Data Compression


Criteria

Survey Formats

Basics

Compression Methods

Data Formats

Files

Audio Data

Image Data

Video Data


Glossary

Index


Download


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File Name Extensions


The following file extensions are generally in use, typically consisting of three letters as derived from DOS naming conventions:


Ext. Type Meaning Annotations
7z compr. files 7-Zip native format of 7-Zip (Freeware)
ai graphics Adobe Illustrator native format of Adobe
aif audio Audio Interchange File especially for Mac and SGI
Motorola Byte Ordering
arj compr. files    
avi audio
video
Audio Video Interleaved standard video format for Windows
bak arbitrary BAcKup backup copies
bat text BATch batch files
commonly ASCII or ANSI text
bin data BINary File binary data, "BLOBs"
bmp picture BitMaP MS Windows, OS/2
bz compr. file BZip2 file compressed in the BZIP2 format
BZIP2 [BZIP2]
bz2 compr. file BZip2 file compressed in the BZIP2 format
BZIP2 [BZIP2]
cab data CABinet Microsoft
com program COMmand MS DOS
cfg text ConFiG configuration files
cgi text Common Gateway Interface script files
class text java CLASS  
cpp text C++ C++ source code
dll program Dynamic Link Library Windows
doc text DOCument MS Word, WordPerfect, WordStar
drv program DRiVer device driver
dxf graphics Data eXchange File AutoCad
exe program EXEcutable MS Windows, DOS
fh5 graphics FreeHand 5 Macromedia Freehand 5.x
fh7 graphics FreeHand 7 Macromedia Freehand 7.x
fh8 graphics FreeHand 8 Macromedia Freehand 8.x
gif picture Graphic Interchange Format GIF [GIF]
gz compr. file GZip native format of GZIP
especially Unix
GZIP [GZIP]
hex files   BinHex encoded files incl. resource info (MacOS)
hqx files   BinHex encoded files incl. resource info (MacOS)
hlp   HeLP help files, especially Windows
htm text HyperText Markup language  
html text HyperText Markup Language  
ico picture ICOn Microsoft Windows icon file
ini text INItilization initilazation data, mostly text
j2k picture Joint photographic experts group 2000 JPEG-2000 picture
jar program Java ARchive compressed java applets
jif picture Jpeg Interchange Format JPEG picture
JPEG [JPEG]
jff picture Jpeg File interchange Format JPEG picture
JPEG [JPEG]
jng picture Jpeg Network Graphics file format basing on JPEG, equivalent to PNG, but not compatible to JPEG file formats
JPEG [JPEG]
jp2 picture Joint Photographic experts group 2000 JPEG-2000 picture
jpeg picture Joint Photographic Experts Group JPEG picture
JPEG [JPEG]
jpg picture Joint Photographic experts Group JPEG picture
JPEG [JPEG]
lib data LIBrary library file; contents or program
log data LOG log data; commonly text
lzh compr. files   native format of LHA and LHARC
lnk text LiNK links, MS Windows
mid data MIDi Midi data
mov audio
video
MOVie general for video; also usable for MPEG
MPEG [MPEG]
mp2 audio MPeg 2 MPEG 1 Layer II
MPEG-1 Audio [MPEG-1 Audio]
mp3 audio MPeg 3 MPEG 1 Layer III
MPEG-1 Audio [MPEG-1 Audio]
mpg audio
video
Motion Picture expert Group MPEG [MPEG]
mpeg audio
video
Motion Picture Expert Group MPEG [MPEG]
ora data ORAcle Oracle configuration data
out data   default extension of BUNZIP2 or "BZIP2 -d" respectively
BZIP2 [BZIP2]
pdf hybrid data Portabel Document Format according to Adobe Acrobat; text, fonts, graphics, etc.
pgp data Pretty Good Privacy encrypted data
png picture Portable Network Graphics  
ps graphics PostScript  
psp picture Paint Shop Pro  
ppt data Power PoinT Microsoft Power Point presentation
qt audio
video
Quick Time movie  
qtm audio
video
Quick Time Movie  
qxd Layout Quark Xpress Document  
rtf text Rich Text Format ASCII text plus formats in a special ASCII notation
scr program SCReensaver screen saver Windows
sgml text Standard Generalized Markup Language  
sea compr. files Self Exracting Archive  
sit compr. files STuffIt  
tar Dateien Tape ARchive sequential collection of uncompressed files
tar.gz compr. files Tape ARchive.GZib TAR archive compressed by GZIP ("Tarball")
GZIP [GZIP]
taz compr. files TAr gZip TAR archive compressed by GZIP ("Tarball")
GZIP [GZIP]
tbz compr. files Tar BZip2 TAR-file compressed in the BZIP2 format
BZIP2 [BZIP2]
tbz2 compr. files Tar BZip2 TAR-file compressed in the BZIP2 format
BZIP2 [BZIP2]
tga picture TarGA targa file format
tgz compr. files Tar Gzip TAR archive compressed by GZIP ("Tarball")
GZIP [GZIP]
tif picture Tag Image File Format  
tiff picture Tag Image File Format  
tmp data TeMPorary tempory files
ttf Schrift True Type Font especially Windows
txt text TeXT unformatted plain text
uu Dateien UU-Encoded UU encoded data
uue Dateien UU-Encoded UU encoded data
vrml VR Virtual Reality Modelling Language  
wav audio WAVe especially Windows
wmf picture Windows MetaFile  
wp text WordPerfect Document Wordperfect document, especially for older versions
wpd text WordPerfect Document  
xls Tabellen eXceL workSheet MS-Excel file
zip compr. files   ZIP [ZIP]
z compr. files gZip TAR archive compressed by GZIP ("Tarball")
GZIP [GZIP]

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