Is my model printable?
Drop an STL or 3MF to check if it’s watertight, whether it fits your printer, and how much filament it will use — with weight and cost. Free, private, and nothing is uploaded.
What you get
A complete print-readiness report
- Plain-language verdict: is your model print-ready, likely fine, or does it need work — no jargon required.
- Watertight & manifold report: holes, open (boundary) edges and non-manifold edges, so you know what a slicer will see.
- Bed-fit check against Bambu, Prusa, Creality and Elegoo presets — including whether it fits after a 90° rotation.
- Filament weight, length and material cost from the model’s real volume, with PLA/PETG/ABS/resin densities and your spool price.
- Unit-scale sanity check that flags a model exported in inches or centimetres before it prints thumbnail-sized.
- STL and 3MF supported, analyzed on a background thread so even large models don’t freeze the page. 100% private.
Process
How it works
- Drop your STL or 3MFThe model loads and is analyzed entirely in your browser — nothing is uploaded.
- Read the verdictSee whether it’s watertight, how big it is, and whether it fits your printer, with the exact topology behind it.
- Estimate filament & costPick your material and spool price to get the weight, length and cost of a solid print.
Notes
Good to know
- Filament weight and cost assume a solid (100% infill) print; real prints with infill and supports use less — treat it as an upper bound.
- STL is unitless and 3MF is usually millimetres, so all sizes assume millimetres. The scale check flags obvious inch/centimetre mistakes.
- Volume needs a watertight mesh to be meaningful; if the model has holes, seal it in the STL repair tool first.
- The bed-fit check considers a flat 90° rotation, not arbitrary tilting — a model may still fit at an angle a slicer can arrange.
- Everything runs on your device, so very large meshes depend on your machine’s speed and memory.
FAQ
Questions, answered
How do I know if my STL is printable?
Drop it in. The checker reports whether the mesh is watertight and manifold, whether it fits your printer bed, and how much filament it needs. A closed, watertight model with sensible dimensions is print-ready; open holes are flagged with a link to repair them.
Is my model non-manifold but still printable?
Often, yes. A closed mesh with non-manifold edges usually slices fine because slicers resolve the interior with their fill rules. The verdict says “should print fine” for those and reserves the warning for genuinely open geometry that can leak.
How is filament weight calculated?
From the model’s volume × the material density (e.g. PLA 1.24 g/cm³). Cost is that weight × your spool price per kilogram. It assumes a solid print, so a real print with infill uses less.
Will my model fit my printer?
The tool compares the model’s bounding box to common printer build volumes (Bambu, Prusa, Creality, Elegoo) and tells you if it fits — and whether rotating it 90° on the bed would help.
My model imports tiny or huge — why?
STL has no units, so a model exported in inches shows up 25.4× too small and one exported in a different unit can be far too large. The checker flags a suspicious overall size and suggests the likely scale factor.
Are my files uploaded?
No. Parsing and analysis run locally in your browser using fast typed-array geometry code. Your model never leaves your device.
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