There are a huge number of different computer file formats available - here we describe some of the most popular - Click on a file extension for more detailed information.

If you want to convert a file from one format to another we make that super-easy to do at Zamzar - just upload your file and let us do all the hard work. Zamzar supports conversion between most of the formats below !

We're adding support for new formats all the time - if there's a format that you'd like us to support why not contact us and we'll do our best to add it.

Document file formats	(Back to top)
File format	Author	What programs use it ?
csv - Comma Separated Values	Microsoft	The CSV file format is very simple and supported by almost all spreadsheets and database management systems
djvu - DjVu File	AT&T Labs - Research	DjVuLibre DjView LizardTech Browser Plug In MacDjView Desktop Viewer WinDjView
doc - Microsoft Word Document	Microsoft	AbiWord Apple Pages AppleWorks KWord Microsoft Word StarOffice
docx - Microsoft Word 2007 Document	Microsoft	Microsoft Word 2007 Microsoft Word 2008 (MAC) OxygenOffice Professional (Linux) Word 2010
eml - E-Mail	Microsoft	Apple Mail IncrediMail Microsoft Outlook Microsoft Windows Live Mail Mozilla Thunderbird
eps - Encapsulated PostScript	Adobe Systems	Adobe Acrobat Adobe Illustrator Adobe Photoshop CorelDRAW Microsoft Digital Image Editor QuarkXPress
html - Hypertext Markup Language	World Wide Web Consortium & WHATWG	Any Web Browser (e.g. Internet Explorer, Safari, Firefox, Google Chrome)
html4 - Hypertext Markup Language	World Wide Web Consortium & WHATWG	Any Web Browser (e.g. Internet Explorer, Safari, Firefox, Google Chrome)
html5 - Hypertext Markup Language	World Wide Web Consortium & WHATWG	Any Web Browser (e.g. Internet Explorer, Safari, Firefox, Google Chrome)
json - JavaScript Object Notation	Douglas Crockford	Google Chrome Microsoft Notepad Microsoft WordPad Mozilla Firefox TextWrangler
key - Apple iWork Keynote Presentation	Apple Inc	Apple iWork Keynote 5.1 Keynote 5.2 Keynote 5.3 Keynote 6.0 Keynote 6.1 Keynote 6.2 Keynote 6.5
key09 - Apple iWork '09 Keynote Document	Apple Inc	Keynote 5.0 Keynote 5.1 Keynote 5.2 Keynote 5.3 iWork '09
key.zip - Apple iWork '05-'08 Keynote Presentation	Apple Inc	Apple iWork '05 Apple iWork '08 Keynote 1.0 Keynote 2.0 Keynote 3.0 Keynote 4.0
mdb - Microsoft Access Database	Microsoft	MDB Viewer Plus Microsoft Access
mpp - Microsoft Project Document	Microsoft	Microsoft Project
msg - Encapsulated email message	Microsoft	Encryptomatic MsgViewer Pro Microsoft Outlook Priasoft MSG File Viewer and Assessor
numbers - Apple iWork Numbers Spreadsheet	Apple	Apple iWork Numbers 2.1 Numbers 2.2 Numbers 2.3 Numbers 3.0 Numbers 3.5
numbers09 - Apple iWork '09 Numbers Spreadsheet	Apple	Apple iWork Numbers 2.0 Numbers 2.1 Numbers 2.2 Numbers 2.3
numbers.zip - Apple iWork '08 Numbers Spreadsheet	Apple Inc	Apple iWork '05 Apple iWork '08 Numbers 1.0
odp - OpenDocument presentation	Sun Microsystems and Oasis	Corel WordPerfect KOffice Lotus Symphony NeoOffice OpenOffice Impress StarOffice
ods - OpenDocument spreadsheet	Sun Microsystems	Microsoft Office 2007 Microsoft Office 2010 OpenOffice Calc
odt - OpenDocument text	Sun Microsystems	Microsoft Office 2007 Microsoft Office 2010 OpenOffice Writer
pages - Apple iWork Pages Document	Apple Inc	Apple iWork Pages 4.1 Pages 4.2 Pages 4.3 Pages 5.0 Pages 5.1 Pages 5.2 Pages 5.5
pages09 - Apple iWork '09 Pages Document	Apple Inc	Pages 4.0 Pages 4.1 Pages 4.2 Pages 4.3 iWork '09
pages.zip - Apple iWork '05-'08 Pages Document	Apple Inc	Apple iWork '05 Apple iWork '08 Pages 1.0 Pages 2.0 Pages 3.0
pdf - Portable Document Format	Adobe Systems	Adobe Viewer Ghostscript Ghostview Xpdf gPDF
pps - Microsoft PowerPoint Presentation	Microsoft	Apple Keynote Microsoft PowerPoint OpenOffice
ppsx - Microsoft PowerPoint 2007 Slide Show	Microsoft	Apple Keynote Microsoft PowerPoint OpenOffice
ppt (1997-2003) - Microsoft PowerPoint Presentation
ppt - Microsoft PowerPoint Presentation	Microsoft	Apple Keynote Microsoft PowerPoint OpenOffice
pptx - Microsoft PowerPoint 2007 Presentation	Microsoft	Apple Keynote Microsoft PowerPoint OpenOffice
ps - PostScript	Adobe Systems	Adobe Acrobat Adobe Photoshop Quark Xpress
pst - Personal Folder File
pub - Microsoft Publisher	Microsoft	Microsoft Publisher
rtf - Rich Text Format	Microsoft	AbiWord Kword Microsoft Word TextEdit WordPad
swf - Macromedia Flash Format File	FutureWave Software	Adobe Flash Player (standalone program) Web browser with the Flash plug-in installed
txt - Text Document	Various	Notepad TextEdit WordPad
vsd - Visio Drawing	Microsoft	Microsoft Internet Explorer Microsoft Visio Microsoft Visio Viewer
vsdx - Visio 2013 Drawing	Microsoft	Microsoft Visio 2013
wks - Microsoft Works Spreadsheet	Microsoft	Microsoft Works
wpd - WordPerfect Document	Corel	Corel WordPerfect Microsoft Word OpenOffice Writer
wps - Microsoft Works Document	Microsoft	Microsoft Word Microsoft Works Word Processor NeoOffice OxygenOffice Works Converter
xls - Microsoft Excel Spreadsheet	Microsoft	Microsoft Excel Microsoft Excel Viewer OpenOffice
xlsx - Microsoft Excel 2007 Spreadsheet	Microsoft	Microsoft Excel 2007 OpenOffice OxygenOffice Progessional (Linux)
xlr - Works Spreadsheet or Chart (Microsoft Corporation)	Microsoft	Microsoft Works
xml - Extensible Markup Language	World Wide Web Consortium	Chrome Firefox Microsoft Internet Explorer Microsoft Office InfoPath Notepad Oxygen XML Editor Safari
xps - Open XML Paper Specification	Microsoft	Chrome Firefox Microsoft Internet Explorer Microsoft XPS Viewer Safari

