Google has opened a standalone SynthID verification website to the public, turning a tool previously available to a limited group of testers into a service anyone can use. TechCrunch reported on October 7 that the site accepts uploaded images, video and audio and checks them for the invisible watermark Google uses to mark media produced by supported AI systems.

The public launch broadens a program Google first showed to selected journalists, media professionals and researchers at Google I/O last year. According to TechCrunch, the new site supports a wide range of common image formats, including JPG, PNG, WEBP, AVIF, HEIC, TIFF and GIF; video formats including MP4, MOV and WEBM; and audio formats including WAV, MP3, OGG, FLAC, AAC and M4A. That breadth makes the portal useful for more than still-image checks and reduces the need to convert files before testing them.

A scanning beam reveals a hidden geometric watermark inside a digital image.
SynthID verification looks for an embedded provenance signal rather than judging whether media appears artificial.

SynthID does not try to infer whether media looks artificial. Instead, it searches for a watermark inserted when compatible AI systems create content. TechCrunch said Google's Nano Banana, Veo and Lyria models use the technology, as do generation features in products including Gemini, Flow, ProducerAI and Vids. A positive result therefore points to a known provenance signal rather than a visual guess about whether a file seems synthetic.

The ecosystem extends beyond Google's own tools. TechCrunch reported that OpenAI, Nvidia and Kakao support SynthID, while Apple is expected to add support. OpenAI also operates a separate verification site. Wider adoption matters because a detector can only find the signals that participating systems place in their outputs; the public portal is not, by itself, a universal test for every piece of AI-generated media.

Multiple provenance signals converge on a scale while one pathway remains incomplete.
A missing watermark is not proof that media is human-made, so verification results remain one signal among several.

Google has also placed SynthID verification inside the Gemini app and Google Chrome. The company told TechCrunch that people currently make one million verification requests each day. A dedicated website may make the same basic capability easier to reach for people who do not want to begin in a chatbot or browser feature, including newsrooms and researchers handling files from outside their normal workflows.

The limits remain important. TechCrunch noted that Microsoft and Meta use their own watermarking and verification standards, and that such tools can fail to identify some content produced by the very models they are designed to track. A missing SynthID signal cannot safely prove that a file is human-made: it may come from an unsupported generator, may carry another provenance system, or may simply evade detection. The strongest use of the new site is therefore as one piece of evidence about origin, not a final verdict on authenticity.