How do I open a .STP file on Windows or Mac?

You can open .STP files using SolidWorks, Autodesk Fusion 360, Autodesk Inventor, FreeCAD, Onshape, Siemens NX. If you do not have native software installed, you can use OpenAnyFile's free File Identifier or convert .STP to a standard format in your browser.

Is a .STP file safe to open?

This format carries a safety rating of Low Risk. Exact equivalent to .STEP extension; interchangeable across all major 3D CAD tools

Can I convert a .STP file to other formats?

Yes! .STP can be converted to formats such as .STL, .DWG, .OBJ directly in your web browser.

What should I do if a .STP file is corrupted or won't open?

If your .STP file displays an invalid header or signature error, check its magic bytes hex header (Varies) using OpenAnyFile's Magic Byte Detector or follow our step-by-step file repair guide.

How do I open .STP files?

You can open .STP files using SolidWorks, Autodesk Fusion 360, Autodesk Inventor, FreeCAD, Onshape, Siemens NX.

CAD & 3D • MIME: application/step

.STP – STP File Format

Q: What is a .STP file?

A .STP file is a STP File Format associated with CAD & 3D. STP is the shorthand file extension for ISO 10303 STEP files, preserving high-precision parametric B-Rep solid geometry and assembly hierarchies for 3D engineering.

STP is the shorthand file extension for ISO 10303 STEP files, preserving high-precision parametric B-Rep solid geometry and assembly hierarchies for 3D engineering.

Primary Category CAD & 3D

MIME Type application/step

Magic Bytes Signature Varies

Security Risk Rating Low Risk

Recommended Software to Open .STP

SolidWorks

windows, mac, linux • Free

Autodesk Fusion 360

windows, mac, linux • Free

Autodesk Inventor

windows, mac, linux • Free

FreeCAD

windows, mac, linux • Free

Onshape

windows, mac, linux • Free

Siemens NX

windows, mac, linux • Free