Hello Dear
I Have read your project description and glade to inform you that you need looking for a solution to show a preview of a user uploaded STP file. We're using PHP / javascript for this websit
i can do your work as per your requirement.
I can do all type of website design like PHP,word press,Joomla,landing page ,SEO,Magneto.,customization,speedup,etc.
I can also do website and mobile app mock up design.
i am working on as per your time frame and top quality of work
Thanks and regards
Anish Jaggi