X_B 3D Model — A .x_b file is a X_B 3D Model. It is a 3D model format used to store meshes, scenes and printing geometry.
Quick facts
What is .x_b
A .x_b file is a X_B 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/vnd.parasolid.transmit.binary. When serving .x_b over HTTP, set the Content-Type header as shown in Developer info below.
Related entities: it maps to model/vnd.parasolid.transmit.binary — and is delivered over HTTP via the Content-Type header.
How to open .x_b files
Developer info
When served over HTTP, responses should set the following header:
Content-Type: model/vnd.parasolid.transmit.binary
Common software that reads/writes .x_b:
Relation chain
Related extensions
Related MIME types
Common uses
How to edit .x_b files
How to create .x_b 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 .x_b extension.
model/vnd.parasolid.transmit.binary is the media type identifier used for .x_b files during network transfer (for example in the HTTP Content-Type header).
Sources & standards
Updated 2026-08-18
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