Files with slp file extension can be found as ASCII 3D graphics exported from Pro/Engineer (now known Creo Elements/Pro).
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.SLP file extension - Pro/ENGINEER rendering data
What is slp file? How to open slp files?
File type specification:
The slp file extension is associated with the Pro/Engineer (also known as Creo Elements/Pro) a CAD and CAM solution for Microsoft Windows developed by PTC.
The slp file stores 3D data rendered in the Pro/Engineer.
SLP can be considered a very old and basic ASCII file format of the 1990s exported from Pro/Engineer. It is very similar to the world's simplest 3D file format, STL, but it also allows for a color to be assigned to each polygon and vertex normals to be associated with each vertex. The modem way to convert from ProE/Creo would be via native CAD files or IGES/STEP and not via SLP or STL.
Updated: March 24, 2024
The default software associated to open slp file:
Pro/Engineer (Creo Elements/Pro) 
Company or developer:
Parametric Technology Corporation
Pro/Engineer is integrated 3D CAD/CAM/CAE solution used to mechanical engineering, design and manufacturing. First version was released in 1997. Pro/Engineer runs on Microsoft Windows and Unix. In 2010 Pro/Engineer was renamed on Creo Elements/Pro.
List of software applications associated to the .slp file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open slp file, edit slp file, convert slp file, view slp file, play slp file etc. (if exist software for corresponding action in File-Extensions.org's database).
Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting slp files.
Software that open slp file - Pro/ENGINEER rendering data
Programs supporting the exension slp on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about Pro/Engineer (Creo Elements/Pro) for open slp file action.
