SolidWorks supports ISO STEP format (*.stp, *.step) by default, so you can simply re-save the part as SLDPRT. The option would be to find a program that is capable of saving in SolidWorks' formats which may be a little tricky. However it should definitly be possible to perform a STEP to SLDPRT conversion.
Convert ISO-10303 STEP product data to SolidWorks CAD part.
We have found 3 software records in our database eligible for .step to .sldprt file format conversion.
Microsoft Windows software - convert step to sldprt on Windows
A popular is 2D and 3D CAD (computer-aided design) and CAE (computer-aided engineering) construction software for Microsoft Windows developed by SolidWorks Corporation.
SolidWorks is distributed in three distributions: Solidworks Premium, Solidworks Professional and SolidWorks Standard.
Convert from step file
to sldprt file
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 step to sldprt. 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.
A set of 3D modeling tools for Microsoft Windows, Alibre Design Professional is used for the fast creation of complex geometry and other 3D modeling purposes.
EnSuite represents tools for visualization, analyzing and sharing of CAD data.