How to Encrypt Your First 3D Model With Secure3JS
In the last post, we looked at how platforms like Sketchfab and Meshy stop people from just downloading their 3D models and why the usual tricks (renaming a file, hiding a download button, disabling right-click) don't actually solve the problem. The real fix is making sure the browser never receives a plain, reusable .glb in the first place.
This post is the practical follow-up: how to actually do that on your own site, using Secure3JS which is a free tool that encrypts your models before they're ever hosted.
This is Part 1 of a two-part series. This post covers encrypting the model. Part 2 will cover integrating Secure3JS into an existing or new Three.js site, so your encrypted models actually render.
Watch it in action
I put together a video walking through the whole thing including a side-by-side comparison of a protected vs. unprotected site, so you can see exactly what shows up in the browser's Network tab in each case, before getting into downloading and using Secure3JS itself.
What's actually happening when you encrypt a model
The short version: your original .glb gets run through AES-256 encryption before it ever touches your server or CDN. What you host afterward isn't the model anymore it's an encrypted binary payload that means nothing on its own.
model.glb → AES-256 Encryption → Encrypted Asset → ready to host
That encrypted file is what you upload to your website or CDN in place of the original. On its own it can't be opened in Blender, loaded by a standard GLTFLoader, or used anywhere — it only becomes a usable model again when it's decrypted at runtime by Secure3JS's own loader, which is what Part 2 will cover.
For the exact steps downloading Secure3JS, running the encryption, and what the output looks like the video above walks through it directly, since it's much easier to follow visually than as a list of instructions.
Why bother encrypting at all
If you're showing off product configurators, furniture, jewelry, automotive or architectural work, game characters, or any 3D asset you don't want people walking off with for free, this is the step that actually matters. A hidden URL or disabled right-click stops nobody who knows what they're doing. An encrypted file with no plaintext version anywhere on the network is a real barrier.
And unlike building this kind of pipeline yourself, Secure3JS is free and doesn't require you to write any encryption or DRM logic you just run your model through it before you host it.
Next up in the series: integrating Secure3JS into your existing or new Three.js website, so your encrypted models actually load and render for visitors. Part 2 goes live soon — subscribe to the blog or the YouTube channel so you don't miss it.
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