Protect Your Images for Free

A regular watermark is a visible text or logo on an image, which can be distracting. A hidden watermark (or invisible watermark or blind watermark or digital watermark) is a technology that hides information within the image data itself. It's invisible to the naked eye and doesn't spoil the picture, but it can be extracted with the right tool to prove ownership and trace its origin.

Yes, we 100% guarantee it. Our website is built on pure client-side technologies (like JavaScript and WebAssembly). All data reading, processing, and generation happens entirely within your browser's secure environment. You can verify this yourself by opening your browser's Developer Tools and monitoring the 'Network' tab—you will see zero image upload requests to our server.

Blind watermarking involves making minuscule, mathematically calculated changes to the image's pixel data. These alterations are designed to be imperceptible to the human eye. We offer a 'strength' setting to give you control, ensuring maximum protection with the highest possible fidelity.

You must keep a record of the exact watermark information (the text mark) you used. When you find a stolen copy, you can use our Watermark Extractor tool. By loading the suspected image and providing your original watermark key, the tool can verify its presence, giving you powerful digital evidence for your copyright claim.