How does the removal actually work?

Gemini adds its sparkle logo with plain alpha blending: out = src × (1 − a) + logo × a, with a known, calibrated alpha map. DeGemini inverts the same formula — src = (out − a × logo) / (1 − a) — pixel by pixel, so the original image is recovered exactly instead of being guessed by AI inpainting.

Are my images uploaded anywhere?

No. All processing happens locally in your browser via the Canvas API. You can disconnect from the internet after the page loads — the tool keeps working.

Which images are supported?

PNG, JPG and WebP images generated by Gemini (including Nano Banana / Imagen outputs), in any resolution. Larger images carry the 96 px sparkle watermark, smaller ones the 48 px one — DeGemini calibrates both automatically.

Is it really free and unlimited?

Yes, for single images: no sign-up, no credits, no limits, and no watermark is added back to your downloads. Batch removal (1 credit per image) and AI image generation use credits.

Does DeGemini remove SynthID?

No. SynthID is Google's invisible watermark, spread across the whole image and designed to survive edits. DeGemini only reverses the visible sparkle logo, so Google's SynthID tools can still recognise the image as AI-generated.

Does it work on iPhone and Android?

Yes. DeGemini runs in any modern mobile browser, such as Safari, Chrome, Edge or Firefox. Open degemini.app, pick an image from your photos and download the clean PNG. There is no app to install and nothing is uploaded.

Does it work with Nano Banana images?

Yes, DeGemini doubles as a Nano Banana watermark remover. Images made with the Nano Banana models in the Gemini app carry the same sparkle, in a 48 px or 96 px size depending on the image resolution, and DeGemini picks the right template automatically. If no sparkle is found, the image is left unchanged.

Will removing the watermark reduce image quality?

No. Only the pixels under the sparkle are recalculated; every other pixel is untouched, and the result is saved as a lossless PNG. On heavily compressed JPGs a faint outline can remain, because JPEG compression had already changed those pixels.

Can I remove the watermark from many images at once?

Yes. Switch to Batch mode, drop up to 100 images and download them as one ZIP. Batch removal costs 1 credit per image (100 credits cost $2.99) and still runs entirely in your browser; only the credit count is sent to our server.

Is it legal to remove the Gemini watermark?

DeGemini is an editing tool for images you created yourself. Some platforms and laws require AI-generated content to be labelled, for example in ads or news, and SynthID stays in the image either way. Don't use clean images to deceive people. This is general information, not legal advice.

Can you remove watermarks from Gemini or Veo videos?

Not yet. Video support for Veo, Flow and Gemini Omni clips is coming soon — check back in a little while.

100% local · Free · No sign-up

Gemini Watermark Remover

Erase the sparkle watermark from your Gemini and Nano Banana images — mathematically exact, not AI-guessed. Free, unlimited, and 100% local: your images never leave your browser.

Drop your Gemini image here

or drag & drop · PNG, JPG, WebP up to 30 MB

Browse image

100% local processing — images never leave your browser.

How to remove the Gemini watermark from an image

Three steps, a few seconds, and your image never leaves your device.

1
Drop in your Gemini image
Drag a PNG, JPG or WebP saved from the Gemini app, including Nano Banana images, into the box above, or tap to pick one from your photos. Files up to 30 MB work.
2
The sparkle is reversed automatically
DeGemini finds the four-pointed sparkle in the bottom-right corner, matches it against the calibrated 48 px and 96 px templates, and reverses Gemini's alpha blending pixel by pixel, usually in under a second.
3
Compare and download
Drag the before/after slider to check the corner, then download a clean PNG. Cleaning a whole folder? Switch to Batch mode: up to 100 images at 1 credit each, delivered as one ZIP.

Why DeGemini

Mathematical watermark removal, not AI inpainting.

Private by design

Every pixel is processed on your device with the Canvas API. Nothing is uploaded, stored or shared — the tool keeps working even offline.

Truly lossless

We invert Gemini's exact alpha-blending formula instead of blurring pixels away, restoring the original image with zero quality loss.

Free, unlimited

Single images are always free: no credits, no subscriptions, no sign-up, as many as you like. Credits are only needed for batch removal and AI image generation.

What is the Gemini watermark (the sparkle logo)?

Why it can be removed exactly, and what stays in the image.

Images you create in the Gemini app, including those made with Google's Nano Banana image models, carry a small white four-pointed sparkle in the bottom-right corner. Google blends the logo into the picture with partial transparency, so cropping it out costs you part of the image and painting over it leaves a smudge. You'll also see it called the Gemini logo, the Gemini sparkle or the Nano Banana watermark, and tools that strip it go by Gemini logo remover or Gemini watermark cleaner. They all mean this same mark.

The blend follows a fixed formula: watermarked = original × (1 − α) + 255 × α, where α is a known transparency map. Solve it for the original and you get original = (watermarked − 255 × α) / (1 − α). DeGemini applies exactly that to the pixels under the logo, using alpha maps calibrated for the 48 px sparkle on smaller images and the 96 px sparkle on larger ones. Nothing is invented: the pixels that were there before the logo come back.

The visible sparkle is not Gemini's only marker. Every Gemini image also carries SynthID, an invisible watermark spread through the pixels that Google's detection tools can read. DeGemini removes only the visible logo and leaves SynthID intact, so the image can still be identified as AI-generated. Label AI images wherever your platform or local rules ask you to.

Ways to remove the Gemini sparkle, compared
Method	Result	Privacy	Speed	Cost
DeGemini (reverse alpha blending)	Pixel-exact restore of the corner	100% in your browser	Under a second	Free for single images
AI inpainting / magic eraser	Guesses the hidden area; can blur or change details	Usually uploads your image	5–30 seconds	Often paid or limited
Cropping	Loses the image edge and changes the aspect ratio	Local	Instant	Free
Clone or heal tool in an editor	Depends on your skill and the background	Local	Minutes per image	Editing software

Need a new image instead?

Make or edit images that never get the sparkle in the first place.

Image to Image AI

Upload up to four photos and describe the edit: restyle, swap the background, or merge references.

AI Image Generator

Create images from a text prompt with Nano Banana 2, GPT Image 2, FLUX 2 Pro or Seedream 5 Pro.

Step-by-step guide

How to remove the Gemini watermark on desktop and phone, with tips for JPG files.

Frequently asked questions

Everything you need to know about removing the Gemini watermark.