Nano Banana Watermark: What It Is and How to Remove It

Last updated: 12 June 2026

If you have generated images with Google's latest image model and noticed a small four-point star tucked into the bottom corner, you have met the "Nano Banana" watermark. This guide explains what it is, why it appears, and how to take it off cleanly when you own the image.

What is the Nano Banana watermark?

"Nano Banana" is the nickname that spread online for Google's Gemini image model. The watermark itself is the same small star (sparkle) logo Gemini stamps onto the images it creates. It usually sits in a bottom corner and is added at a fixed size and position depending on the output resolution.

So "Nano Banana watermark" and "Gemini watermark" refer to the same thing: the visible star logo on AI-generated images. It is not part of your picture — it is a layer added on top after the image is created.

Why does the watermark appear?

Google adds the visible star to signal that an image was generated by AI. It is a transparency feature, not a sign of ownership over your specific creation. The mark is applied the same way every time, which is exactly why it can be removed precisely rather than guessed at.

How to remove the Nano Banana watermark

Because the star is blended onto the image in a known, predictable way, the blend can be reversed mathematically to restore the original pixels underneath. This is very different from "AI inpainting" tools that paint over the area and often leave a smudge.

1. Open the tool. Go to the Gemini watermark remover in any browser. There is nothing to install.
2. Add your image. Drag and drop it, click to browse, or paste it from your clipboard. You can drop several at once.
3. Download the clean result. The star is removed instantly and you get a clean PNG. If no watermark is detected, your image is left completely untouched.

Everything happens inside your browser, so your images are never uploaded to a server. For the full walkthrough, see the complete step-by-step guide.

Does removing it lower the quality?

No. On an image at its original output size, reversing the blend restores the exact original pixels, so there is no quality loss. If your file was resized after download, the tool automatically calibrates and still produces a clean result.

What about the invisible watermark?

Removing the visible star does not touch SynthID, the invisible signal Google embeds across the whole image. That is a separate technology — you can read more in what is SynthID. This tool only removes the visible logo on images you created yourself.

Try it now

Ready to clean up your image? Open the watermark remover and drop your file in. It is free, private and takes about ten seconds.

← Back to the blog