Free alternative to openinig solidwork defualt files in linux( *.sldprt & *.sldasm)?

Another option is Edrawings. It is a free lightweight viewer for Solidworks files and assemblies. I had completely forgotten about it until @Eric S mentioned that Onshape files are open to everyone in the free version.

The only problem is that probably there is no option for linux. Unless you use an android emulator and you download the mobile version.

Another option is going online to onshape.com. It is a browser based parametric modelling software.

It has a quite interesting story. It has been developed by [Hirschtick](https://en.wikipedia.org/wiki/Jon_Hirschtick#:~:text=He was a player and,eventually grew to %24600 million.). The same guy that developed Solidworks. Hirsthtick eventually left Solidworks because he had a difference in vision with Dassault (i.e. the 3d CAD should be working towards the browser - not the workstation). After he left, he started developing Onshape, and a couple of years back, he sold it to PTC that develops PTC Creo (a competitor of Solidworks).

I've been working over 10 years with Solidworks and its still my preferred tool of choice. I've also tried a couple of others like Inventor and Creo. However, the transition to Onshape has been the smoothest.

If you know anyone that has SolidWorks or someone on this site who offers, you could send them your SLDPRTs and SLDASMs and they could import them and send them back to you as STLs which you can import into FreeCAD.

I might be able to convert them for you.

As mentioned before, you could use an exchange file format such as IGS or STEP and import this file into FreeCAD. Another option is to use Onshape that lets you import SolidWorks files for free and you could convert it to another file format.

I found one way and that is to use free online solid-work platform to change those tile format to desired new format: