●
3DAI
Free · runs in your browser · no signup

Convert FBX to STL for 3D Printing

Game assets, Mixamo characters and models from Maya or 3ds Max usually come as FBX, but slicers want STL. This page merges the meshes of the FBX into one STL on your device, uses the unit stored in the file to get millimetres right, and stands the model up for the build plate.

Loading the converter...

How to use it

  1. 1

    Add the .fbx

    Drop it onto the box or click to choose it. Binary and ASCII FBX 7.x are read.

  2. 2

    Check the size

    The FBX unit is detected and turned into millimetres. The size readout shows how big the print will be.

  3. 3

    Set axis and floor

    FBX is Y-up and slicers are Z-up, so the model is turned upright and placed on the floor by default.

  4. 4

    Download the STL

    Binary STL by default. Open it in your slicer and check for open edges before printing.

What to know before you convert

  • STL is geometry only. Colours, textures, materials, bones and animations are dropped.
  • A rigged character is exported in its rest or bind pose, not in a frame of an animation.
  • All meshes are merged into one STL. Game models are often made of separate overlapping parts and may need to be joined or repaired in your slicer or a mesh editor.
  • FBX 7.0 (2011) and newer is supported. NURBS surfaces and curves are not converted.
  • The mesh is not repaired or thickened. Thin planes such as hair cards or leaves will not print until they are given thickness.

Don't have a model?

Create one with AI from a photo, a sentence or a sketch. The generators use credits; this converter is free and stays in your browser.

Image to 3D →Turn one photo into a textured 3D model.Text to 3D →Describe an object and get a GLB.Sketch to STL →Draw it, get a printable model.

Frequently Asked Questions

Slicers read STL numbers as millimetres, while most FBX files use centimetres. A 20 cm figure saved as plain numbers prints at 20 mm. The converter reads the FBX unit and scales to millimetres for you; pick another scale if you want the print smaller or larger.
Often yes, after some clean-up. The STL is a faithful copy of the surface, but game models can have holes, separate eyes, single-sided hair and thin parts. Check the watertight readout and repair or thicken parts before printing.
Not on this page. The model is exported in the pose it was rigged in. To print a specific frame, pose it in Blender or download that pose from Mixamo, then export it as FBX or STL.
FBX uses Y as the up axis and printers use Z. The "Y-up to Z-up" option fixes this and is on by default. Turn it off if the FBX was already saved Z-up, for example from some CAD tools.
STL cannot store them, so they are dropped. For a colour print, convert to OBJ or GLB and use a slicer that supports colour, or paint the STL in your slicer.
No. The page reads the file and converts it inside your browser with the open-source three.js library. Nothing is sent to our servers, there is no account, and no credits are used. Closing the tab discards everything.