Google SynthID Detector is now available globally in English, giving users a new way to check whether an image, video or audio file contains Google’s SynthID watermark. Google says the expanded detector can also check AI-generated media from supported partners, including OpenAI, NVIDIA and Kakao, with Apple support coming soon. cite_marker
What Is Google SynthID Detector?
SynthID is Google’s technology for adding invisible digital watermarks to AI-generated content. The watermark is designed to remain imperceptible to people while allowing compatible detection systems to identify it.
Google DeepMind says SynthID can be embedded into images, video, audio and text generated or altered with supported AI systems. The company says more than 180 billion images and videos and 240,000 years of audio have been watermarked to date.
The new public detector expands the earlier 2025 verification portal from a professional testing environment to broader public access. cite_marker
How to Check AI Content With SynthID Detector
- Open the SynthID Detector portal.
- Upload a supported image, video or audio file.
- Let the service analyze the file for a compatible SynthID watermark.
- Review the result and any information about detected AI-generated content.
The detector is designed to help with verification when you suspect that media may have been produced with a supported AI system. Google also provides SynthID-related verification features through products such as Gemini, Search and Chrome. cite_marker
Which AI Tools Can SynthID Detector Check?
Google says the expanded detector can identify content made with Google AI and supported partner systems. The announcement specifically names OpenAI, NVIDIA and Kakao, while saying Apple support is coming soon.
This broader partner approach is important because AI-generated media is no longer produced by one company or one model family. A common verification layer can make it easier for publishers, journalists and ordinary users to investigate suspicious media.
What SynthID Detector Cannot Tell You
- It is not a universal AI detector: content created without a compatible SynthID watermark may not be identified.
- A result needs context: detection can indicate the presence of a watermark, but it does not automatically tell you whether a piece of content is trustworthy.
- Edited media can be complicated: transformations or changes may affect what a detector can determine.
- Not every AI tool uses SynthID: the technology is expanding across partners, but it is not a universal standard for every generator.
For this reason, SynthID is best treated as one verification signal rather than proof that every piece of online media is either human-made or AI-made.
Why SynthID Matters in 2026
AI-generated images, video and audio are becoming easier to create and harder to distinguish from ordinary media. Invisible watermarking gives platforms and users a way to add provenance information without placing a visible label across the content.
Google says its built-in verification features in Search, Gemini and Chrome now handle more than one million requests per day. The public SynthID Detector adds another option for people who need to investigate a media file directly. cite_marker
SynthID Detector vs Traditional AI Detection
| Method | What it looks for | Main limitation |
|---|---|---|
| SynthID Detector | Compatible invisible watermark | Only works where compatible watermarking is present |
| AI-content classifier | Patterns associated with AI generation | Can produce false positives or negatives |
| Human/source verification | Origin, creator and supporting evidence | Can require more time and investigation |
Who Should Use Google SynthID Detector?
The tool is particularly useful for journalists, publishers, researchers, educators, social-media users and anyone investigating the origin of suspicious media. It can also be useful when you receive an image or video and want another signal before sharing it.
For everyday users, the most important rule is simple: use SynthID as evidence, not as a final verdict about whether content is true.
FAQ
Is Google SynthID Detector free?
Google has expanded the detector to public access globally in English. Check the current detector page for the latest access requirements and usage limits.
Can SynthID detect every AI-generated image?
No. It is designed to detect compatible SynthID watermarks, so it cannot guarantee detection of content made by AI systems that do not use a compatible watermark.
Does SynthID work with video and audio?
Yes. Google says the expanded detector supports checking images, video and audio for compatible SynthID watermarks.
Is SynthID visible to people?
No. SynthID watermarks are designed to be imperceptible while remaining detectable by compatible technology.
Try AI Content Verification
Use the official SynthID resources when you need to investigate whether supported AI-generated media contains a watermark.