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Google has opened its SynthID Detector to users globally in English, expanding a tool previously offered in an early version to media professionals. Google says it can check images, video and audio for SynthID watermarks from Google and participating partners; it does not establish that every AI-generated file can be identified.
Google has opened its SynthID Detector to people worldwide in English, making a tool previously available in an early version to media professionals accessible to the general public. The detector checks images, video and audio for SynthID watermarks associated with AI content from Google and participating partners, but its scope does not cover every AI-generated file.
Google said users can submit an image, video or audio file to check whether it was made with AI from Google or its partners. The company named OpenAI, NVIDIA and Kakao as partners, and said support for Apple is coming soon. The announcement does not specify when Apple support will arrive.
Google described SynthID as an imperceptible watermarking system for AI-generated media. It said that, since the system launched in 2023, it has watermarked more than 180 billion images and videos, as well as audio content equivalent to 240,000 years. Those figures are Google’s reported totals, not an independent assessment of the detector’s coverage or accuracy.
The company also said its existing verification features in Google Search, Gemini and Chrome now handle more than one million requests daily. It presented the public detector and those built-in features as part of a broader effort to give people more information about media encountered online.
A Wider Route to Check Media
Opening the detector to the public could make it easier for people outside newsrooms and professional media organizations to check whether supported content carries an AI watermark. That may offer useful context when users encounter images, clips or audio whose origin is uncertain, especially as generative tools become more accessible.
The usefulness of the check depends on watermark coverage: the detector is designed to find SynthID, not to identify all AI-made content regardless of how it was produced. A result that does not identify a watermark should not be treated as proof that a file is human-made. The announcement provides no performance figures that would allow readers to judge the tool’s error rates.
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SynthID’s Expansion Since 2023
Google launched SynthID in 2023 to mark AI-generated media with watermarks that are intended to be imperceptible. The approach differs from relying only on visible labels: the watermark is embedded in the media and can be checked with a compatible detector. The company says the system covers images, video and audio.
Last year, Google introduced an early version of the detector for media professionals. The current announcement expands access and names external technology partners whose AI-generated content can be checked. Google did not describe the technical arrangements with those partners or explain whether the detector can assess content made by other AI systems.
““With the new SynthID Detector, anyone can easily check if an image, video, or audio file was made with AI from Google or our partners.””
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Coverage and Accuracy Still Open
Google’s announcement does not provide independent testing, accuracy rates or details about how the detector handles edited, compressed or otherwise altered files. It also does not say whether a negative result means a file lacks SynthID, or how clearly the tool communicates that distinction to users.
The detector is described as checking for watermarks from Google and named partners, so it should not be read as a universal AI-content detector. The availability of partner support may also vary by system or content type; the announcement gives no partner-by-partner coverage details. Apple support is described as coming soon, without a release date.
video authenticity verification tool
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Broader Access and Partner Support
The immediate change is public access to SynthID Detector worldwide in English. Google has not announced additional languages or a timetable for them. It has also not given a date for Apple support, so users will need to wait for further information on that expansion.
Google says the detector complements verification features in Search, Gemini and Chrome, which it reports handle more than one million requests daily. Further details on supported formats, partner coverage and the detector’s performance would help users understand when its results can provide useful evidence—and when a file’s origin remains unknown.
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Key Questions
Who can use Google’s SynthID Detector now?
Google says the detector is available to everyone worldwide in English, expanding access beyond the media professionals who could use its earlier version.
What kinds of files can it check?
The tool checks images, video and audio for SynthID watermarks, according to Google.
Does it detect all AI-generated content?
No such broad capability is stated. Google describes checks for SynthID watermarks associated with its own AI content and participating partners. Content without a detected watermark cannot automatically be assumed to be human-made.
Which partners are named?
Google named OpenAI, NVIDIA and Kakao as partners and said Apple support is coming soon. It did not provide a date for Apple’s addition.
How accurate is the detector?
The announcement does not report independent accuracy tests, error rates or detailed performance measures. Those remain unknown from the information provided.
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