File Extension Library

.STEP File Extension

  • Category: 3D Image Files

What is an .STEP file?

.STEP file extension has been classified as 3D Image Files.

.STEP is STEP 3D Model

A STEP file is a 3D model file formatted in STEP (Standard for the Exchange of Product Data), an ISO standard exchange format. It contains three-dimensional data in a format that can be recognized by multiple programs.

In the CAD industry it can be difficult to share models between users with different CAD systems. The STEP format was developed as a solution to this problem. It is designed to be used similarly to how the .PDF format is used for saving documents in a widely supported format. You would most likely see the file when it is sent to you by another CAD user sharing a 3D model that you can view using different CAD software.

NOTE: The STEP format is STEP model files often use the .STP file extension.

List of all softwares that can open the STEP 3D Model
Dassault Systemes SolidWorks
Autodesk Fusion 360
Kubotek USA KeyCreator
Dassault Systemes CATIA
Siemens Solid Edge
SpaceClaim Engineer
CADSoftTools ABViewer
IMSI TurboCAD Deluxe
Autodesk Fusion 360
Dassault Systemes CATIA
Autodesk Fusion 360
Autodesk Fusion 360
Windows Phone
Autodesk Fusion 360
Autodesk Fusion 360

How to Open .STEP file on different platforms

Open .STEP File on Windows

  • Right-click a .STEP
  • Left-click "Open With" > "Choose another app"
  • Select the program that opens .STEP file and Select check box "Always use this app to open .STEP files" Press "Ok"

Open .STEP File on Mac

  • Right-click (or Ctrl + Left-click) the .STEP file
  • Click "Open With" > "Other.."
  • Then choose another program from the app list and press "Open"
  • Select check box "Turn on" for "Always open in app"

Open .STEP File on Linux

Right click on the .STEP file, choose "Open with" and select a program from the list above

Open .STEP File on iPhone

Select a file. If you don't see an application to open the .STEP file, tap "Share" and choose the right app.
Method 2
Save the file. Then open the app «Files». Touch and hold the file, then release your finger. You will see a black menu bar. After that tap "Share" and select an application.

Open .STEP File on Android

Tap the Settings icon on an Android smartphone, then select «Applications». Click the Settings icon in the upper right corner of the screen, to change the default apps.
If you want to open, edit, save or even convert .STEP files on Android, then your best bet is to download one of the dedicated apps available on Google Play.

How to fix problems with .STEP files

  1. You need to update the application that you normally use to open .STEP files. Only the latest version of the software supports the current .STEP file format
  2. You need to check the .STEP file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)