What does watertight mean?

That the surface fully encloses a volume with no gaps. A slicer cannot tell inside from outside on a mesh with holes, which is where most failed prints begin.

Which files can I check?

GLB and glTF models. Drop one on the page and the checks run on it directly.

Is my model uploaded anywhere?

No. It is analysed in memory and never stored, which is the point of a check you can run on a model that is not yours to publish.

Does it estimate the filament?

Yes, along with the print size, so you know roughly what the print will cost in material and whether it fits your bed before you start it.

Grafy

3D Printability — is your model print-ready?

Drop a GLB or glTF model to check it is watertight and manifold, count holes and separate parts, and estimate print size and filament.

Watertight and manifold checks
Holes and separate shells counted
Print size and filament estimated
Analyzed in memory, never stored

How it works · From the blog · All tutorials · Community gallery

What it makes

3D Printability answers one question: will this print? Drop in a GLB or glTF model and it checks whether the mesh is watertight and manifold, counts the holes and the separate shells, and estimates the print size and how much filament it would take. The model is analysed in memory and never stored.

For the moment before you start a print that takes nine hours — and for anyone handed a model by somebody else who needs to know what is wrong with it.

How a session works

Drop a GLB or glTF file onto the page. Nothing is uploaded to a library and nothing is kept.
Read the checks: watertight, manifold, how many holes, how many separate parts.
Take the print size and filament estimate to your slicer, or go and fix the mesh in 3D Studio.

What it costs

The printability check is included from the Free plan and costs no credits. Fixing a mesh in 3D Studio is where a remesh or a repair spends them.

Generation spends credits: paid plans include a monthly allowance, the Free plan starts with a one-time welcome grant, and you can top up at any time.

Included from the Free plan.

Examples from the community

Published by people using Grafy. The gallery has the rest. Community gallery

Questions

What does watertight mean?: That the surface fully encloses a volume with no gaps. A slicer cannot tell inside from outside on a mesh with holes, which is where most failed prints begin.
Which files can I check?: GLB and glTF models. Drop one on the page and the checks run on it directly.
Is my model uploaded anywhere?: No. It is analysed in memory and never stored, which is the point of a check you can run on a model that is not yours to publish.
Does it estimate the filament?: Yes, along with the print size, so you know roughly what the print will cost in material and whether it fits your bed before you start it.