How to Open OBJ Files in OrcaSlicer

OrcaSlicer is a free, open-source slicer forked from Bambu Studio that supports printers from many brands.

Short answer · Built in

Yes. OrcaSlicer opens OBJ files as shipped: File › Import (Ctrl+I).

Import OBJ into OrcaSlicer, step by step

1Check the fileKeep the .mtl file and any texture images in the same folder as the .obj, with their original names; the OBJ refers to them by name.
2Import into OrcaSlicerFile › Import (Ctrl+I).
3Check scale and orientationOrcaSlicer works in millimetres and is Z-up. OBJ files are unitless, so the size depends on what the exporter assumed.
4Place it and sliceLay the flattest face on the plate, confirm the dimensions in the object panel, and slice. Slicers ignore textures and animation.

What comes through

Shape	Yes, always.
Colours and materials	Ignored: OrcaSlicer only uses the shape.
Textures	Not used by a slicer.
Animation	OrcaSlicer doesn't play animation.

Things to watch for

OBJ colours can be assigned to filaments.
Run the built-in calibration prints (flow, pressure advance, temperature) once per filament; they matter more than model tweaks.

Questions

Does OrcaSlicer support OBJ files?: Yes. OrcaSlicer opens OBJ files as shipped: File › Import (Ctrl+I).
Why is my OBJ model the wrong size in OrcaSlicer?: OBJ files are unitless, while OrcaSlicer works in millimetres. Scale the model after importing, then apply the scale before you continue.
What is the best 3D format for OrcaSlicer?: 3MF and STL are the most reliable choice for OrcaSlicer. If you have a choice when exporting, pick 3MF over OBJ.

Menu names follow the OrcaSlicer open-source project's current release. Check the official OrcaSlicer documentation if your version differs.

Written with AI assistance by the Renderlyst team in October 2026. Format support reflects each app's current release as we understand it, and we link the official documentation so you can confirm it for your version. Spotted something out of date? Email alishbakhalid766@gmail.com.