textually expands name to have the form of an absolute file name for your operating system.


  • ExpandFileName["name"] interprets name relative to your current directory.
  • ExpandFileName expands directory designations such as . and ...
  • The result from ExpandFileName has the form of an absolute file name, with standard pathname separators appropriate for your operating system.
  • ExpandFileName just operates on names of files; it does not actually search for the file specified.
  • ExpandFileName[File["name"]] is also supported.
  • ExpandFileName[URL["file:///path"]] converts a file-based URL to an absolute file name.


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Basic Examples  (2)

Convert the relative directory path to the full name:

Reset the directory to the previous directory:

Expand the file name specified by the File object:

Scope  (1)

Convert a file scheme URL to an absolute path:

Take the file name from a local object:

Applications  (1)

Convert the local base URL to an absolute path name:

Introduced in 2008
Updated in 2016