Convert PLY to STL
Convert PLY to STL free in your browser. No upload, no signup, no watermark. Files stay on your device.
drop a .ply file
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how to convert ply to stl
Drop your PLY file
Drag your PLY file into the drop zone above, or click the box to pick a file from your computer or phone. The browser reads the file directly — nothing uploads.
Click Convert
The page runs three.js on your device to decode the Polygon File Format (Stanford) and encode it as Stereolithography. Most conversions finish in a few seconds; large or codec-heavy files (RAW, video) can take longer.
Download the STL file
When the conversion finishes, the STL file is ready to download. Save it anywhere on your device.
FAQ
common questions
Why convert PLY to STL?
PLY (Polygon File Format) is common in 3D scanning, photogrammetry, and research workflows — output from tools like RealityCapture, Meshroom, or scientific instruments. STL is the 3D-printing standard. If you have a scanned object or research mesh you want to 3D-print, converting PLY to STL is the bridge.
Will vertex colours from the PLY survive?
No — STL stores geometry only (no colour or material data). Per-vertex colours from PLY scans (typical photogrammetry output) are dropped during conversion. The STL output captures the mesh shape exactly but is colourless. For colour 3D printing, look at AMF or 3MF instead of STL.
Will I lose the mesh's resolution or detail?
No — every vertex and face transfers exactly. Polygons are triangulated if needed (PLY can have arbitrary polygons; STL is triangles-only), but the overall geometry is preserved with full fidelity. Your model retains its scan-level detail.
How does the file size change?
Usually smaller. PLY (especially ASCII PLY) is verbose; binary STL is compact. A 100 MB PLY scan often becomes a 30–50 MB STL. Most of the savings come from dropping vertex colour data and using binary instead of text encoding.
Will the STL be ready to 3D print?
Mesh-wise yes, slicer-wise check first. The conversion preserves geometry but doesn't fix mesh issues (non-manifold edges, internal walls, inverted normals) that can come from scanning. Before sending to a slicer, run the STL through a mesh-repair tool (Meshmixer, MeshLab, or Cura's built-in repair) to ensure it's printable.