Image file formats	(Back to top)
File format	Author	What programs use it ?
3fr - Hasselblad 3F RAW Image	Victor Hasselblad AB	Adobe Photoshop Adobe Photoshop Elements Corel Draw
ai - Adobe Illustrator Artwork	Adobe	Adobe Photoshop Adobe Reader Corel Paint Shop Pro
arw - Sony Alpha Raw	Sony	Adobe Photoshop Adobe Photoshop Elements Corel Draw GIMP Google Picasa XnView
bmp - Windows bitmap	Microsoft	Adobe Photoshop MS Paint Microsoft Photo Editor Paintbrush
cdr - Corel Draw Vector drawing file	Corel Corporation	Adobe Illustrator Adobe Reader Corel PaintShop Photo Pro Corel WordPerfect Office LibreOffice
cr2 - Canon RAW version 2	Canon Inc.	Adobe Photoshop Adobe Photoshop Lightroom Paint Shop Pro Picasa digiKam
crw - Canon RAW CIFF Image File	Cannon	Adobe Photoshop Adobe Photoshop Elements Corel Draw Google Picasa Microsoft Windows Photos
dcr - Kodak RAW Image File	Kodak	Adobe Photoshop Adobe Photoshop Elements Corel Draw Google Picasa
dng - Digital Negative	Adobe	Adobe Photoshop Adobe Photoshop Elements Adobe Photoshop Lightroom Corel Draw Google Picasa
emf - Windows Enhanced Metafile	Microsoft	Microsoft Publisher Microsoft Word QuarkXPress
erf - Epson RAW File	Epson	Adobe Photoshop Adobe Photoshop Elements Corel Draw Epson PhotoRAW
gif - Compuserve graphics interchange	CompuServe	Adobe Photoshop Apple Preview Corel Paint Shop Pro Microsoft Windows Photo Gallery Viewer
ico - Windows Icon	Microsoft	Adobe Photoshop Microsoft Paint Windows Picture and Fax Viewer
jpg - JPEG compliant image	The JPEG Committee	Adobe Photoshop Apple Preview Corel Paint Shop Pro Microsoft Windows Photo Gallery Viewer
mdi - Microsoft Document Imaging	Microsoft	Microsoft Office Imaging
mef - Mamiya RAW Image	Mamiya	Adobe DNG Converter Adobe Photoshop Adobe Photoshop Elements Corel Draw
mrw - Minolta RAW	Minolta	Adobe Photoshop Adobe Photoshop Elements Apple Photos Corel Draw Google Picasa Microsoft Windows Photos
nef - Nikon Electronic Format	Nikon Inc.	Adobe Photoshop Adobe Photoshop Lightroom Paint Shop Pro Picasa digiKam
odg - OpenDocument Drawing	Sun Microsystems	Libre Office OpenOffice Draw
orf - Olympus RAW Image file	Olympus	Adobe Photoshop Adobe Photoshop Elements Corel Draw Google Picasa Olympus Master
pcx - Paintbrush Bitmap Image	ZSoft Corporation	Adobe Photoshop Microsoft Paint Windows Picture and Fax Viewer
pef - Pentax RAW file	Pentax	Adobe Photoshop Adobe Photoshop Elements Corel Draw Google Picasa
png - Portable Network Graphic	PNG Development Group	Apple Preview Corel Paint Shop Pro GIMP - The GNU Image Manipulation Program (LINUX) Microsoft Windows Photo Gallery Viewer Safari
ppm - Portable Pixmap file	Jef Poskanzer	Adobe Photoshop Corel Draw GIMP Netpbm
psd - Photoshop Document	Adobe Systems	Adobe Illustrator CS6 Adobe InDesign CS6 Adobe Photoshop GIMP
raf - Fuji RAW Image File	Fuji	Adobe Lightroom Adobe Photoshop Adobe Photoshop Elements Corel Draw Google Picasa
raw - RAW Image File	Various	Adobe Photoshop Adobe Photoshop Elements Apple Preview Corel Draw Google Picasa
sr2 - Sony RAW Image File	Sony	Adobe DNG Converter Corel Draw Microsoft Windows Photos XnViewMP
svg - Scalable Vector Graphics	World Wide Web Consortium	Adobe Photoshop Apple Preview Corel Paint Shop Pro Corel SVG Viewer
tga - Truevision Targa Graphic	Truevision	Adobe Photoshop Corel Paint Shop Pro GIMP Painter
thumbnail - Thumbnail image
tiff - Tagged image file format	Aldus, Adobe Systems	CyberLink PowerDVD InterVideo WinDVD VideoLAN VLC Media Player Windows Media Player
wbmp - Wireless Bitmap File Format	WAP Forum	Adobe Photoshop Microsoft Paint Windows Picture and Fax Viewer
webp - Lossily compressed image file	Google	Adobe Photoshop Google Chrome Picasa
wmf - Windows Metafile	Microsoft	Microsoft Publisher Microsoft Word QuarkXPress
x3f - Sigma Camera RAW Picture File	Sigma & Foveon Inc.	Adobe Photoshop Corel Draw Google Picasa
xcf - eXperimental Computing Facility	eXperimental Computing Facility of the University of California at Berkeley	CorelDraw GIMP XnViewMP

