Nano Banana AI Watermark Info: What May Travel with an Image
Watermark can mean a visible logo, an invisible signal such as SynthID, or provenance metadata such as Content Credentials. These layers are different. Google's current Gemini documentation says images generated through its Nano Banana API models include SynthID, while visible watermark controls vary by product and account. An independent tool must describe its own provider and output behavior separately.
Reviewed August 27, 2026
Three provenance layers
- Visible watermark: a logo or overlay you can see on the media.
- SynthID: an invisible signal embedded in media generated or edited by supported Google AI systems.
- Content Credentials: provenance metadata that can describe origin and editing history.
- A missing visible logo does not prove that an image has no invisible watermark or provenance signal.
Visible and invisible watermarks are not the same
A visible watermark changes the displayed image. An invisible watermark is designed to support later verification without functioning as a visible logo. Turning off a visible mark in a product that offers that setting does not necessarily remove SynthID or Content Credentials.
Google's Gemini Apps help explains that visible watermark settings are product- and account-dependent. It also states that SynthID remains separate from the visible setting.
API-generated Nano Banana images include SynthID
Google's current Nano Banana image generation documentation states that all generated images include a SynthID watermark. Developers should treat that provenance behavior as part of the model output rather than promising watermark-free media.
Provider behavior can change, so keep a link to the current documentation in production notes. If an application transforms or re-encodes output, do not make unsupported claims about detectability after processing.
Do not market removal or evasion
This guide is about transparency, not bypassing provenance. Cropping a visible corner mark and deliberately defeating an invisible signal are different actions, and either may conflict with product terms, disclosure duties, or the context in which the media will be used.
Keep the original output, model name, prompt, date, and any human edits. Add your own disclosure when a platform, client, campaign, or law requires one.
Check the actual provider in Try Nano Banana
Try Nano Banana is independent and may expose models from configured providers. The selected provider determines the output's watermark and provenance behavior. Do not assume every image uses Google's SynthID unless the disclosed model and provider support that conclusion.
Before publishing, inspect the output visually, retain provenance information, and consult the active provider terms. This site does not certify that an image is watermark-free.
Nano Banana watermark questions
Do Nano Banana API images contain a watermark?
Google's current official image generation documentation states that all images generated by its Nano Banana API models include SynthID, an invisible watermark.
Can an image have SynthID without a visible logo?
Yes. Visible watermarks and SynthID are separate. A product may allow a visible mark to be changed while retaining invisible provenance signals.
Does every image from Try Nano Banana contain SynthID?
Do not assume so. This independent workspace can use different configured providers. Check the selected model and provider; watermark behavior follows that provider's current system and terms.
Publish with better context
Official references
Check the provider before publishing
Open the editor, record the selected model, and keep the original output and generation details with your review notes.
Try Nano Banana is an independent third-party service. It is not affiliated with, sponsored by, or endorsed by Google. Google, Gemini, Nano Banana, and related model names are trademarks of their respective owners. Available models, free access, credits, and usage rules can change; review the current workspace and plan terms before submitting.