What is SynthID?
SynthID is a watermarking system from Google DeepMind. It adds a signal to AI-generated images, video, audio and text at the moment they are created. You cannot see it or hear it. Google says the watermark is designed to survive common changes such as cropping, filters and compression, and, for video, changes to the frame rate.
Unlike a metadata tag, the watermark is not a note stored next to the picture. It is part of the content itself, which is why saving the file again or renaming it does not take it off. Our tool does: drop the file above and it clears SynthID along with the AI tags.
Where is SynthID used?
Google adds SynthID to content from its own generative AI tools. Google also says its detector recognizes watermarks from partner companies, which it lists as OpenAI, NVIDIA and Kakao. On the Google side, SynthID is found in:
- Images made or edited in the Gemini app, and images from Google’s image models, including Imagen and Nano Banana.
- Videos made with Veo.
- Music and audio from Lyria, and the podcast-style audio from NotebookLM.
- Text written by the Gemini app and on the Gemini website.
- Photos edited with Reimagine in Google Photos Magic Editor. Google notes that some very small edits may be too small to mark.
How to check your file for SynthID
Drop the image or video into the tool above. It reads what your file carries and tells you plainly whether an AI mark is present, including SynthID when a Google AI tool is behind the file.
It takes seconds and costs nothing. You see the result before you change anything, so you decide whether to keep the file as it is or clean it.
The AI tags platforms read
Alongside SynthID, Google tools write ordinary metadata into the file: C2PA Content Credentials and IPTC fields that describe the image as AI-generated or edited with AI. This is what social apps read when they decide whether to show a label.
The tool above lists each of those tags, names the app that wrote them, and removes them. It handles the pixel watermark and the metadata tags in the same pass, so you don’t have to think about which is which.
One click removes it all
When you’re ready, hit Clean. Every AI mark your file carries comes off — SynthID in the pixels and the AI tags in the metadata — and you get a clean copy to download and post.
No sign-up, no settings to learn. One button does the whole job.
Does SynthID matter for Instagram and Facebook labels?
Meta says it reads industry-standard indicators such as C2PA and IPTC for its AI content (formerly AI info) label, and both live in the file’s metadata. Platforms can change how they check at any time and can use their own classifiers too.
Either way, a clean copy from the tool above carries neither the metadata tags nor the SynthID watermark, so there is nothing in the file left to read.
Edited your own real photo with a Google AI tool?
If you used Gemini or Magic Editor to fix a small part of a real photo — a stray object, a brighter sky — a false AI label is unfair. Drop the file above and clean it: both the SynthID watermark and the AI tags come off, and you get a clean copy to post.
One line we hold to: if an image was generated by AI from scratch, keep the disclosure when you share it. Most platforms ask for it, and so do we — this tool is for real photos wrongly flagged, not for passing off fully AI images as real.