Audio file formats	(Back to top)
File format	Author	What programs use it ?
3ga - 3GA Multimedia File	3rd Generation Partnership Project (3GPP)	QuickTime Player VLC Media Player Windows Media Player
aac - Advanced Audio Coding File	A combination of Fraunhofer IIS, AT&T Bell Laboratories, Dolby and Sony Corporation	KMPlayer RealPlayer VideoLAN VLC Media Player Windows Media Player iTunes
ac3 - AC3 Audio File	Dolby Digital	QuickTime Player VLC Media Player Windows Media Player
aifc - Audio Interchange File Format Compressed	Apple Inc	Apple QuickTime VLC media Player Winamp Windows Media Player
aiff - Audio Interchange File Format	Apple Inc	Apple QuickTime VLC media Player Winamp Windows Media Player
amr - Adaptive Multi-Rate Audio Codec	3rd Generation Partnership Project (3GPP)	Apple QuickTime Realplayer VLC media Player Winamp
ape - Monkeys Audio	Monkeys Audio	APE Player VLC media Player
caf - Core Audio Format	Apple Inc	Apple QuickTime VLC media Player
flac - Free Lossless Audio Codec	Xiph.Org Foundation	Real Player VLC Media Player Windows Media Player
m4a - Compressed video file	Apple	Apple QuickTime Player Apple iTunes Microsoft Windows Media Player
m4b - MPEG-4 Audio Layer Bookmarkable File	Apple	Apple QuickTime Player Apple iTunes
m4r - iPhone Ringtone File	Apple	Apple QuickTime Player Apple iTunes
midi - Musical Instrument Digital Interface	Various	Audio Evolution GarageBand Master Tracks Pro Sonar
mp3 - Compressed audio file	Moving Picture Experts Group	RealOne WinAmp Windows Media Player iTunes
oga - Ogg Audio Only File	Xiph.Org Foundation	Apple QuickTime Player Real Player Windows Media Player
ogg - Ogg Vorbis Compressed Audio File	Xiph.Org Foundation	Apple QuickTime Player Real Player Windows Media Player
ra - RealMedia Streaming Media	Real Networks	RealNetworks RealPlayer
ram - RealMedia Metafile	Real Networks	RealNetworks RealPlayer
rm - RealMedia Streaming Media	Real Networks	RealNetworks RealPlayer
wav - Windows audio file	Microsoft & IBM	CyberLink PowerDirector Microsoft Windows Media Player Roxio Creator 2009
wma - Windows Media Audio	Microsoft	MPlayer Realplayer VLC Media Player Windows Media Player Windows Movie Maker

