If you are seeking information about file extensions, then you are in the right place at the right time.

Details of extension .step

On this page, we're going to take a closer look at the .step file extension.

We'll explain what exactly a .step file format is and how you can use it. If you're interested in learning more details about this type of file, we'll show you where to find them. And if you ever need to convert .step files into different formats, we'll give you some tips on how to do that too.

Let's see the 3 file formats associated with this file extension!


  1. ISO 10303 STEP Document
  2. Tekla STEP Data
  3. Catia Document

We trust that our website will provide valuable information for you. If you have any questions, just ask!

ISO 10303 STEP Document

step file - ISO 10303 STEP Document
The STEP file belongs to the Document category and works with Solid Edge, being used as an ISO 10303 STEP Document. ISO 10303 is an ISO standard for the computer-interpretable representation and exchange of product manufacturing information. Its official title is: Automation systems and integration - Product data representation and exchange. It is known informally as STEP, which stands for Standard for the Exchange of Product model data. ISO 10303 can represent 3D objects in Computer-aided design (CAD) and related information. The developer is still actively supporting the Solid Edge, likely. Our data shows that Solid Edge uses 8 more file types.
Application: Solid Edge
Program name: -
Category: Document files
Mime-type: application/octet-stream
Related extensions:
.stpxz XZ Compressed STEP Document
.asm Solid Edge Assemblies Document
.psm Solid Edge Sheet Metal Document
.dxb Autodesk Drawing Interchange Binary

Tekla STEP Data

stp file - Tekla STEP Data
The STP file belongs to the Data category and works with Tekla Structures, being used as a Tekla STEP Data. Tekla Structures is a tool for structural engineers, detailers, and fabricators. It is an integrated model-based 3D solution for managing multi-material databases (steel, concrete, timber, etc.). Tekla Structures features interactive modeling, structural analysis and design, and automatic drawing creation. The developer is still actively supporting the Tekla Structures, likely. Our data shows that Tekla Structures uses 19 more file types.
Application: Tekla Structures
Program name: -
Category: Data files
Mime-type: application/octet-stream
Related extensions:
.uel Tekla Structures Custom Components Data
.idrm Tekla ID Mapping File
.cnv Tekla Structures Conversion File
.bass Tekla Structures Bolt Assembly Data

Catia Document

stp file - Catia Document
The STP file belongs to the Document category and works with Catia, being used as a Catia Document. It is based on STandard for the Exchange of Product model data. CATIA (Computer Aided Three Dimensional Interactive Application) is a multi-platform CAD/CAM/CAE commercial software suite developed by Dassault Systemes and marketed world-wide by IBM. The developer is still actively supporting the Catia, likely. Our data shows that Catia uses 36 more file types.
Application: Catia
Program name: -
Category: Document files
Mime-type: application/x-step
Related extensions:
.catvbs CATIA VB Script
.lgh Pro/ENGINEER Light Data
.254 Pro/ENGINEER Version Data
.adi AutoCAD Device-Independent Binary Plotter File

The .step file extension might not only belong to a single type of file, there could be various kinds that use it. Keep in mind that files with the .step extension may contain various content types. If you have helpful information about this extension, write to us!

Could someone have spelled the .step file extension wrong?

In our database, we came across the following similar extensions:

.stp Catia Document
.sep SEEP/W Data
.tsep Tekla Structures Extension Package
.srep SuperREP Compressed
.stsp ScanTango Scanner Plug-in
.stel Stella4D Polyhedron Data

The .step extension is frequently misused

People sometimes confuse the .step filename extension. Based on the searches on our site, here are the most common misspellings from the past year.

stp (1), sep (1), tsep (1), srep (1), stsp (1), stel (1), ste (1), tep (1)

Having trouble opening a .step file?

If you want to open a .step file on your computer, you just need to have the appropriate program installed. Incorrect settings for the .step association can trigger this error.

Windows can't open this file:

File: example.step

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program with which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2016/2019/2022, Windows 7, Windows 8, Windows 10, Windows 11, Linux, Mac OS X, macOS, iOS, Android