Is this STL to OBJ converter free?

Yes — unlimited conversions, no account, no watermark.

Does it support binary STL files?

Yes — both ASCII and binary .stl files are accepted.

Are my files uploaded?

No. The conversion runs 100% locally in your browser. Nothing is sent to any server.

Will the OBJ keep my model's scale?

Yes — vertex coordinates are copied exactly, so units are preserved.

STL to OBJ Converter — Free Online

How STL to OBJ conversion works

Drop your STL file (.stl, ASCII or binary) above.
The mesh is parsed locally in your browser — no CAD engine download needed.
Vertices and faces are serialized as a Wavefront OBJ file.
Preview the result and download the .obj.

Why convert STL to OBJ?

STL is the standard for 3D printing, but many modeling and rendering tools prefer OBJ: it is plain text, human-readable, and carries the same triangle mesh. Converting STL to OBJ makes your print-ready models editable in Blender, importable into Unity or three.js, and easy to inspect by hand.

About the OBJ output

Plain-text Wavefront OBJ (v vertices + f faces).
Both ASCII and binary STL inputs are supported.
Have a STEP file instead? Use the STEP to STL or STP to OBJ converter.

FAQ

Is this STL to OBJ converter free?: Yes — unlimited conversions, no account, no watermark.
Does it support binary STL files?: Yes — both ASCII and binary .stl files are accepted.
Are my files uploaded?: No. The conversion runs 100% locally in your browser. Nothing is sent to any server.
Will the OBJ keep my model's scale?: Yes — vertex coordinates are copied exactly, so units are preserved.