Video file formats	(Back to top)
File format	Author	What programs use it ?
264 - H.264 Raw Files	International Telecommunications Union and International Organization for Standardization/International Electrotechnical Commission Moving Picture Experts Group	VideoLAN VLC Media Player
3g2 - 3GPP2 Multimedia File	3rd Generation Partnership Project 2	Apple QuickTime Player GOM Player Microsoft Media Player Classic Totem VideoLAN VLC Media Player
3gp - 3GPP Multimedia File	3rd Generation Partnership Project (3GPP)	QuickTime Player VLC Media Player Windows Media Player
3gpp - 3GPP Multimedia File	3rd Generation Partnership Project (3GPP)	QuickTime Player VLC Media Player Windows Media Player
asf - Advanced Streaming Format	Microsoft	Real Player VLC Media Player Windows Media Player
avi - Windows video file	Microsoft	ALLPlayer Apple QuickTime Player Microsoft Windows Media Player VideoLAN VLC Media Player
f4v - Flash MP4 video	Apple	FFDShow Microsoft Windows Photo Gallery Viewer VideoLAN VLC Media Player Windows Media Player
flv - Flash video	Adobe Systems Incorporated	FFDShow Microsoft Windows Photo Gallery Viewer VideoLAN VLC Media Player Windows Media Player
gvi - Google video file	Google	Google VideoPlayer VideoLAN VLC Media Player Windows MediaPlayer classic
ipad - MPEG-4 (H264) Video File
iphone - MPEG-4 (H264) Video File
ipod - MPEG-4 Video File
m2ts - Blu-ray BDAV Video file	Blu-ray Disc Association	VideoLAN VLC Media Player Windows Media Player
m4v - MPEG-4 Video File	Apple	Apple QuickTime Player Apple iTunes VLC Media Player
mkv - Matroska Multimedia Container	Steve Lhomme	VLC Media Player
mov - Apple QuickTime Movie	Apple	Apple QuickTime Player CyberLink PowerDirector Roxio Easy Media Creator
mod - Hard disk camera movie	JVC/Panasonic	Quicktime Player VLC Media Player Windows Media Player
mp4 - MPEG-4 Video File	Moving Picture Experts Group	Apple QuickTime Player Apple iTunes Microsoft Windows Media Player VideoLAN VLC Media Player
mpg - Moving Picture Experts Group File	ISO, IEC	VideoLAN VLC Media Player Windows Media Player
mts - AVCHD Video File	Sony, Panasonic	VideoLAN VLC Media Player Windows Media Player
rmvb - RealVideo Variable Bit Rate File	RealNetworks	RealPlayer VLC Media Player
ts - Video Transport Stream File	MPEG	VideoLAN VLC Media Player
vob - Video Object File	Apple	Adobe Flash Player (standalone program) Web browser with the Flash plug-in installed
webm - Multimedia Container Format	Google (Previously developed by On2, Xiph, and Matroska)	Google Chrome Mozilla Firefox VLC Media Player
wmv - Windows Media Video	Microsoft	MPlayer Microsoft Windows Media Player PowerDVD RealPlayer VideoLAN VLC Media Player

