Google has opened its SynthID Detector to everyone. Announced on October 7, 2026, the tool lets anyone check whether an image, video or audio file was made with AI tools from Google or its partners. Two days earlier, OpenAI described a new invisible watermark for AI-generated text. If you create or sell digital products with AI help, here’s what these changes mean for you.
What SynthID Detector does
SynthID is Google DeepMind’s imperceptible watermark, added to content generated by Google’s AI tools. According to Google, the detector is now available globally in English at synthid.com, after an earlier version was offered to media professionals. Google says it covers content from partners including OpenAI, NVIDIA and Kakao, with Apple listed as coming soon. Google also reports that over 180 billion images and videos have been watermarked since SynthID launched in 2023.
The key limitation: it can only detect content that carries a SynthID watermark. An image made with a tool outside that group won’t be flagged, so a “not detected” result doesn’t prove something was made by a person.
OpenAI’s text watermark, briefly
On October 5, OpenAI introduced textGrain, an invisible signal in AI-generated text. It’s rolling out for ChatGPT and Codex in the EU and is opt-in for API customers worldwide; it isn’t a default for ChatGPT users in the US. The detector is limited to approved researchers. OpenAI is candid about the limits: in its tests, replacing a quarter of the words with synonyms cut detection sharply, and a missing watermark doesn’t prove human authorship.
What this means for digital product sellers
- AI-made images are becoming easier to identify. If you sell art prints, clip art or planner covers made with Google’s image tools, assume buyers and platforms can check them.
- Disclosure is the safer default. Marketplaces such as Etsy and KDP have their own rules about AI-generated content, so check them. Detection tools make undisclosed AI content riskier, not safer.
- Detection isn’t the same as ownership. A watermark shows which tool made something, not who owns it or whether it’s allowed to be sold. Copyright questions still apply. (General information, not legal advice.)
- Check PLR you buy. If a PLR pack includes graphics, you can run them through the detector and ask the seller about their AI use and license terms.
The practical takeaway: use AI where it helps, edit meaningfully, and be upfront about it in your listings.
Sources
- Google: SynthID Detector expands access to everyone
- OpenAI: Text provenance and textGrain watermarking
Featured image: Photo: Rawpixel (CC0)