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Google has opened its SynthID Detector to the public worldwide in English, allowing people to check images, video and audio for watermarks associated with AI content from Google and participating partners. The company says the tool can identify media made with Google or partner systems, but the announcement does not establish that it can detect all AI-generated content.
Google has made its SynthID Detector available to the public globally in English, letting people check images, video and audio for watermarks linked to AI-generated content from Google and participating partners. The launch extends a tool first offered in an early version to media professionals, but its stated coverage is limited to content made with Google or partner systems that use the watermarking technology.
Google says users can submit an image, video or audio file to the detector to check whether it contains a SynthID watermark. The company says the tool can identify AI-made media from Google and partners named in its announcement: OpenAI, NVIDIA and Kakao. Google said support for Apple is coming soon; it did not give a date or further details about that planned addition.
The detector’s availability follows an early version introduced last year for media professionals. Google says that since SynthID launched in 2023, it has watermarked more than 180 billion images and videos and 240,000 years of audio content. Those figures describe the amount of material Google says it has watermarked, not the number of files the new public detector can inspect or verify.
Google also pointed to verification features built into Search, the Gemini app and Chrome. The company says those features now handle more than one million requests daily. The announcement does not provide a breakdown of those requests or explain how their results compare with the new detector.
A Wider Route to Check Media
Public access gives people outside newsrooms and other professional settings a way to check whether online media carries an AI-related watermark. The result may provide context when a picture, clip or recording is shared without information about how it was created. Google describes the detector as one part of its effort to help people assess media they encounter online.
The tool checks for watermarks rather than determining whether any media was made by AI. A result can only indicate whether the system detects watermark signals it is designed to recognize. Google has not said the detector identifies all AI-generated content, or that a file without a detected watermark was made by a person.
The inclusion of partner systems extends the stated coverage beyond Google’s own products, though the announcement does not list which partner models or services are supported. The tool’s coverage depends in part on where SynthID is applied and on how the detector communicates its results.
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SynthID’s Rollout Since 2023
Google launched SynthID in 2023 as a system for placing imperceptible watermarks in AI-generated images, video and audio. The company says those marks are intended to remain identifiable even when media is edited or shared, although the current announcement does not detail how the public detector handles particular forms of alteration or compression.
Last year, Google introduced an early detector for media professionals. The new announcement changes who can access it: the public can now use the tool worldwide in English, according to Google. Separately, the company says its built-in checks in Search, Gemini and Chrome are already receiving more than one million requests each day, positioning the standalone detector alongside existing verification features.
The launch is part of a broader effort by technology companies to label or watermark synthetic media. In this case, the confirmed development is specifically Google’s expansion of its own detector and its stated ability to check for SynthID signals in media from Google and named partners.
““As AI tools become better and easier to use, having clear context about the content you encounter online helps you make informed decisions about what to trust.””
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Limits of Detection Remain Unspecified
Google has not said whether the detector can identify AI-generated media that lacks a SynthID watermark, so it should not be treated as a universal AI-content detector. The announcement also does not explain how the tool reports uncertainty, what level of confidence users will see, or how it performs on altered, compressed or partially edited files.
The company has not specified which products or models from OpenAI, NVIDIA and Kakao are supported, or when Apple support will arrive. It also has not provided independent accuracy results, error rates, or details about how submitted files are handled. Those questions remain open based on the information Google released.
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Partner Coverage and Access
Google says the detector is available now worldwide in English. The company has not announced additional language availability or a schedule for it. It said Apple support is planned “soon,” without giving a launch date, leaving the timing and scope of that expansion unsettled.
Further information about supported partner systems, result explanations, file handling and performance would provide more detail about the detector’s operation. For now, the confirmed next development is the stated addition of Apple support; Google has not provided a timetable or named other planned changes.
watermark detection for images and videos
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Key Questions
What does Google’s SynthID Detector check?
It checks images, video and audio for SynthID watermarks. Google says it can identify relevant media made with Google and participating partners.
Who can use the detector?
Google says the tool is now open to everyone worldwide in English. It had previously been offered in an early version to media professionals.
Does the detector identify every AI-generated image or recording?
The announcement does not say that it does. The stated function is to check for SynthID watermarks; Google has not claimed that the tool detects every kind of AI-generated media.
Which partner systems are included?
Google named OpenAI, NVIDIA and Kakao as partners. It said Apple support is coming soon but did not provide a date or list specific supported products.
How much media has Google watermarked?
Google says that since SynthID launched in 2023, it has watermarked more than 180 billion images and videos, plus 240,000 years of audio content. These are company-reported watermarking totals, not detector accuracy figures.
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