How to Convert X_T to STL
Parasolid X_T files require export to STEP first, then use our free STEP to STL converter. Works with NX, SolidWorks, and Fusion 360.
Ready to Convert?
Export your X_T to STEP in your CAD software, then use our free STEP to STL converter.
Open STEP to STL Converter3 Steps to Convert X_T to STL
Open in CAD Software
Open your .x_t file in a Parasolid-based CAD application (NX, SolidWorks, Fusion 360). X_T is Siemens' Parasolid format.
Export as STEP
Go to File > Export and select STEP (.step or .stp) format. STEP preserves the precise geometry from Parasolid.
Convert STEP to STL
Upload the exported .step file to our free STEP to STL converter. Download the STL for 3D printing.
X_T vs STL Format Comparison
| Feature | X_T | STL |
|---|---|---|
| Full name | Parasolid Text | Standard Triangle Language |
| Maintained by | Siemens PLM | Industry standard (1987) |
| Structure | Proprietary text | Raw triangle list |
| Geometry type | Precise (B-rep) | Triangle mesh |
| Parametric data | Yes | No |
| Software support | NX, SolidWorks, Fusion 360 | All slicers |
| Primary use | CAD modeling | 3D printing |
| Open format | No (proprietary) | Yes |
What Is an X_T File?
X_T is the text version of the Parasolid format, developed by Siemens PLM Software. Parasolid is the geometric modeling kernel used by major CAD systems including NX, SolidWorks, and Fusion 360.
X_T files store precise B-rep solid geometry — exact mathematical surfaces, not approximated triangles. This makes them ideal for engineering and manufacturing, where dimensional accuracy is critical.
Last updated: August 2026. Format details reference the Parasolid overview and the STL format overview.
Frequently Asked Questions
Can I convert X_T to STL online?
Not directly. X_T is Siemens' Parasolid format and cannot be parsed by browser-based converters. Export to STEP in your CAD software, then use our free STEP to STL converter.
What software can open X_T files?
X_T files can be opened by Parasolid-based CAD software: Siemens NX, SolidWorks, Fusion 360, and some versions of AutoCAD. Free options include FreeCAD with the Parasolid import addon.
How do I convert X_T to STL in SolidWorks?
In SolidWorks, open the .x_t file (File > Open). Then go to File > Save As and select STL (.stl) format. Alternatively, save as STEP and use our online converter.
Is there a free X_T to STL converter?
FreeCAD (free open-source) can import some X_T files via the ODA converter. After import, export as STL. If FreeCAD cannot open your X_T, use Fusion 360 (free for hobbyists) to open and export.
Can I convert X_T to STL on Mac?
Fusion 360 has a Mac version and can open X_T files. Export to STEP in Fusion 360, then use our online STEP to STL converter on Mac.
What is X_T file format?
X_T is the Parasolid text format developed by Siemens PLM Software. Parasolid is the geometric modeling kernel used by NX, SolidWorks, Fusion 360, and other major CAD systems. X_T stores precise B-rep solid geometry.
Why can't I convert X_T directly in the browser?
X_T requires the Parasolid kernel to interpret. No open-source parser can read X_T files reliably. STEP export from a Parasolid-based CAD application is the standard interchange path.
What is the difference between X_T and STEP?
X_T is Siemens' proprietary Parasolid format. STEP (ISO 10303) is a vendor-neutral standard. Both store precise B-rep geometry, but STEP is universally supported while X_T requires Parasolid-based software.
Can Fusion 360 open X_T files?
Yes. Fusion 360 uses the Parasolid kernel and can open X_T files directly. In Fusion 360, use File > Open and select the .x_t file. Then export as STEP or STL.
Can FreeCAD open X_T files?
FreeCAD can import some X_T files via the ODA (Open Design Alliance) converter plugin. Success depends on the file version. If FreeCAD cannot open your file, use Fusion 360 or SolidWorks.
Is X_T the same as X_B?
No. X_T is the text version of Parasolid format. X_B is the binary version. Both contain the same geometric data but X_B is more compact. Most CAD software supports both.
Does converting X_T to STL preserve accuracy?
Yes. When you export X_T to STEP, all geometric precision is preserved. Converting STEP to STL tessellates the surfaces into triangles with configurable resolution.