How to open STL file extension?

The author of advice: Mr Brankiewicz

STL files are incessantly popular. However, a file name containing STL file extension is problematic for some of the users. They have problems with correct opening of a file with STL extension. However, it should be remembered that STL file extension can match one or more types of files. The most popular is Stereolithography Format but if there are others, you will find information concerning them below.

So, it is worth looking close at the problem concerning STL files and search for its solution.

A list of programs supporting files types with STL extension can be found below. Applications are sorted according to appropriate operational systems and their popularity.

  • Stereolithography Format

    .stl file extension

    Category: 3D&CAD Files

    OS Software
    Windows IMSI TurboCAD Deluxe 17 IMSI TurboCAD Deluxe 17
    Rapidform Basis Rapidform Basis
    Parametric Technology Pro/ENGINEER Parametric Technology Pro/ENGINEER
    Dassault Systemes CATIA Dassault Systemes CATIA
    MeshLab MeshLab
    MAC OS IMSI TurboCAD Deluxe v5 IMSI TurboCAD Deluxe v5
    Cheetah3D Cheetah3D
    MeshLab MeshLab
    GLC_Player GLC_Player
    Linux Parametric Technology Pro/ENGINEER Parametric Technology Pro/ENGINEER
    Dassault Systemes CATIA Dassault Systemes CATIA
    MeshLab MeshLab
    GLC_Player GLC_Player
  • Adobe Fireworks Style Library Format

    .stl file extension

    Category: Database Files

    OS Software
    Windows Adobe Fireworks CS5 Adobe Fireworks CS5
    MAC OS Adobe Fireworks CS5 Adobe Fireworks CS5
  • Certificate Trust List

    .stl file extension

    Category: Internet Files

    OS Software
    Windows Microsoft Internet Information Services (IIS) Microsoft Internet Information Services (IIS)

How to check if a file we want to open is not infected by malware or viruses?

  • Download Malware/viruses removal tool from STL files in the Windows system.
  • Click “Start scanning” and wait until the programme performs the scanning process on your computer.

What are the reasons of errors concerning STL extension of files?

The problem that often causes damage concerning STL extension are Windows system registry errors. That is why, in the first place it is recommended to:

  • Scan computer in order to identify, repair and open the STL file
  • Check system registry from the angle of hidden errors
  • Repair file’s associations with programs in the system registry

If you are not sure if the above problems concern you, you should consider other frequent irregularities:

  • You do not have an appropriate application installed that supports STL file extension
  • STL file is corrupted
  • The application’s version necessary to open the file is not correct
  • The file is not assigned to an appropriate program

Solving problems with STL files


If STL file does not open, firstly, it is worth using files associations built in the Windows system with application that can support them. In order to do it, you should double-click a STL file icon. A list of programs that probably support such a file will appear. It is enough to choose one of them so that Windows would open a given extension with it. Incorrect file’s association will result in Windows trying to open STL file with a wrong program all the time even if there is an appropriate application supporting this format on a drive. In this case, it is necessary to perform the above mentioned registry scanning and associations’ repair.

If associations are correct and Windows still cannot open the file, most probably the computer does not have appropriate software supporting files with name containing STL in their extension. The solution to this problem is very simple. You should buy or download a free (if they exist) application that will allow you to open, browse and edit STL format (You can also try to find more informations on FileInfo). It is no risk because many paid programs have free test versions enabling to check their functionality.

Do you have extra information about a STL file? [ Add information about a STL file ]

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