Simply stated, Watermark 3D is a unique system for embedding hidden information into an STL file without any structural changes or visual marks. The watermark can only be detected if the STL file is uploaded to Watermark 3D and with the correct password. Compare it with traditional watermarks on bank notes where the identifying patterns are only visible when the note is held against a light. As for 3D models, our watermarks are near impossible to detect or duplicate.
Free software application for watermarking STL files
Integrate hidden information into your STL files without causing any structural changes or leaving visual marks. Secure the intellectual property of your 3D models and protect them from theft.
Get Started for FREE How it WorksRobust protection
Watermark is almost impossible to detect or change
Free to use
Watermark 10 STL files per day for FREE
Easy to use
Upload STL file and watermark in a few clicks
Upload STL file
Enter watermark information
Enter watermark password
Even without a password the watermark cannot be changed or overwritten once it’s applied.
Enter your email
Accept the terms
Upload STL file
Accept the terms
How it Works

2Embed data
Enter watermark information, create a password and provide your email address.

3Apply watermark
Your file is now protected with a unique watermark which only you can access.