Are My Images Private When Using geminiwatermarkremover.io?

Updated

Yes. According to the site, all watermark removal runs locally in your browser, and images are never uploaded to a server. You don't need an account or sign-up, and the tool is open source under the MIT license. The privacy claim rests on browser-local processing: the page states "no upload" and "images never leave your device."

What "local processing" means here

The tool performs its pixel restoration inside your browser tab rather than sending the file to a remote server. The site describes the method as reverse alpha blending with calibrated alpha maps — it reconstructs the pixels underneath the watermark instead of repainting with an AI model. That computation happens on your machine.

This matters because the usual privacy risk in online image tools is the upload step: your file travels to someone else's server, may be stored, and may be processed by third parties. If processing truly stays in the browser, that transfer never happens.

What the site claims

Claim What it means for you
"100% local, private processing" Computation runs in your browser, not on a server
"No upload" Your image file is not sent off your device
"No sign-up" No account, email, or login required
"MIT licensed, open source" The code can be inspected independently
"5k+ GitHub Stars" A public repository exists that you can review

How to verify it yourself

You don't have to take the claim on faith. A few practical checks:

  1. Watch the network tab. Open your browser's developer tools (Network panel), load an image, and run the removal. If the image data were being uploaded, you'd see a request carrying it. Local processing shows no such upload.
  2. Disconnect and test. After the page loads, turn off your internet connection and try processing an image. If it still works, the computation is happening locally.
  3. Check the source. Because the project is open source under MIT, you can review the repository to see how files are handled.

These checks confirm the mechanism rather than just repeating the marketing line.

Where privacy still depends on you

Local processing protects the image from being uploaded by the tool, but it doesn't cover everything:

  • The page itself is still a website. Loading it involves normal web requests (scripts, styles). That's separate from your image data.
  • Browser extensions and your own device are outside the tool's control.
  • The Chrome extension / userscript runs on Gemini pages and auto-replaces previews, copies, and downloads with clean versions. It operates in your browser, consistent with the local-processing model, but you're trusting installed code — review it if that matters to you.
  • CLI & SDK runs on your own machine (pnpm dlx for zero-install or a global install), so batches and local video cleanup also stay on your device.

Bottom line

If your concern is "will my image be uploaded somewhere," the site's design answer is no: processing is browser-local, no account is needed, and the code is open source for verification. The sensible next step is to confirm it with the network-tab or offline test above, since that's the difference between a claim and something you've checked. For images you can't afford to send to a third party, a locally run tool — this one or its CLI — is the safer category than any upload-based service.