STEP File Extension

STEP file icon
STEP 3D Model
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What is STEP file?

File with STEP extension contains 3D CAD object data saved in text format that conforms to ISO 10303-21 standard, also know as Standard for The Exchange of Product Data - STEP. The format was developed as a standardized data sharing format for CAD and CAM applications and platforms. STEP file is divided into parts or section, such as:

  • HEADER – file’s header that contains file metadata organized into 3-6 groups:
    • FILE_DESCRIPTION
    • FILE_NAME
    • FILE_SCHEMA
    • FILE_POPULATION
    • SECTION_LANGUAGE
    • SECTION_CONTEXT
  • DATA – application data stored in format that follows EXPRESS data modeling standard; data must follow rules for describing object instances and data mapping.

STEP standard was developed in 1994 roku by ISO, and the latest version is designated as version 3. Third version supports references to external resources, data sharing using compressed archives based on ZIP algorithm, UTF-8 encoding, and use of digital signatures. STEP files can be opened using a text editor as its syntax is to a certain extent human-readable. STEP files also use extensions such as STP and P21.

Conversion of a STEP file

When you install one of the applications from the list of programs that you found here, you should be able to open or edit the file with the STEP extension without any issue. However, if you still have problems with this, you may use the option of STEP file conversion to a different format.

File Conversions from STEP extension to a different format
File conversions from other format to STEP file

We hope we helped you solve the problem with the STEP file. If you do not know where you can download the application from our list, click on the link (which is the name of the program) - you will find more information there on the location where to download the secure setup version of the required application.

What else may cause problems?

There can be more reasons which determine that you are not able to open the STEP file (apart from the lack of the proper application installed).

First - the STEP file may be incorrectly associated with the application installed to support it. In this case, you need to change this association by yourself. To do this, right-click on the STEP file that you want to edit, click "Open with" and then select the program from the list that you have installed. After this operation, the problems with opening the STEP file should be solved.

Second - the file you want to open can simply be damaged. Then, the best solution is to find a new version of given file, or download it again from the same source as before (maybe for some reason in the previous session the download of the STEP file has not been completed and it cannot be opened properly).

Do you want to help?

If you have additional information about the STEP file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on STEP file.

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