.
What Google’s public detector covers
As of 2026-10-07, Google’s public SynthID Detector is described for images, video, and audio. It is not a public checker for arbitrary Gemini paragraphs on this site.
What you can still check here
You can still list hidden characters with the scanner above, then return to the AI watermark detector home page for the full character-layer tool.