At Google I/O 2025, the tech giant introduced SynthID Detector, a new verification portal designed to address growing concerns about AI-generated content authenticity and misinformation.
The portal allows users to upload media files to determine whether they were created using Google's AI tools. Today we're announcing SynthID Detector, a verification portal to quickly and efficiently identify AI-generated content made with Google AI. The portal provides detection capabilities across different modalities in one place and provides essential transparency in the rapidly evolving landscape of generative media.
When you upload an image, audio track, video or piece of text created using Google's AI tools, the portal will scan the media for a SynthID watermark. If a watermark is detected, the portal will highlight specific portions of the content most likely to be watermarked. For audio, the portal pinpoints specific segments where a SynthID watermark is detected, and for images, it indicates areas where a watermark is most likely.
The launch comes at a critical time. The debut of SynthID Detector comes as AI-generated media floods the web. The number of deepfake videos alone skyrocketed 550% from 2019 to 2024, according to one estimate. Per The Times, of the top 20 most-viewed posts on Facebook in the U.S. last fall, four were "obviously created by AI."
While originally focused on AI-generated imagery only, Google has since expanded SynthID to cover AI-generated text, audio and video content, including content generated by its Gemini, Imagen, Lyria and Veo models. Over 10 billion pieces of content have already been watermarked with SynthID. The technology embeds imperceptible watermarks that remain detectable even when content is modified through cropping, filtering, or compression.
To expand SynthID's ecosystem, Google has already open sourced SynthID text watermarking, so any developer can build with this technology and incorporate it into their own models. And earlier this year Google took the first step in creating an ecosystem of industry partners to expand the use of the SynthID technology: They partnered with NVIDIA to watermark videos generated by their NVIDIA Cosmos™ preview NIM microservice on build.nvidia.com. This means that more content across the web has SynthID embedded in it, not just content generated by Google.
Google is starting to roll this out to early testers today, before making it available more broadly. Journalists, media professionals and researchers can join the waitlist to gain access to the SynthID Detector. The company has also partnered with GetReal Security, a leading content verification platform, to further expand detection capabilities across the web.