A `.XMT_BIN` file is generally used as a Parasolid "binary transmit" format, which holds real model geometry and topology in the Parasolid kernel’s exchange form instead of mesh or drawing data, allowing CAD programs that use Parasolid to share accurate geometry through a binary snapshot optimized for speed and unreadable as
plain text.
In everyday use, Parasolid transmit formats appear in two main extension groups—text (`.x_t`, `.xmt_txt`) and binary (`.x_b`, `. If you are you looking for more info about
universal XMT_BIN file viewer look at the web site. xmt_bin`)—with `.x_b` being today’s standard and `.xmt_bin` remaining an alternate tag, and you open such files by importing them into a CAD/CAE tool that supports Parasolid; if it only filters `.x_b`, renaming `.xmt_bin` to `.x_b` generally allows the program to load it because the internal structure is the same.
With an `.xmt_bin` file, the key use is bringing its Parasolid solid/surface data into engineering software, since it holds real model geometry instead of mesh or drawing information, letting you open it in CAD to review shapes, measure, generate drawings, or keep modeling inside apps like Siemens NX, and likewise load it into CAE tools such as similar simulators for meshing and simulation.
If you need to share the model with users who don’t work well with Parasolid files, you can convert it via your CAD system into broadly recognized formats such as STEP AP242 for solids or legacy IGES for surface-heavy data, or into mesh types like OBJ for printing or visualization at the cost of losing real CAD geometry; you can also clean the model by importing it, using heal/repair tools, and exporting again, and you can use the `.xmt_bin` as a diagnostic export to test whether issues come from the native model or from translation when reimported elsewhere.
The two simplest ways to open an `.xmt_bin` file are either importing it directly as a Parasolid file in software that already supports Parasolid or renaming it to a more commonly accepted Parasolid-binary extension when the file picker is being strict, with the first method using File → Open/Import and selecting Parasolid to load the solid/surface model properly, and the second method involving copying and renaming the file to `.x_b` so programs that hide `.xmt_bin` still accept it as the same binary Parasolid format.
