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.

Click a category to see details of the file formats:

Document File Formats
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
LizardTech Browser Plug In
DjVuLibre DjView
WinDjView
MacDjView Desktop Viewer
doc - Microsoft Word Document Microsoft
Microsoft Word
Apple Pages
AppleWorks
StarOffice
AbiWord
KWord
docx - Microsoft Word 2007 Document Microsoft
Microsoft Word 2007
Microsoft Word 2008 (MAC)
Word 2010
OxygenOffice Professional (Linux)
eml - E-Mail Microsoft
Microsoft Outlook
Mozilla Thunderbird
Microsoft Windows Live Mail
IncrediMail
Apple Mail
eps - Encapsulated PostScript Adobe Systems
Adobe Acrobat
Adobe Illustrator
Adobe Photoshop
Microsoft Digital Image Editor
CorelDRAW
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
iWork '09
Keynote 5.0
Keynote 5.1
Keynote 5.2
Keynote 5.3
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
Microsoft Access
MDB Viewer Plus
mpp - Microsoft Project Document Microsoft
Microsoft Project
msg - Encapsulated email message Microsoft
Microsoft Outlook
Priasoft MSG File Viewer and Assessor
Encryptomatic MsgViewer Pro
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
OpenOffice Impress
NeoOffice
StarOffice
KOffice
Corel WordPerfect
Lotus Symphony
ods - OpenDocument spreadsheet Sun Microsystems
OpenOffice Calc
Microsoft Office 2010
Microsoft Office 2007
odt - OpenDocument text Sun Microsystems
OpenOffice Writer
Microsoft Office 2010
Microsoft Office 2007
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
iWork '09
Pages 4.0
Pages 4.1
Pages 4.2
Pages 4.3
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
gPDF
Xpdf
Ghostview
Ghostscript
pps - Microsoft PowerPoint Presentation Microsoft
Apple Keynote
Microsoft PowerPoint
OpenOffice
ppsx - Microsoft PowerPoint 2007 Slide Show Microsoft
Apple Keynote
OpenOffice
Microsoft PowerPoint
ppt - Microsoft PowerPoint Presentation Microsoft
Microsoft PowerPoint
Apple Keynote
OpenOffice
pptx - Microsoft PowerPoint 2007 Presentation Microsoft
Apple Keynote
OpenOffice
Microsoft PowerPoint
ps - PostScript Adobe Systems
Adobe Acrobat
Quark Xpress
Adobe Photoshop
pst - Personal Folder File Microsoft
Microsoft Outlook 365
Microsoft Exchange Server
Encryptomatic PSTViewer Pro
pub - Microsoft Publisher Microsoft
Microsoft Publisher
rtf - Rich Text Format Microsoft
WordPad
Microsoft Word
TextEdit
AbiWord
Kword
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
WordPad
TextEdit
vsd - Visio Drawing Microsoft
Microsoft Visio
Microsoft Visio Viewer
Microsoft Internet Explorer
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 Works Word Processor
Works Converter
Microsoft Word
OxygenOffice
NeoOffice
xls - Microsoft Excel Spreadsheet Microsoft
Microsoft Excel
Microsoft Excel Viewer
OpenOffice
xlsx - Microsoft Excel 2007 Spreadsheet Microsoft
Microsoft Excel 2007
OxygenOffice Progessional (Linux)
OpenOffice
xlr - Works Spreadsheet or Chart (Microsoft Corporation) Microsoft
Microsoft Works
xml - Extensible Markup Language World Wide Web Consortium
Microsoft Office InfoPath
Microsoft Internet Explorer
Notepad
Firefox
Chrome
Safari
Oxygen XML Editor
xps - Open XML Paper Specification Microsoft
Microsoft XPS Viewer
Microsoft Internet Explorer
Firefox
Chrome
Safari
Image File Formats
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 Reader
Adobe Photoshop
Corel Paint Shop Pro
arw - Sony Alpha Raw Sony
Adobe Photoshop
Adobe Photoshop Elements
Corel Draw
GIMP
Google Picasa
XnView
bmp - Windows bitmap Microsoft
MS Paint
Microsoft Photo Editor
Adobe Photoshop
Paintbrush
cdr - Corel Draw Vector drawing file Corel Corporation
Adobe Reader
Adobe Illustrator
Corel PaintShop Photo Pro
Corel WordPerfect Office
LibreOffice
cr2 - Canon RAW version 2 Canon Inc.
