About
About Watermark Eraser
Watermark Eraser is a small, independent set of free browser tools. They do two jobs: remove the visible watermark from Gemini images and videos you made yourself, and remove private metadata such as location and serial numbers from photos. We are not affiliated with Google.
Why there is nothing to upload to
This site is a set of static files served from a content delivery network. There is no application server behind it: no address that accepts a file, no database, no storage bucket. When you open a tool, your browser downloads our code, and that code does the work on your device.
Some things do travel over the network, and we would rather list them than pretend otherwise: the page itself, its styles and fonts, the example images, and Google Analytics once the page has loaded. Every one of those is a download to you, or a small page-view report. None of them contains your files.
Check it yourself: the offline test
This is the quickest check, and it needs no technical knowledge.
- Open any tool on this site and let the page finish loading.
- Wait a few seconds. The processing code is fetched in the background once the page is idle.
- Turn off Wi-Fi and mobile data, or set your browser’s developer tools to Offline.
- Drop in an image, a video or a photo and download the result. It works, because nothing needed to leave your device.
If you switch off the connection in the first second or two, the processing code may not have arrived yet. Reload, wait a moment, and try again.
Check it yourself: watch the network
The offline test shows the tool does not need a connection. This one shows that it does not use one while your file is being processed.
- Open your browser’s developer tools (F12, or Cmd + Option + I on a Mac) and choose the Network tab.
- Clear the list, then process a file.
- Look at every request that appears. A request carrying your file would be roughly as large as the file itself, sent from your browser to a server. You will not find one.
Any request you do see goes the other way, such as code or an example image being downloaded, or is a small analytics report that contains no file data. Your browser maker explains the network panel: Chrome and Edge, Firefox and Safari.
What each tool does with your file
- Gemini images: decoded, cleaned and saved as a new PNG in a background thread of your browser.
- Gemini videos: decoded and re-encoded frame by frame with your browser’s own video codecs, then saved as MP4. Video has to be re-encoded, so the result is high quality but not lossless.
- Photo metadata: the file is read as bytes, the metadata segments are cut out, and the image data is copied across unchanged.
Nothing you process is kept after you close or reload the page. The watermark removal is based on an open-source engine, published on GitHub under the MIT licence, so the method is open to inspection. Our licences page credits it and every other library we use.
What these checks do not cover
The tests above prove that your files stay on your device. They say nothing about the ordinary page visit: like any website, our host sees connection details such as your IP address, and Google Analytics records which pages you open. The privacy policy sets out exactly what is collected.
The watermark tools remove only the visible corner mark. Google also embeds SynthID, an invisible watermark, and we make no attempt to detect or remove it. The tools are for content you created or have the right to edit; the acceptable use policy has the details.
Contact
Questions, bug reports and corrections are welcome at hello@watermarkeraser.net. If you find a case where a file leaves your device, we want to hear about it first.