e-Book file formats	(Back to top)
File format	Author	What programs use it ?
azw - Amazon Kindle eBook File	Amazon	Kindle Reader Kindle for Android Kindle for iOS
azw3 - Amazon KF8 eBook File	Amazon	Kindle Fire Kindle Reader Kindle for Android Kindle for iOS
cbc - eBook Format	Various	Comic Book Collector
cbr - Comic Book RAR Archive	Various	CDisplay ComicFlow Perfect Viewer
cbz - Comic Book Archive File	Various	CDisplay ComicFlow Perfect Viewer
chm - Compiled HTML Help File	Microsoft	Beyond CHM Internet Explorer Microsoft Reader Mozilla Firefox
epub - Open eBook File	International Digital Publishing Forum (IDPF)	Adobe Digital Editions Apple iBooks Mobipocket Reader Desktop Sony Reader
fb2 - FictionBook 2.0 File	FictionBook	Apple iBooks Calibre Cool Viewer
lit - Microsoft eBook File	Microsoft	Microsoft Reader
lrf - Sony Portable Reader File	Sony	Sony Reader
lzh - Compressed Archive File	Haruyasu Yoshizaki	LHA WinRAR WinZip
mobi - Mobipocket eBook	Mobipocket / Amazon	Amazon Kindle Apple iBooks Mobipocket Reader Desktop
oeb - Open eBook File	International Digital Publishing Forum (IDPF)	Adobe Digital Editions Apple iBooks Sony Reader
pdb - Palm Media eBook File	Palm, Inc.	ICE Book Reader Palm Reader
pml - eBook File	Palm, Inc.	Adobe Framemaker Dropbook MakeBook
prc - Mobipocket eBook File	Mobipocket	Amazon Kindle Apple iBooks Mobipocket Reader Desktop
rb - RocketEdition eBook File	NuvoMedia	Book Designer GEB Librarian RB2Project

Compressed file formats	(Back to top)
File format	Author	What programs use it ?
7z - 7-Zip Compressed File	7-zip	7Zip WinRAR WinZip
cab - Cabinet File	Microsoft	MakeCab StuffIt WinRAR WinZip
rar - WinRAR Compressed Archive	Eugene Roshal	7Zip StuffIt WinRAR WinZip
tar - Tape Archive File	The GNU Project	Apple Archive Utility GNU Tar StuffIt WinZip
tar.bz2 - Bzip 2 UNIX Compressed File
tar.gzh - Gzip Compressed Archive
tar.gz - Gzip Compressed Archive	The GNU Project	STDU Viewer eBook for EPOC
tcr - Psion eBook File	Psion Teklogix	Apple Archive Utility GNU Tar StuffIt WinZip
yz1 - DeepFreezer Compressed Archive	Yamazaki ZIPPER	DeepFreeezer IZArc TUGZip ZipZag
zip - Compressed Archive File	PKWARE	StuffIt WinRAR Winzip
zip1 - Compressed Archive File

CAD file formats	(Back to top)
File format	Author	What programs use it ?
dwg - AutoCAD Drawing Database	Autodesk	Adobe Illustrator AutoCAD Autodesk DWG TrueView CorelCAD
dxf - AutoCAD Drawing Interchange Format	Autodesk	Adobe Illustratror AutoCAD CorelCAD Open Office PaintShop Pro