Wolfram Language File Formats
Wolfram Language code and expressions can be stored in a variety of formats.
"WL" — Wolfram Language source file (.wl, .m)
"NB" — Wolfram Notebook file (.nb)
"WXF" — binary serialization format for Wolfram Language expressions (.wxf)
"WDX" — Wolfram optimized data exchange format (.wdx)
"MX" — system-dependent binary dump file (.mx)
"WLNet" — Wolfram neural net format (.wlnet)