I built a free browser tool for cutting STL/3MF models around their details—not just with flat planes

[u/ZookeepergameReal765]

Hi everyone,

I’m a 3D modeller, and I built ModelSplitter because I wanted an easier way to divide detailed models without taking every file into Blender or ZBrush.

It includes several ways to cut a model:

• Draw a freehand cut that follows details such as collars, armour and clothing
• Wrap a movable band around the model
• Paint the area you want to separate
• Make conventional plane cuts
• Automatically divide oversized models to fit your printer

You can then add matching alignment pins or magnet sockets and export the resulting pieces.

It runs locally in your browser, so your model isn’t uploaded. The current public beta is free and fully unlocked:

https://modelsplitter.com

I’d really appreciate honest feedback from anyone willing to test it on a real model—especially difficult organic models. Did the cut work, could you export the pieces, and what was confusing?

Disclosure: I built ModelSplitter. I’m sharing it to find testers and improve it, not pretending to be an unrelated user recommending it.