To fix STL files, one can easily access these applications and get the job done in the minimum time possible. However, few errors do require some hands-on work through manual editing.įor these reasons, the applications are created keeping both aspects in mind. Those with minor defects can be fixed using automatic wizards. However, with advancements, newer technologies have surfaced that offer automatic as well as manual access to repair STL files online. The tools were limited and most of the work used to be manual. There was a time when designing models weren’t very easy. List of Applications to Repair STL Files Online.