ModelSplitter is built for a desktop or tablet with a stylus — a phone screen is too small to draw a seam precisely. You can still read about it below.

From Miniature to Massive

Split and key any 3D model — exactly where you want

Draw natural seams, make straight or automatic cuts, add matching keys and export printable parts — privately in your browser. Paint a region or draw a seam, cut the model along it, and it fits the pegs and sockets that bring the parts back together in one position.

Drop an STL or 3MF here

No model yet? Make one from a photo or a prompt with Tripo AI (affiliate link)

Free public beta — all current tools unlocked for testing. ModelSplitter runs locally in your browser, so your model is never uploaded. During the beta it sends anonymous counts, with no cookie or ID, so we can see what to fix. Never your model, its name, or anything you type — with two exceptions, each only when you press its button: the feedback box sends exactly what you wrote in it, and the launch-list form sends your email address to MailerLite. Nothing from another company loads unless you ask to join the Pro launch list, which uses MailerLite's sign-up form. Features and Free/Pro availability may change before version 1. Kickstarter backers get every Pro feature, current and future, for as long as ModelSplitter operates. Best on a desktop or laptop: it wants a mouse and room to see the model.

Exactly what is counted

Which tools and cut methods get used, the rough size of the model, how long a cut took and into how many parts, the export format, and when something fails and where in the code. With them go the language, the theme, any campaign tags in the link you arrived by, and whether the launch-list box was opened. Nothing is read from your computer itself: not its screen size, processor or memory. No visitor ID is given out, and each count is stored on its own, without a cookie or your IP address.

Pro is coming to Kickstarter Every tool is free while ModelSplitter is in beta. When Pro launches on 3 November, the first 50 backers get it for £25 instead of £49. Join to be told the moment it opens; joining doesn't reserve a place. Three Pro licences are also drawn on launch day — see how it works Follow on Kickstarter
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Pro is coming to Kickstarter

Every tool is free while ModelSplitter is in beta. When Pro launches on Kickstarter on 3 November, the first 50 backers get it for £25 instead of £49: one payment, every Pro feature now and in future.

Join to be told the moment it opens. Joining doesn't reserve a place. Three Pro licences are also drawn on launch day.

Follow on Kickstarter

Tell us what you think

What worked, what did not, what is missing. It goes straight to me, the person building this. Write in whatever language you like.

How did that go?

Anything you would like to add?

Only used to write back about this. It does not put you on any list.

Objects
Projects
Sculpt
Pose New
Erase New
Shapes
Add a solid to cut with, then Move it into place and use Boolean.
Size, mm
Type any one of them — X, Y, Z — and the other two follow.
Move
Click one object to move it.
Solid mould
A box to pour silicone in: two sides that bolt together, and a lid printed with the working model standing on it by its base, so it hangs upside down in the box and its base is left open to pour the resin into. A vent rod runs to every place air would be trapped.
Jacket mould
A skin of silicone the same thickness all round the model, inside a printed shell in two halves that bolt together, and a lid printed with the working model standing on it by its base. It peels off thin parts and wax casts, and takes less silicone than a solid block. The silicone runs out into a step round the flange, so bolting the halves together presses it closed.
Boolean
Click two objects to combine them.
Inspect & repair
Look the working piece over before cutting it.