Adobe Photoshop
Adobe Photoshop Lightroom
Picasa
Paint Shop Pro
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 Word
QuarkXPress
Microsoft Publisher
erf - Epson RAW File Epson
Adobe Photoshop
Adobe Photoshop Elements
Corel Draw
Epson PhotoRAW
gif - Compuserve graphics interchange CompuServe
Apple Preview
Adobe Photoshop
Corel Paint Shop Pro
Microsoft Windows Photo Gallery Viewer
heic - High Efficiency Image Coding Moving Picture Experts Group (MPEG)
Mac OS Preview app
Microsoft Photos app
Adobe Photoshop
ico - Windows Icon Microsoft
Microsoft Paint
Adobe Photoshop
Windows Picture and Fax Viewer
jpg - JPEG compliant image The JPEG Committee
Apple Preview
Adobe Photoshop
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
Picasa
Paint Shop Pro
digiKam
odg - OpenDocument Drawing Sun Microsystems
OpenOffice Draw
Libre Office
orf - Olympus RAW Image file Olympus
Adobe Photoshop
Adobe Photoshop Elements
Corel Draw
Olympus Master
Google Picasa
pcx - Paintbrush Bitmap Image ZSoft Corporation
Microsoft Paint
Adobe Photoshop
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
Safari
Microsoft Windows Photo Gallery Viewer
Corel Paint Shop Pro
GIMP - The GNU Image Manipulation Program (LINUX)
ppm - Portable Pixmap file Jef Poskanzer
Adobe Photoshop
Corel Draw
GIMP
Netpbm
psd - Photoshop Document Adobe Systems
Adobe Photoshop
Adobe InDesign CS6
Adobe Illustrator CS6
GIMP
raf - Fuji RAW Image File Fuji
Adobe Photoshop
Adobe Photoshop Elements
Adobe Lightroom
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
Apple Preview
Adobe Photoshop
Corel Paint Shop Pro
Corel SVG Viewer
tga - Truevision Targa Graphic Truevision
Adobe Photoshop
Corel Paint Shop Pro
Painter
GIMP
thumbnail - Thumbnail image CompuServe
Apple Preview
Adobe Photoshop
Corel Paint Shop Pro
Microsoft Windows Photo Gallery Viewer
tiff - Tagged image file format Aldus, Adobe Systems
CyberLink PowerDVD
Windows Media Player
VideoLAN VLC Media Player
InterVideo WinDVD
wbmp - Wireless Bitmap File Format WAP Forum
Microsoft Paint
Adobe Photoshop
Windows Picture and Fax Viewer
webp - Lossily compressed image file Google
Google Chrome
Adobe Photoshop
Picasa
wmf - Windows Metafile Microsoft
Microsoft Word
QuarkXPress
Microsoft Publisher
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
GIMP
CorelDraw
XnViewMP
Audio File Formats
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
iTunes
Windows Media Player
RealPlayer
KMPlayer
VideoLAN VLC Media Player
ac3 - AC3 Audio File Dolby Digital
QuickTime Player
VLC Media Player
Windows Media Player
aifc - Audio Interchange File Format Compressed Apple Inc
Windows Media Player
Apple QuickTime
VLC media Player
Winamp
aiff - Audio Interchange File Format Apple Inc
Windows Media Player
Apple QuickTime
VLC media Player
Winamp
amr - Adaptive Multi-Rate Audio Codec 3rd Generation Partnership Project (3GPP)
Apple QuickTime
Realplayer
VLC media Player
Winamp
ape - Monkeys Audio Monkeys Audio
VLC media Player
APE Player
caf - Core Audio Format Apple Inc
Apple QuickTime
VLC media Player
flac - Free Lossless Audio Codec Xiph.Org Foundation
Windows Media Player
VLC Media Player
Real Player
m4a - Compressed video file Apple
Apple iTunes
VLC
Apple QuickTime Player
iPhone
iPad
Android Tablet
Android Phones
m4b - MPEG-4 Audio Layer Bookmarkable File Apple
Apple iTunes
Apple QuickTime Player
m4r - iPhone Ringtone File Apple
Apple iTunes
Apple QuickTime Player
midi - Musical Instrument Digital Interface Various
Audio Evolution
GarageBand
Master Tracks Pro
Sonar
mp3 - Compressed audio file Moving Picture Experts Group
RealOne
WinAmp
iTunes
Windows Media Player
oga - Ogg Audio Only File Xiph.Org Foundation
Windows Media Player
Apple QuickTime Player
Real Player
ogg - Ogg Vorbis Compressed Audio File Xiph.Org Foundation
Windows Media Player
Apple QuickTime Player
Real Player
ra - RealMedia Streaming Media Real Networks
RealNetworks RealPlayer
ram - RealMedia Metafile Real Networks
RealNetworks RealPlayer
wav - Windows audio file Microsoft & IBM
Microsoft Windows Media Player
Quicktime
VLC
wma - Windows Media Audio Microsoft
Windows Media Player
VLC Media Player
MPlayer
Realplayer
Windows Movie Maker
Video File Formats
