File Format Research

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When trying to figure out the structure of a new type of a file, you must first do research. Here's some useful sites we have found for deciphering files.

See if there's existing code:

  • Github - Good place to search for "magic" values. Usually four bytes, search for the decimal and hexadecimal values both big and little endian.

Existing file format description:

  • Library of Congress - Librarians are fighting a battle of being able to read old digital files. Paper is easy, bits are not.
  • Microsoft Protocols - Microsoft has released documentation on a lot of their file formats.