---
id: "2026-10-07-synthid-detector-public-launch"
url: "https://postcutoff.com/e/2026-10-07-synthid-detector-public-launch/"
as_of: "2026-10-08T23:45:00+02:00"
date: "2026-10-07"
date_precision: day
category: policy-safety
importance: 3
confidence: high
status: [Confirmed]
sources: 2
editor: Adam Bicz
human_review: null
version: "2026-10-08"
---

As of: 2026-10-08 23:45 CEST.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code). Human editor: Adam Bicz.
Canonical page: https://postcutoff.com/e/2026-10-07-synthid-detector-public-launch/

# Google opens SynthID Detector to everyone

Full title: Google opens SynthID Detector to everyone: checks images, video and audio for watermarks from Google, OpenAI, Nvidia and Kakao models

On Oct 7, 2026 Google made its improved SynthID Detector publicly available at synthid.com. Until then it was limited to journalists, media professionals and researchers. It identifies AI-generated images, video and audio carrying a SynthID watermark. These come from Google's own models and from partners OpenAI, Nvidia and Kakao, with Apple support "coming soon". Microsoft and Meta use other watermarking standards, so their content is not covered.

## Key facts
- Public launch Oct 7, 2026 at synthid.com (Ars Technica: 'now available globally'); previously a limited portal for journalists, media professionals and researchers
- Formats: images (JPG/JPEG, PNG, BMP, WEBP, AVIF, HEIC/HEIF, TIFF/TIF, GIF), video (MP4, MOV, WEBM) and audio (WAV, MP3, OGG, FLAC, AAC, M4A). TechCrunch counts 18 formats; Techmeme's summary says 20
- Detects content from Google models and products (Nano Banana, Veo, Lyria, Gemini, Flow, ProducerAI, Vids) and from SynthID partners OpenAI, Nvidia and Kakao; Apple support 'coming soon' (TechCrunch)
- Gaps: Microsoft and Meta use different watermarking standards, so their output is not covered
- Usage: SynthID verification already gets about 1 million requests a day; checks are also built into the Gemini app and Chrome (TechCrunch)

## What happened

Google turned SynthID Detector from a restricted tool into a public website. Anyone can upload media and check for the invisible
SynthID watermark. Coverage now reaches beyond Google because OpenAI, Nvidia and Kakao embed SynthID in their generators.

## Why it matters

A single public checker that covers several labs' watermarks is a step toward cross-industry provenance. Major generators still use
other schemes (Meta, Microsoft), and many open-weight models carry no watermark, so a negative result proves little.

## Your AI and this story

- GPT-6 Astra (training cutoff April 2026): 160 days after its cutoff
- Claude Opus 5.5 (training cutoff June 2026): 99 days after its cutoff
- Gemini 3.8 Flash (training cutoff March 2026): 190 days after its cutoff
- Grok 4.7 (training cutoff May 2026): 129 days after its cutoff

## Sources

1. [TechCrunch: Google's new SynthID website can identify AI-generated media](https://techcrunch.com/2026/10/07/googles-new-synthid-website-can-identify-ai-generated-media/) (techcrunch.com, press)
2. [Ars Technica: Google rolls out improved SynthID AI content detector, now available globally](https://arstechnica.com/ai/2026/10/google-rolls-out-improved-synthid-ai-content-detector-now-available-globally/) (arstechnica.com, press)

## Changes

- 2026-10-08 (filed): Created

## Related

- 2026-10-05: [OpenAI introduces textGrain text watermarking](https://postcutoff.com/e/2026-10-05-openai-textgrain-eu-text-watermarking/index.md)
- 2026-09-30: [Google DeepMind introduces SynthID Bio, watermarking for AI-designed proteins and DNA](https://postcutoff.com/e/2026-09-30-deepmind-synthid-bio/index.md)