Free online STP to STEP converter

How to convert .stp files directly to .step format.

Convert STP to STEP online - free

.stp .step

Drop up to 3 .STP files here or click to browse

Max 10 MB per file · No registration required · max 30 MB total

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How it works

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Upload your .stp file

Click to browse to select your file you want to convert or simply drag & drop your file into selected area.
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Perform .stp to .step conversion

After successful file upload, click to convert when you are ready.
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Download converted .step file

Conversion result is ready to download.

Conversion statistics: STP to STEP

STP files are most often converted to DWG 38% IFC 15% IGS 14% DXF 10%

Updated November 10, 2026, from conversions on 101convert.com

How to convert stp to step file

September 30, 2026
CAD formats
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Converting STEP 3D CAD Files directly to STEP 3D Models (.stp to .step conversion) is redundant, since STP and STEP files are basically the same CAD files based on ISO-10303.

Should you really need it, you can simply rename the file's suffix from .stp to .step. No further conversion is necessary.

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Understanding STP and STEP file formats

The STP file format, also known as STEP (Standard for the Exchange of Product Data), is a widely used file format for 3D model data exchange. It is an ISO standard (ISO 10303) that allows different CAD (Computer-Aided Design) software to share data seamlessly. The terms STP and STEP are often used interchangeably, as they refer to the same file format.

Why convert STP to STEP?

Since STP and STEP are essentially the same, converting between them is often unnecessary. However, some software may recognize one extension over the other, necessitating a simple file extension change. This conversion ensures compatibility and smooth data exchange between different CAD systems.

Best software for STP to STEP conversion

To convert an STP file to a STEP file, you can use various CAD software that supports these formats. Here are some recommended options:

Autodesk Fusion 360: A powerful CAD tool that allows you to open STP files and save them as STEP files. Navigate to File → Export → STEP to perform the conversion.
SolidWorks: Another popular CAD software that supports STP and STEP formats. Use the File → Save As option and select STEP as the file type.
FreeCAD: An open-source CAD software that can handle STP to STEP conversion. Open the STP file and use File → Export to save it as a STEP file.

Conclusion

Converting between STP and STEP is straightforward, as they are essentially the same format. Using the right CAD software, you can ensure compatibility and seamless data exchange between different systems.

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STP vs STEP: format comparison

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

Comparison of the STP and STEP file formats
Property	.STP STEP (Standard for the Exchange of Product model data)	.STEP Standard for the Exchange of Product model data
Dimensions	3D	3D
Geometry	Both	Both
Materials	Limited	Yes
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 STP file Open STEP file

Information about file extensions and file types is provided by File-Extensions.org

Frequently asked questions

Is the STP to STEP converter free?

Yes, converting STP to STEP on 101convert.com is completely free. No registration, email address or installation is required. If you need a higher file size limit or want to convert more files at once, see our plans.

How large can my STP file be?

You can upload STP files up to 10 MB and convert up to 3 files at once in a single batch. With a paid plan the limit is up to 100 MB per file and 100 files at once, see our plans.

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 STP to STEP?

No. The STP to STEP 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 STP file for this STP to STEP 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
stp file conversion

Reverse conversion

step to stp

Convert to step from
other formats

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Free online STP to STEP converter