3D Print Simulator

Slice an STL and watch it print, layer by layer.

Slicing runs entirely in your browser — your model is never uploaded.

1 Choose an STL

Drag an STL here, or

Nothing leaves this machine.

Slice an STL and preview the print

See how a model will print before you use any filament. Load an STL, set the layer height, nozzle, walls, top and bottom layers, infill, bed size, speed and temperatures, and slice it. Then watch it build up layer by layer, with walls in orange and infill in blue.

It reports the estimated print time and the filament length and weight, warns you if the model does not fit your bed, and lets you download the G-code. Your model is never uploaded: the slicing runs in your browser.

Tips for a good print

  • 0.2 mm layers and a 0.4 mm nozzle are the usual starting point.
  • Use it to compare settings quickly, for example how much time a finer layer height adds.
  • It has no supports, brim or raft, and the time does not model your printer's acceleration, so your own slicer has the final word.

Frequently asked questions

Can I slice an STL online without installing a slicer?

Yes. This slices in your browser and gives you a toolpath preview, a time and filament estimate, and G-code.

How accurate is the print time?

It is an estimate. It does not model your printer's acceleration, so real prints usually differ a little; your own slicer knows your printer better.

Should I print the G-code it makes?

It is best used as a preview. It has no supports, brim or raft, so for real prints use your own slicer with your printer profile.

Is my model uploaded?

No. The slicing happens on your own computer.