Guide
AI content marks
The machine-readable marks that identify a result as AI-generated, what removes them, and labelling AI images in the EU.
Every image the API returns is made with a generative AI model and marked as AI-generated, in a form software can read, when it is generated. This page describes those marks and which results keep them.
The marks
| Mark | What it is | Results that carry it |
|---|---|---|
| SynthID | Google's invisible watermark, embedded in the pixels. | Added to every result when it is generated. |
| C2PA Content Credentials | A manifest in the file's metadata, signed by Google, recording that the image was created with generative AI. | Results stored exactly as the model returned them — see below. |
Which results carry Content Credentials
A result is stored exactly as the model returned it, so it keeps Google's signed Content Credentials alongside SynthID — except in three cases, where Roomagen writes the result as a new file and its Content Credentials are not carried over:
- A render that carries the Roomagen watermark, made while the account has no paid pack — see Free images.
- A result of
image-enhancement,hdr-enhancement,color-correction,lighting-adjustment,noise-reduction,lens-correction,perspective-correction,image-upscaling,4k-upscaleoraerial-photo-editingthat came back smaller than the photo you sent and was scaled up to its size. - A
floor-plan-colorizeresult whose plan was padded to a supported shape before rendering and cropped back to the plan's own frame afterwards.
What removes them
Content Credentials live in the file's metadata. Most tools remove them when they re-encode, resize or edit the file — an image editor, a CMS that recompresses uploads, your own pipeline — and adding or changing metadata without re-encoding makes them fail validation.
SynthID is part of the pixels and is designed to survive common edits.
Do not deliberately remove or alter these marks. Where you can, store and serve results as the API returns them; if your pipeline has to resize or recompress a result, keep the original file as well.
Publishing AI images in the EU
If you publish images generated or modified with AI in the European Union — virtually staged listing photos, for example, or a room shown emptied or renovated — Article 50(4) of the EU AI Act may require you to disclose that visibly to the people who see them. That disclosure is the publisher's responsibility. The marks on this page are machine-readable and invisible to people looking at the image, so a visible disclosure is a separate step.
The regulation: Regulation (EU) 2024/1689 (AI Act). This is not legal advice.
Next step
Pricing & credits — image packs, the free images and their watermark.