A `.XMT_BIN` file is most often handled as a Parasolid binary transmit geometry file containing the real solid and surface definitions from the Parasolid engine, allowing CAD programs to exchange precise model structure in a compact binary package that favors speed and cannot be inspected in plain text.

In practice, Parasolid transmit files usually come in two interchangeable extension sets: text forms like `.x_t` or `.xmt_txt` and binary forms like `.x_b` or `.xmt_bin`, with `.x_b` being more common today while `.xmt_bin` survives as an alternate naming, and to open one you normally import it into a Parasolid-compatible CAD/CAE tool—renaming `.xmt_bin` to `.x_b` often works when the importer only lists `.x_b` even though both represent the same binary Parasolid idea.

With an `.xmt_bin` file, what you mainly do is import its Parasolid geometry into engineering software, since it stores full solid/surface data rather than meshes or drawings, letting CAD systems such as other Parasolid CAD open it for inspection, dimensioning, drawing creation, and continued modeling, and also allowing CAE tools like other simulators to use it for meshing and analysis.

If you need to share the model with users who can’t open Parasolid reliably, you can convert it via your CAD system into broadly recognized formats such as generic STEP for solids or legacy IGES for surface-heavy data, or into mesh types like STL/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 `. If you're ready to read more about XMT_BIN file viewer look into our web-site. xmt_bin` as a diagnostic export to test whether issues come from the native model or from translation when reimported elsewhere.

To open an `.xmt_bin`, you can either import it as a Parasolid file in a tool that supports Parasolid or rename it if the program only displays `.x_b`, with the import route using File → Open/Import under the Parasolid file type so the geometry loads correctly, and the rename route copying `file.xmt_bin` to `file.x_b` so the UI accepts it even though both extensions map to the same binary Parasolid transmit data.