Using some of the 3D modeling or conversion utilities it should be possible to convert stereolithography files (.stl) which are used for 3D printed to the polygon .ply files. Although usually the opposite conversion is done, stl to ply conversion should be doable.
Home > Search converters: stl to ply
Conversion of stl file format to ply file format beta
Search for stl to ply converter or software able to handle these file types.
Convert Stereolithography CAD data to Polygon graphics.
We have found 11 software records in our database eligible for .stl to .ply file format conversion.
Microsoft Windows software 
- convert stl to ply on Windows
PolyTrans|CAD+DCC
A 3D CAD translation software
File extension | Convert | Open | Save | Edit | Create | Import | Export | Extract |
|---|---|---|---|---|---|---|---|---|
Convert from stl file | No | No | No | No | No | Yes | Yes | No |
to ply file | No | No | No | No | No | Yes | Yes | No |
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned stl to ply. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
3D Builder
Create models and print in 3D
3Data Expert
A professional manufacturing data preparation software
Autoconverter
A converter for 3D formats
meshconv
A 3D mesh converter
Metasequoia
A polygon modeler for 3DCG and game development
TransMagic
A dedicated CAD converter
Apple macOS / Mac OS X software 
- convert stl to ply on OS X
Afanche 3D Viewer for Mac
A Mac version of the popular 3D visualisation software
Multiplatform software 
- convert stl to ply on any platform
CloudCompare
A 3D point cloud processing software
Meshlab
An open source system for 3D triangular meshes
On-line services software 
- convert stl to ply on web
Online 3D Model Converter
A free online 3D model conversion service
Additional links: Open stl file, Open ply file
STL
Files with stl extension can be mainly found as stereolithography files for 3D printers. Used in many CAD programs as output format for models and prototypes that could be printed in stereolithography devices.
PLY
Files with ply file extension can be found as various polygon 3D data files generated by many 3D modeling or CAD programs.
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