Watermark Remover Hub is a small independent project. It exists for one job: taking the visible Gemini watermark off an image, in your own browser, without asking you to sign up for anything or hand your file to a server.
What the tool does
The homepage is the whole tool. You drop in an image, it finds the watermark in the corner, works out what the pixels underneath should have been, and lets you download the cleaned file as a PNG or a JPEG. It reads PNG, JPEG and WebP, one image at a time, up to 60 megapixels.
Everything runs in the tab you already have open. Your image is read by your own browser and is never uploaded anywhere. There is no account, no sign-up, no login, no payment and no limit on how many images you clean.
What the tool does not do
- It does not remove SynthID. That is the invisible pattern Google embeds in the pixels of generated images, and it cannot be taken out by changing how the picture looks. This tool only touches the visible sparkle logo.
- It does not invent or redraw anything. There is no AI inpainting here. Every pixel outside the watermark box is copied straight from your original file.
- It does not add a watermark of its own, and it does not keep a copy of anything you open.
How the removal is calculated
Gemini lays its logo on with ordinary alpha compositing. If
watermarked = alpha × logo + (1 − alpha) × original, then the
original is (watermarked − alpha × logo) / (1 − alpha). The logo
is white, so logo = 255, and the alpha values come from stored captures of the real
watermark. Two watermark geometries are built in, and Auto-detect scores both
against your image and keeps whichever lines up better. You can override it by hand, drag the box
on the preview, or press Auto-align.
Who runs this
Watermark Remover Hub is an independent project, run under that name. It is not a company, and it is not affiliated with, endorsed by, or connected to Google in any way. Gemini is Google's product; this site is a third-party tool that works on images you already have.
Questions, corrections, or something that looks broken — the contact page says how to reach us.