How to convert STEP to STP
- Add your .STEP file - drop it in the box above or click to browse.
- Convert it to .STP in a few seconds.
- Download your new .STP file.
What to expect
- The file starts with the literal line
ISO-10303-21;- opening it in a text editor confirms it is valid STEP/STP data regardless of the extension used. - Some operating systems hide extensions by default; enable their display before renaming so you change only the suffix and not the full filename.
- If you need to convert STEP geometry to a triangle mesh for 3D printing, that is a different task - look for a STEP to STL converter instead.
Frequently asked questions
Is there any difference between a .step file and a .stp file?
No. Both contain the same ISO 10303-21 data encoded the same way; the extension difference is purely historical, dating to DOS-era three-character limits.
Do I need special software to make this change?
No. Any file manager on Windows, macOS, or Linux can rename a file extension in a few seconds.
Will renaming the file break it?
No. The extension is a label for the operating system; the actual geometry and structure inside the file are untouched by renaming.
My upload form only accepts .stp but I have a .step file - what should I do?
Rename the file to
.stp and upload it; the content is identical and the receiving system will parse it the same way.Programs that convert STEP: AutoCAD · CATIA · Creo Parametric · ZEMAX · TurboCAD · TurboCAD for Mac · AutoCAD for Mac
