Free Gemini Watermark Remover for Nano Banana Images
Remove Gemini Watermark
from Nano Banana Images
Remove the visible sparkle logo from Gemini and Nano Banana outputs in about 1 second.
100% browser-based, with no server upload and no sign-up.
Before
After
The Gemini watermark in the bottom-right corner is cleanly removed.
Drop images here or click to upload
PNG, JPG, WebP · Multiple files · ⌘V paste
How It Works
Upload
Drag, click, or paste your Gemini / Nano Banana generated images. Batch processing supported.
Auto Remove
The watermark is detected and removed using reverse alpha blending. Takes about 1 second.
Download
Compare before/after and download your clean image as PNG.
One Click.
Watermark Gone.
Everything happens in your browser.
No server means no data leaks.
Privacy First
Your images never leave your device. 100% client-side processing with zero network requests.
Instant Speed
No server round-trip. Results appear immediately after you upload.
Precise Restoration
Not a simple crop — reverse alpha blending mathematically recovers the original pixels beneath the watermark.
Free & Unlimited
No sign-up, no usage limits. Use as much as you need.
What Is the Gemini Watermark?
The Gemini watermark is a semi-transparent sparkle (✦) logo automatically added to the bottom-right corner of every image generated by Google Gemini AI. It appears on images created with both Nano Banana and Nano Banana 2 models, and can be removed using reverse alpha blending.
Nano Banana is Google DeepMind's AI image generation model, available through Gemini and Google AI Studio. Its successor, Nano Banana 2 (Imagen 3), produces higher quality images but uses the same watermark system.
Free and Pro users' generated images include a semi-transparent Gemini sparkle (✦) logo in the bottom-right corner. This is the visible watermark that this tool removes.
Separately, all AI-generated images contain SynthID, an invisible digital watermark developed by Google DeepMind. SynthID is not affected by this tool. Learn more about how to remove the Gemini watermark →
Watermark Specifications
- Images ≤ 1024px — 48×48px logo, 32px margin from bottom-right
- Images > 1024px — 96×96px logo, 64px margin from bottom-right
How It Works: Reverse Alpha Blending
Reverse alpha blending is a mathematical technique that recovers the original pixels beneath a semi-transparent watermark by inverting the compositing formula. Unlike AI inpainting, it produces an exact reconstruction — not an estimate.
Gemini composites the watermark onto images using alpha blending:
By reversing this formula, we can recover the original pixels:
NCC (Normalized Cross-Correlation) locates the exact watermark position, then the reverse formula is applied to each RGB channel. Edge alpha values are carefully handled for seamless results. Compare this with other removal methods →
Blog
We publish explainers about visible AI watermarks, image models, and practical workflows for real content operations.
구글 Imagen3 ,나노바나나 완벽 가이드
Imagen 3는 Google DeepMind가 만든 텍스트-투-이미지 모델입니다. Gemini 앱에서 "나노바나나"라고 부르는 이미지 생성 기능이 초기에 이 Imagen 3를 기반으로 만들어졌고, 이후 나노바나나 프로·나노바나나2 등으로 확장되며...
Read article →Working with Watermarked AI Images
Most quality loss happens because teams edit in the wrong order. A simple sequence is often enough to avoid rework.
Read article →7 Checks Before You Choose an AI Image Model
A strong model is not just the one that makes one beautiful image. It is the one that supports your workflow repeatedly without expensive cleanup.
Read article →Frequently Asked Questions
What is the Gemini watermark?
It's the sparkle (✦) logo automatically added to images generated by Google Gemini AI (Nano Banana / Nano Banana 2). It appears semi-transparently in the bottom-right corner. Ultra subscribers and AI Studio users may not see it.
Can I remove Nano Banana 2 watermarks too?
Yes. Nano Banana 2 (Imagen 3) uses the same Gemini sparkle logo, so this tool works for both Nano Banana and Nano Banana 2 images.
Is it legal to remove AI watermarks?
Removing the visible watermark from your own AI-generated images is generally not illegal. However, removing watermarks from others' copyrighted works may violate copyright law.
Are my images uploaded to a server?
No. All processing happens in your browser via the Canvas API. Your image data never leaves your device.
Does this remove SynthID?
No. This tool only removes the visible Gemini logo. The invisible SynthID watermark is preserved.
What formats are supported?
PNG, JPG, and WebP. Results are downloaded as lossless PNG. Batch upload is supported for processing multiple images at once.
Does it work on mobile?
Yes. It works in all modern browsers — Chrome, Safari, Firefox, and Edge — with no installation required.
How accurate is the removal?
Reverse alpha blending mathematically inverts the compositing process, so theoretically perfect restoration is possible. JPEG-compressed images may have minor artifacts; we recommend using PNG originals.