How to Remove the Nano Banana (Gemini 2.5 Flash Image) Watermark

What is the Nano Banana watermark?

Nano Banana is Google's Gemini 2.5 Flash Image model - the image generator that became famous for its speed and quality. Every image it creates includes a semi-transparent Google logo watermark in the bottom-right corner, added via standard alpha blending.

For personal projects - wallpapers, mood boards, presentations, or sharing on social media - that logo can be distracting. The good news: because the watermark is mathematically predictable (fixed position, known logo, known opacity), it can be removed losslessly without blurring or cropping.

How to remove the Nano Banana watermark (30 seconds)

1. Open the tool: visit https://holatiger.com/banana/
2. Upload: drag & drop your Nano Banana image (or multiple images for batch processing)
3. Auto-process: the reverse alpha-blending runs locally in your browser
4. Download: save the clean, watermark-free image

How it works: reverse alpha blending

The watermark is applied with the classic alpha-blend formula:

Since the logo color (white = 255), position (bottom-right) and opacity (α) are known constants, we can solve for the original pixel exactly:

This is why the result is lossless - not a blur, not a crop, not a stamp-over. The exact original pixels are mathematically recovered.

Can I remove Nano Banana watermarks in batch?

Yes. Banana processes multiple images in parallel - we've tested 50+ images in one drag. Perfect for cleaning up a whole generation session.

Frequently asked questions

Is this free?

Completely free. No signup, no limits, no watermark added back.

Does it work on other AI watermarks?

It works on any image watermarked with the Gemini / Nano Banana style semi-transparent Google logo. It also handles images from other Gemini model versions.

Will my images be uploaded to a server?

Never. All processing happens locally in your browser using WebAssembly. Your images stay on your device.