This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)
Mathematica Import/Export Format


Sequence of bytes.
Raw binary format.
Equivalent to the UnsignedInteger8 format.
  • Import can read any file as a sequence of unsigned 8-bit integers.
  • Export writes a list of integers in the range (0, 255) to a binary file.
  • Import["file", "Byte"] imports any file, returning a packed array of integers in the range (0, 255).
  • Export["file", list, "Byte"] exports a list of integers in the range (0, 255) to file.
  • Import["file", {"Byte", elem}] or Import["file", elem ] imports the specified element from file.
  • Import["file", {"Byte", {elem1, elem2, ...}}] imports multiple elements.
  • See the reference pages for full general information on Import and Export.
"Elements" elements and options available in this file
"Rules"full rules for each element and option
"Options"rules for options, properties, and settings
  • Data representation element:
"Data"list of integers in the range (0, 255)
  • Import["file", {"Byte", n}]gives the n^(th) byte from file.
"HeaderBytes"0how many bytes to skip at the beginning of the file