Categories

• Archive(15)
• Audio(389)
• Compression(4)
• Conversion(70)
• Database(4)
• Document(205)
• Executable(1)
• File Systems(35)
• Fonts(294)
• Games(2)
• Graphics(174)
• Hardware_Description_Languages(55)
• Help(12)
• MIME Types(3)
• Markup Languages(966)
• Metadata(174)
• Microformats(17)
• Open Standards(29)
• Personal Information(11)
• Style Sheets(214)
• Video(2)

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Also See

• Character Encoding(112)
• File Formats(6)
• Protocols(814)

Sites

• Almost Every File Format in the World--http://www.ace.net.nz/tech/TechFileFormat.html
  Names many file formats and their extensions.
• DaubNET File Format Collection--http://www.daubnet.com/en/file-formats
  The full specifications of various file formats.
• Dot What?!--http://dotwhat.net/
  Database of file extension information. Supports users comments and submissions. Includes discussion forum.
• File Formats Magic Database--http://www.magicdb.org/
  Contains information on main file formats as well as an FFID registry and a signature file permitting the identification of files from their contents. Also contains tips on how to design new file formats.
• File-Extensions.org--http://www.file-extensions.org/
  Searchable file extension list including descriptions and associated applications.
• FileInfo.com--http://www.fileinfo.com/
  Database of file extensions with information about each file type.
• Filerecon Project--http://www.computec.ch/projekte/filerecon/
  Developing a program to automatically identify files from their content. Project news, FAQ, and download. [GPL]
• FileSuffix.com--http://www.filesuffix.com/
  A searchable filename extension database.
• FILExt--http://filext.com/
  Searchable database of file extensions for data formats, with information and notes on each.
• Macintosh Type/Creator Database--http://homepage.mac.com/tcdb/
  A database of windows file extension codes with correlating Macintosh Type/Creator code pairs.
• Sustainability of Digital Formats Planning for Library of Congress Collections--http://www.digitalpreservation.gov/formats/
  Provides information about digital content formats from the viewpoint of maintaining sustainable and accessible archives.
• UK National Archives PRONOM Technical Registry--http://www.nationalarchives.gov.uk/PRONOM/
  Resource for those requiring definitive information about the file formats, software products and other technical components required to support long-term access to electronic records.
• Uniblue File Extension--http://www.file-extension.com/
  Searchable database of file extensions, explaining what they are used for and which programs they are associated with.
• Webopedia - Data Formats--http://webopedia.com/Data/Data_Formats/
  Contains information about many data formats.
• Wotsit's Format--http://www.wotsit.org/
  Detailed file formats and data formats for programmers. A large collection of programming resources with detailed information.