STP 3D Model — A .stp file is a STP 3D Model. It is a 3D model format used to store meshes, scenes and printing geometry.
Quick facts
What is .stp
A .stp file is a STP 3D Model. It is a 3D model format used to store meshes, scenes and printing geometry.
In the mime-db registry it maps to model/step. When serving .stp over HTTP, set the Content-Type header as shown in Developer info below.
Related entities: it maps to model/step — and is delivered over HTTP via the Content-Type header.
How to open .stp files
Developer info
When served over HTTP, responses should set the following header:
Content-Type: model/step
Common software that reads/writes .stp:
Relation chain
Related extensions
Related MIME types
Common uses
How to edit .stp files
How to create .stp files
Frequently asked questions
Common options include Blender, MeshLab, Autodesk Viewer. You can also open many of these files with built-in viewers or a browser.
Create a new file in any text editor or the app that owns the format and save it with the .stp extension.
model/step is the media type identifier used for .stp files during network transfer (for example in the HTTP Content-Type header).
Sources & standards
Updated 2026-08-18
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