Google SynthID Detector Content Check

Google SynthID Detector: How to Check AI-Generated Images, Videos and Audio

Google SynthID Detector: AI-generated images, videos and audio are becoming harder to distinguish from real content. 

        To make this easier, Google has now expanded its SynthID Detector so that people can check supported AI-generated media for invisible SynthID watermarks.

        Google DeepMind announced the wider availability of the tool on October 7, 2026. The detector is now available globally in English and can check images, videos and audio created using Google AI and participating partner technologies.

        But what exactly is SynthID, how does the detector work, and can it identify every AI-generated image or video? Here is everything you need to know.

What is Google SynthID?

SynthID is Google's digital watermarking technology for AI-generated content.

        Unlike a normal watermark that can be seen on an image or video, SynthID creates an invisible digital signal inside AI-generated content. This signal is designed to remain detectable even after some common changes such as cropping, filtering, resizing or compression.

Google has developed SynthID for different types of generative AI content, including:

• Images
• Videos
• Audio
• AI-generated text

        The technology is designed to help people understand whether certain content was created or altered using supported AI tools.

Google SynthID Detector is Now Available to Everyone

        Google initially introduced the SynthID Detector in 2025 for journalists, media professionals and researchers.

        Now, Google has expanded access to the detector so that people around the world can use it in English. The latest version can check supported content from Google and several partner AI companies.

        Google says the current ecosystem includes partners such as OpenAI, NVIDIA and Kakao, with Apple support expected in the future.

        Google also says that its SynthID technology has already been used to watermark more than 180 billion images and videos and 240,000 years of audio content.

How Does SynthID Work?

The basic idea behind SynthID is simple.

        When supported AI systems generate content, SynthID can add an invisible watermark to that content.

        For example, in an AI-generated image, the watermark is embedded into the image itself. In video, the watermark can be added across video content, while audio can contain an inaudible watermark.

        People normally cannot see or hear these watermarks, but compatible detection technology can look for them.

This gives users another way to investigate the origin of digital content that they find online.

How to Check an AI-Generated Image or Video With SynthID

        Users can use the SynthID Detector to check supported media.

The basic process is:

1.   Open the SynthID Detector website.

2.   Upload the supported image, video or audio file.

3.   Let the tool scan the content.

4.   Check whether a SynthID watermark is detected.

5.   Read the result provided by the detector.

The result can indicate whether a supported SynthID watermark is present.

Official SynthID Detector: SynthID Detector

Google has also integrated SynthID verification into products such as Gemini, Search and Chrome for supported content.

Can SynthID Detect Every AI-Generated Image?

No. This is an important point.

SynthID should not be treated as a universal AI detector.

        The detector looks for SynthID watermarks from supported systems. If an image was created using an AI system that does not use SynthID, the tool may not identify it as AI-generated.

        This means a result showing no SynthID watermark does not automatically prove that an image is real or human-created.

There are also other AI content provenance and watermarking systems used across the industry.

Why Is Google Launching This Tool?

The growth of generative AI has made it easier to create realistic images, videos and audio.

        At the same time, it has become more difficult for ordinary users to understand where some online content came from.

Google says its verification tools are intended to provide people with more context about digital media and help them make more informed decisions about what they see online.

This could be useful for:

• Journalists
• Students and researchers
• Content creators
• Social media users
• Fact-checkers
• News organisations
• Anyone investigating the origin of digital media

What About ChatGPT Images?

This is one of the interesting changes in the latest SynthID Detector.

        Google says the expanded detector can identify SynthID watermarks from participating partners, including OpenAI, NVIDIA and Kakao.

        OpenAI has also explained that it uses SynthID watermarking for supported images and has been working on content provenance alongside technologies such as C2PA.

However, users should still check the exact result and remember that not every piece of AI-generated content necessarily carries a SynthID watermark.

Is SynthID the Same as an AI Detector?

Not exactly.

        A traditional AI detector may try to estimate whether something looks AI-generated based on patterns in the content.

SynthID works differently. It is primarily looking for a specific invisible watermark or provenance signal associated with supported AI-generated content.

        That is why SynthID can be useful for verification, but it should not be treated as a tool that can identify every AI-created file on the internet.

Google SynthID Detector: Important Limitations

Before relying on the result, users should understand a few limitations.

1. It does not cover every AI tool

        Only supported SynthID watermarks can be detected.

2. No watermark does not mean "definitely real"

        A file without a detected SynthID watermark could still have been generated or edited using another AI system.

3. AI-edited content can be complicated

        Some content may contain a mixture of human-created and AI-generated elements. Understanding its complete origin may require additional evidence.

4. Content verification is still evolving

        Watermarking is only one part of the wider effort to establish digital content provenance. Other standards, including C2PA-based Content Credentials, are also being developed and adopted.

Why SynthID Matters in 2026

        AI-generated content is no longer limited to simple-looking pictures or obviously artificial videos. Modern generative AI can create highly realistic media.

        As this technology becomes more common, knowing where a piece of content came from can become just as important as looking at the content itself.

        SynthID is Google's attempt to make that process easier by adding an invisible signal that can later be checked by compatible tools.

        The new public detector is therefore an important step toward making AI-content verification more accessible.

Google SynthID Detector FAQs

What is Google SynthID?

        Google SynthID is an invisible digital watermarking technology designed to identify supported AI-generated or AI-altered content.

What can SynthID Detector check?

        The latest public detector can check supported images, videos and audio for SynthID watermarks.

Can SynthID detect all AI-generated content?

        No. It mainly detects supported SynthID watermarks, so it cannot be considered a universal AI detector.

Is SynthID visible on an image?

        No. The watermark is designed to be imperceptible to normal viewers.

Can ChatGPT-generated images be checked?

        Google says the expanded detector supports SynthID from participating partners, including OpenAI. However, detection depends on whether the content contains a supported SynthID watermark.

Where can I use SynthID Detector?

        The public detector is available through the official SynthID website.

Final Words

        Google's expanded SynthID Detector gives users a new way to investigate AI-generated images, videos and audio. Its biggest advantage is that it can check invisible SynthID watermarks rather than simply guessing whether something "looks like AI."

        However, users should not treat a negative result as proof that content is genuine. SynthID is a verification tool, not a universal AI detector.

        As AI-generated media continues to grow, tools such as SynthID, Content Credentials and other provenance technologies could become increasingly important for understanding the origin of online content.