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Formats / STL

Convert STL files

Convert STL (STL Mesh) files into 9 formats, right in your browser. .stl · model/stl

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About this format

Made in 1987 for 3D printing. Only triangular faces — no colour, material or units. That makes it simple and universal, and the default format every printer slicer accepts.

What it can hold

  • Triangular faces (shape)

What it cannot

  • Colour and material
  • Units — the file does not say mm or inches
  • Part separation

When you convert it

STL → OBJNothing lost; colour becomes possible.
STL → GLBViewable on the web, still without colour.
STL → 3MFUnits and colour gained. The printing successor format.

When it will not open

  • Appears 1000× the wrong size — a unit problem. Check mm vs inch
  • Faces flipped inside out

In one line stl carries shape only. For colour or units, use 3mf or obj.

Convert this format into · 9

STL→3MFSTL→DAESTL→GLBSTL→GLTFSTL→OBJSTL→OFFSTL→PLYSTL→XSTL→X3D

Convert into this format · 26

3DS→STL3MF→STLAC→STLAMF→STLASE→STLBLEND→STLBVH→STLCOB→STLDAE→STLFBX→STLGLB→STLGLTF→STLIFC→STLIQM→STLLWO→STLMD2→STLMS3D→STLNFF→STLOBJ→STLOFF→STLOGEX→STLPLY→STLPMX→STLSMD→STLTER→STLX3D→STL

Frequently asked questions

How do I convert a STL file?

Drop the file into the window, pick the target format, and download the result. No account required.

Do I need to install anything?

No. It runs in your browser. A Windows installer is available separately if you prefer one.

What if the format I want isn't listed?

Every engine's capabilities are merged into a single graph, so unlisted pairs are chained automatically through intermediate formats along the least-lossy route.