STL to OBJ converter

Drop a STL file, check the preview, download OBJ. The conversion runs in your browser, so your model never leaves your device.

Convert the attached STL file to OBJ

Files are processed entirely in your browser. Nothing is uploaded to a server.

Any 3D edit is just a prompt away.
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How the conversion works

STL is the standard mesh format in 3D printing: a plain list of triangles with no units, no color, and no materials. Nearly every slicer and CAD tool reads it.

The converter writes a plain OBJ that imports cleanly into Blender, Maya, and most game engines, which makes it a practical handoff format for further editing.

Frequently asked questions

Does my file get uploaded?

No. Parsing and export run in your browser with WebAssembly and three.js. The file stays on your device, and it works offline once the page has loaded.

What survives the STL to OBJ conversion?

Geometry comes through completely: every triangle, at full precision. Materials, textures, and vertex colors are dropped, because OBJ as written here stores plain triangles only.

Is there a file size limit?

Files up to 300 MB and 8 million triangles work. Heavier meshes take longer rather than failing outright; if a file is unwieldy, reduce its triangle count first with the reduce tool.

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