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
VideoLAN VLC Media Player
Microsoft Media Player Classic
Totem
GOM 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
Windows Media Player
Real Player
VLC Media Player
avi - Windows video file Microsoft
Microsoft Windows Media Player
VideoLAN VLC Media Player
ALLPlayer
Apple QuickTime Player
f4v - Flash MP4 video Apple
VideoLAN VLC Media Player
Windows Media Player
FFDShow
Microsoft Windows Photo Gallery Viewer
flv - Flash video Adobe Systems Incorporated
VideoLAN VLC Media Player
Windows Media Player
FFDShow
Microsoft Windows Photo Gallery Viewer
gvi - Google video file Google
Google VideoPlayer
VideoLAN VLC Media Player
Windows MediaPlayer classic
ipad - MPEG-4 (H264) Video File Moving Picture Experts Group
Apple QuickTime Player
Apple iTunes
Microsoft Windows Media Player
VideoLAN VLC Media Player
iphone - MPEG-4 (H264) Video File Moving Picture Experts Group
Apple QuickTime Player
Apple iTunes
Microsoft Windows Media Player
VideoLAN VLC Media Player
ipod - MPEG-4 Video File Moving Picture Experts Group
Apple QuickTime Player
Apple iTunes
Microsoft Windows Media Player
VideoLAN VLC Media Player
m2ts - Blu-ray BDAV Video file Blu-ray Disc Association
Windows Media Player
VideoLAN VLC Media Player
m4v - MPEG-4 Video File Apple
Apple iTunes
Apple QuickTime Player
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
VLC Media Player
Windows Media Player
Quicktime 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
Windows Media Player
VideoLAN VLC Media Player
mts - AVCHD Video File Sony, Panasonic
Windows Media Player
VideoLAN VLC Media Player
rm - RealMedia Streaming Media Real Networks
RealNetworks RealPlayer
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
Microsoft Windows Media Player
VideoLAN VLC Media Player
PowerDVD
RealPlayer
MPlayer
eBook File Formats
File Format Author What Programs Use It?
azw - Amazon Kindle eBook File Amazon
Kindle Reader
Kindle for iOS
Kindle for Android
azw3 - Amazon KF8 eBook File Amazon
Kindle Reader
Kindle for iOS
Kindle for Android
Kindle Fire
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
Microsoft Reader
Beyond CHM
Mozilla Firefox
Internet Explorer
epub - Open eBook File International Digital Publishing Forum (IDPF)
Adobe Digital Editions
Sony Reader
Apple iBooks
Mobipocket Reader Desktop
fb2 - FictionBook 2.0 File FictionBook
Calibre
Apple iBooks
Cool Viewer
lit - Microsoft eBook File Microsoft
Microsoft Reader
lrf - Sony Portable Reader File Sony
Sony Reader
mobi - Mobipocket eBook Mobipocket / Amazon
Apple iBooks
Amazon Kindle
Mobipocket Reader Desktop
oeb - Open eBook File International Digital Publishing Forum (IDPF)
Apple iBooks
Adobe Digital Editions
Sony Reader
pdb - Palm Media eBook File Palm, Inc.
ICE Book Reader
Palm Reader
pml - eBook File Palm, Inc.
Dropbook
MakeBook
Adobe Framemaker
prc - Mobipocket eBook File Mobipocket
Apple iBooks
Amazon Kindle
Mobipocket Reader Desktop
rb - RocketEdition eBook File NuvoMedia
GEB Librarian
RB2Project
Book Designer
tcr - Psion eBook File Psion Teklogix
GNU Tar
WinZip
StuffIt
Apple Archive Utility
Archive File Formats
File Format Author What Programs Use It?
7z - 7-Zip Compressed File 7-zip
7Zip
WinZip
WinRAR
cab - Cabinet File Microsoft
WinRAR
WinZip
StuffIt
MakeCab
lzh - Compressed Archive File Haruyasu Yoshizaki
WinRAR
LHA
WinZip
rar - WinRAR Compressed Archive Eugene Roshal
WinRAR
StuffIt
7Zip
WinZip
tar - Tape Archive File The GNU Project
GNU Tar
WinZip
StuffIt
Apple Archive Utility
tar.bz2 - Bzip 2 UNIX Compressed File The GNU Project
GNU Tar
WinZip
StuffIt
Apple Archive Utility
tar.gzh - Gzip Compressed Archive The GNU Project
eBook for EPOC
STDU Viewer
tar.gz - Gzip Compressed Archive The GNU Project
eBook for EPOC
STDU Viewer
yz1 - DeepFreezer Compressed Archive Yamazaki ZIPPER
IZArc
TUGZip
DeepFreeezer
ZipZag
zip - Compressed Archive File PKWARE
Winzip
StuffIt
WinRAR
CAD File Formats
File Format Author What Programs Use It?
dwg - AutoCAD Drawing Database Autodesk
AutoCAD
Autodesk DWG TrueView
Adobe Illustrator
CorelCAD
dxf - AutoCAD Drawing Interchange Format Autodesk
AutoCAD
Open Office
Adobe Illustratror
CorelCAD
PaintShop Pro