Free online STEP to STP converter

Conversion of STEP product data to STP. STEP to STP converters.

Convert STEP to STP online - free

.step .stp

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How to convert step to stp file

June 7, 2026
CAD formats
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Considering step and stp are just a variant of the same ISO STEP file type, there is really no need for step to stp conversion of any kind. Should you wish to, you can just rename step to stp, but any modern software that supports STEP format should be able to recognize these files regardless of their actual file extension.

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Understanding STEP and STP file formats

STEP and STP are both file formats used for 3D modeling and CAD (Computer-Aided Design) data exchange. STEP stands for Standard for the Exchange of Product Data, and it is an ISO standard (ISO 10303) that allows for the exchange of 3D model data between different CAD systems. STP is essentially the same as STEP, as it is a file extension used interchangeably with STEP files. Both formats are widely used in industries such as engineering, architecture, and manufacturing for sharing complex 3D models.

How to convert STEP to STP

Since STEP and STP are essentially the same format, converting between them is straightforward. You can simply rename the file extension from .step to .stp or vice versa. However, if you prefer using software for conversion, many CAD programs offer this functionality.

Best software for STEP to STP conversion

One of the best software options for converting STEP to STP is Autodesk Fusion 360. This software supports a wide range of CAD file formats and provides an easy way to convert between them. To convert a STEP file to STP in Fusion 360, follow these steps:

Open Autodesk Fusion 360.
Go to File → Open and select your STEP file.
Once the file is open, go to File → Export.
Choose the STP format from the list of available formats.
Click Export to save the file as an STP file.

Other software options include SolidWorks, CATIA, and FreeCAD, all of which support STEP and STP file formats and offer similar conversion capabilities.

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STEP vs STP: format comparison

How the STEP and STP formats compare on the properties that matter most for this conversion.

Comparison of the STEP and STP file formats
Property	.STEP Standard for the Exchange of Product model data	.STP STEP (Standard for the Exchange of Product model data)
Dimensions	3D	3D
Geometry	Both	Both
Materials	Yes	Limited
Plain-text readable	Yes	Yes
Operating system support	Wide	Wide
Typical file size	Medium	Medium
Open standard	Yes	Yes
Introduced	1994	1994
Developer	ISO	ISO
MIME type	application/step	—

Open STEP file Open STP file

Suggested software and links: step to stp converters

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TurboCAD for Mac

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ViaCAD Pro

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ZEMAX

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Frequently asked questions

Is the STEP to STP converter free?

Yes, converting STEP to STP on 101convert.com is completely free. No registration, email address or installation is required.

How large can my STEP file be?

You can upload STEP files up to 500 MB and convert up to 5 files at once in a single batch.

What happens to my uploaded files?

Files are processed automatically and deleted from our servers within a few minutes after conversion. We never view or share your files.

Do I need to install any software to convert STEP to STP?

No. The STEP to STP conversion runs entirely online in your browser and works on Windows, Mac, Linux, Android and iPhone.

Did the conversion fail?

In most cases, the cause is an incorrect file format. Please upload a valid STEP file for this STEP to STP conversion. Occasionally, the issue may be on our side. We analyze recurring conversion failures and disable or fix the converter if we detect a defect.

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Additional formats for
step file conversion

Reverse conversion

stp to step

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