Do I lose the scan's colors?

In the STL, yes — the format stores no color. If your goal is color visualization, stay in PLY or convert to GLB; if it's single-color printing, the STL is exactly what you need.

My scan has millions of triangles — convert it anyway?

You can, but reduce polygons first: a 3M-triangle scan doesn't print any better than a 300k one — it just slows everything down. Reduce to 10–20% and then convert.

Does it work with binary and ASCII PLY?

Both. Scanners usually export binary (more compact); some scientific software uses ASCII. The converter detects the type automatically.

No file handy?

Convert toSTL

Coordinates and scale are preserved exactly as they are.

Convert PLY to STL

Drop your PLY files and download them as STL: free, in batch, and they never leave your device.

PLY → STL: what you should know

PLY to STL is the standard route from 3D scanning to the printer: scanners — from the iPhone's to industrial and dental intraoral units — export PLY because it stores per-vertex color and scan properties, but slicers and print services ask for STL. This conversion bridges the two without touching the geometry.

The PLY's vertices and triangles are copied into the STL with their exact coordinates: a millimeter-calibrated scan still measures the same after converting. And since everything runs in your browser, sensitive scans — industrial parts, clinical data — are never uploaded to any server.

The PLY's vertex color can't travel into the STL (the format doesn't support it), but for single-material printing it doesn't matter. Useful tip for scans: they usually come with floating fragments and holes — the mesh repair + polygon reducer combo turns a raw multi-million-triangle scan into a clean printable part.

Related conversions

PLY → OBJ PLY → GLB PLY → USDZ PLY → 3MF OBJ → STL glTF → STL GLB → STL 3MF → STL

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