Choose a file
Use the original image, video, or audio file when possible.
An independent explainer for AI watermark detection
SynthID DetectorCheck AI-generated media.
Learn how to check supported images, videos, and audio for invisible SynthID watermarks, then understand what a detection result can and cannot tell you.
This is an independent informational resource. It does not provide Google's detection service and is not affiliated with Google or Google DeepMind.
Media signal
Signal analysis
For compatible AI content
Invisible watermark
Start here
How to check media with SynthID Detector
The public detector is hosted by Google. Use this three-step guide to prepare a file and review the result with the right expectations.
Go to synthid.comOpen the tool
Use Google’s official SynthID Detector to submit supported media.
Read the result
Treat the result as evidence about a watermark, not a universal verdict.
Supported media
What can SynthID Detector check?
SynthID is designed for compatible AI-generated content. Select a media type to see the practical question the detector can help investigate.
SynthID image detection
Check supported AI-generated images for an invisible SynthID watermark. Use the original file when possible and keep the source context with it.
Best for: AI images, artwork, and visual assets
Read with context
A detection result is one piece of evidence.
SynthID looks for a compatible watermark. It is not a complete authenticity system and it does not identify every AI-generated file.
Watermark detected
The submitted media contains evidence consistent with a detectable SynthID watermark.
Watermark not detected
The detector did not find a detectable signal. This does not prove human authorship or authenticity.
Need more context
Check the original file, source information, and other available content credentials before drawing a conclusion.
Questions answered
SynthID Detector FAQ
SynthID Detector is Google’s public tool for checking supported images, videos, and audio for invisible SynthID watermarks. It is designed to provide additional information about whether compatible AI technology may have been involved.
No. SynthID is not a universal AI detector. It looks for a specific watermarking technology, so content from unsupported AI systems may not contain a detectable SynthID watermark.
It means the detector did not find a detectable SynthID watermark in the submitted media. It does not prove that the content was made by a person, is authentic, or has never been edited.
Use the original file whenever possible and avoid unnecessary re-encoding, cropping, or compression before checking. Keep the file’s source and context available so the result can be interpreted responsibly.
No. This is an independent informational website. It does not provide Google’s detection service and is not affiliated with or endorsed by Google or Google DeepMind. Use the official link on this page to check supported media.
Next step
Ready to check a supported file?
Open Google's official SynthID Detector and review the current supported formats and usage requirements there.
Last reviewed: October 2026 · Based on publicly available information from Google.
Official source: synthid.com