3 Best STL Converters For 3D Models [Try Them Now!]

Here are the best STL converters for your 3D models to get 3D printed. This will save you a ton of time doing researching since there are so many options.

Let’s check them out:

STL Converters To Use


It’s online and free! It’s also fast and hassle free. No learning curve

Convert your 3D models into STL files. A wide range of supported files, from STL to PLY. Easy to use.

If you just want to convert your 3D file quickly, Go with this if this is the first software you find.

Try this converter here.


This open source website supports more than 3D different formats, including STL, FBX, Blender, OBJ, 3DS DXF, LWO, or PLY.

Try this converter here.

CAD Exchanger

Made for DATA translation. Supported files in includE: OBJ, 3dm, brep, step, a lot of file formats.

You can download this 3D model converter for free and then upload your files to get them converted to or from STL format.

Try this converter here.

Common FAQ

Why STL File For 3D Printing?

STL (STereoLithography) is a 3D printing file format used to store the object’s shape information. The shape is defined by a mesh which is composed of triangular faces which are composed of 3 vertices and a normal face to define its orientation.

STL file formats is still the most common for 3D printing. In order to use additive manufacturing, you might want to get your 3D model converted into an STL.

Is My STL File Converted Correctly?

You must make sure the STL file is converted correctly and it’s not broken.

We recommend using an online testing tool that will immediately let you know if there are any bad edges, print support issues, normal inversion, crossed volumes, holes in your mesh and many more.

This will save you lot of time and headache later.

4 Common Mistakes When Converting STL File

  • Normal inversion. The faces of your model need to face toward the outside in order to be understood by the software and the printer.
  • Holes in the mesh. It is not possible to have holes in the mesh. It means that each edge must be connected to another.
  • Crossed volumes. If two or more volumes are crossed together and not bonded by the edges, the model cannot be properly 3D printed.
  • Bad edges – Two edges are not properly bonded and looks overlapped

We highly recommend properly draft the model in the CAD software and correct it before exporting to an STL file format.

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