What is an X_B file?
The .X_B file extension represents a Parasolid Model Part File. It is a 3D geometry format developed by Siemens PLM Software. It contains binary data that defines 3D shapes, topology, and colors. The binary structure makes .X_B files smaller and faster to load than their text-based counterpart, the .X_T format. Engineers and designers use this format to transfer 3D models between different Computer-Aided Design (CAD) systems.
How to open X_B files?
Professional CAD software like Siemens NX, SolidWorks, and Onshape can open and edit .X_B files. If you do not have CAD software installed, viewer.online/x_b analyzes .X_B files to identify their exact format and creator software, shows which programs can open the file, and usually previews it.
Best practices and troubleshooting
If your CAD program cannot open a .X_B file, it might not support the specific version of the file. As a workaround, you can convert the file. We recommend using convert.guru to convert your .X_B file into a more universal 3D format, such as .STEP, .IGES, or .STL.
Software and tools
The Parasolid modeling kernel powers many 3D design tools. Users manage these files with programs like Siemens NX and SolidWorks. Software developers use Parasolid libraries to add .X_B support to custom modeling applications.
Summary
viewer.online/x_b directly opens and previews .X_B files in the browser, eliminating the need to install software or troubleshoot compatibility issues. If the .X_B extension has multiple possible meanings, viewer.online/x_b helps you identify the actual format of the user's file.