File Extension/STEP
alphabetical list of extensions

File extension .STEP

Description of the problem
If you have on your computer a .STEP file that you cannot open, you are in exactly the same situation as thousands of other people who have similar problems with this or any other unknown file.

There may be several reasons why you cannot open the file with .STEP extension. Directly on this website you can find a solution of the most common problem with the .STEP file – that you do not have on your computer the appropriate program to open the file.
Solution
From the list below, select the appropriate program, install it and double click on the icon of a file that did not want to open - the problem with the .STEP file extension should be solved. However, if this does not happen, go back to the website to learn about other possible causes of the error, which have been described at the bottom of the website.
Category
3D Image Files
Developer
N/A
Popularity
StarStarStar
File name: STEP 3D Model
Programs that will open this file:
Windows
Windows
3D Object Converter 3D Object Converter
AutoCAD AutoCAD
CATIA CATIA
Creo Parametric Creo Parametric
FreeCAD FreeCAD
Fusion 360 Fusion 360
SolidWorks SolidWorks
STEP File Browser STEP File Browser
TurboCAD TurboCAD
VariCAD Viewer VariCAD Viewer
ZEMAX ZEMAX
Mac OS
Mac OS
FreeCAD FreeCAD
TurboCAD TurboCAD
Linux
Linux
CATIA CATIA
FreeCAD FreeCAD
Android
Android
Fusion 360 Fusion 360
iOS
iOS
Fusion 360 Fusion 360
Windows Phone
Windows Phone
Fusion 360 Fusion 360
Remember!
The .STEP file extension can correspond to several not related file formats. If there is more than one file format with the .STEP extension, you will probably find most of them at this website. Remember that you need to download a program to support a particular file type. So first look through the entire contents of the website to select a program to support just the file you have.

Other possible reasons why your .STEP file does not want to open

In addition to the problem described above, i.e. the lack of the appropriate application to support the .STEP file, there may be several reasons that cause problems with opening and operation of the data format:

1. Incorrect version of the installed application

A quite common problem is the lack of application in the appropriate version. Even if you have an application, with the help of which you should open the .STEP file, you may have a problem with it because of its version. Perhaps in previous versions the application has not yet supported the .STEP file, so download the update and check again.

2. Incorrect .STEP file association with the program

If you have already installed the appropriate application, and it is the correct version, the file may not open correctly, because the operating system does not have information that this program supports the file. So you need to "show" which program the computer should use. To do this:

  • Right-click the .STEP file
  • Go to the "Open with" - then "Choose default program ..."
  • Locate the appropriate application
  • Click "OK"

3. The file is corrupt

It also happens that the file you want to open is corrupt and therefore there is no such possibility. In this situation, you should find its different version, or ask a person from whom you got, to send it again.