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File Formats - Descriptions and Meanings

There are hundreds of different file formats today and no one-fits-all solution. We add descriptions of all popular formats so that you could learn how and why it was developed. Just click the format to read the detailed review.

To convert a file with Coolutils Online Converter just click the Browse button and select the file. Then choose the target format and get your new file in few seconds right in your Downloads folder.

Here at Coolutils we are constantly expanding the supported formats list. If you have a file that can't be converted now, drop us a line. We will probably add it to the converter.

Document file formats

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File formatAuthorWhat programs use it?
DOC - Microsoft Word DocumentMicrosoftAbiWord
Apple Pages
AppleWorks
KWord
Microsoft Word
StarOffice
PDF - Portable Document FormatAdobe SystemsAdobe Viewer
Ghostscript
Ghostview
Xpdf
CoolUtils PDF Viewer
DOCX - Microsoft Word 2007 DocumentMicrosoftMicrosoft Word 2007
Microsoft Word 2008 (MAC)
OxygenOffice Professional (Linux)
Word 2010
DOCM - Microsoft Word DocumentMicrosoftAbiWord
Apple Pages
AppleWorks
KWord
Microsoft Word
StarOffice
RTF - Rich Text FormatMicrosoftAbiWord
Kword
Microsoft Word
TextEdit
WordPad
ODT - OpenDocument spreadsheetSun MicrosystemsMicrosoft Office 2007
Microsoft Office 2010
OpenOffice Writer
TXT - Text Document
TEXT
VariousNotepad
TextEdit
WordPad
XLS - Microsoft Excel SpreadsheetMicrosoftMicrosoft Excel
Microsoft Excel Viewer
OpenOffice
XLSX - Microsoft Excel 2007 SpreadsheetMicrosoftMicrosoft Excel 2007
OpenOffice
OxygenOffice Progessional (Linux)
CSV - Comma Separated ValuesMicrosoftThe CSV file format is very simple and supported by almost all spreadsheets and database management systems
XLSM - Microsoft Excel SpreadsheetMicrosoftMicrosoft Excel
Microsoft Excel Viewer
OpenOffice
ODS - OpenDocument spreadsheetSun MicrosystemsMicrosoft Office 2007
Microsoft Office 2010
OpenOffice Calc
HTML - Hypertext Markup LanguageWorld Wide Web Consortium & WHATWGAny Web Browser (e.g. Internet Explorer, Safari, Firefox, Google Chrome)
MHT - MIME HTMLWorld Wide Web Consortium & WHATWGAny Web Browser (e.g. Internet Explorer, Safari, Firefox, Google Chrome)
PPT - Microsoft PowerPoint Presentation
PPS
MicrosoftApple Keynote
Microsoft PowerPoint
OpenOffice
PPTX - Microsoft PowerPoint 2007 Presentation
PPSX
MicrosoftApple Keynote
Microsoft PowerPoint
OpenOffice
ODP - OpenDocument presentation
FODP
Sun Microsystems and OasisCorel WordPerfect
KOffice
Lotus Symphony
NeoOffice
OpenOffice Impress
StarOffice
SXI - OpenOffice presentationSun MicrosystemsOpenOffice Impress
StarOffice
DBX - Outlook Express FormatMicrosoftOutlook Express
Windows Mail
Windows Live Mail
PST - Personal Storage TableMicrosoftMicrosoft Outlook
MSG - Encapsulated email messageMicrosoftCoolUtils MSG Viewer
EML - E-MailMicrosoftCoolUtils Mail Viewer
Apple Mail
IncrediMail
Microsoft Outlook
Microsoft Windows Live Mail
Mozilla Thunderbird
EMLX - Apple Mail EmailAppleApple's Mail
XPS - Open XML Paper SpecificationMicrosoft, Ecma InternationalChrome
Firefox
Microsoft Internet Explorer
Microsoft XPS Viewer
Safari
OXPS - Open XML Paper SpecificationMicrosoft
Ecma International

Image file formats

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File formatAuthorWhat programs use it?
AI - Adobe Illustrator ArtworkAdobeAdobe Photoshop
Adobe Reader
Corel Paint Shop Pro
ODG - Open Document GraphicOASISApache OpenOffice
LibreOffice
BMP - Windows bitmap
RLE, DIB
MicrosoftAdobe Photoshop
MS Paint
Microsoft Photo Editor
Paintbrush
JPG - JPEG compliant image
JPEG, JPE, JIF, JFIF, JFI
The JPEG CommitteeAdobe Photoshop
Apple Preview
Corel Paint Shop Pro
Microsoft Windows Photo Gallery Viewer
JXR - JPEG extended range
HDP, WDP
MicrosoftFast Picture Viewer
XnView
Windows Photo Viewer
ICO - Windows IconMicrosoftAdobe Photoshop
Microsoft Paint
Windows Picture and Fax Viewer
TIFF - Tagged image file format
TIF
Aldus, now Adobe SystemsCyberLink PowerDVD
InterVideo WinDVD
VideoLAN VLC Media Player
Windows Media Player
PNG - Portable Network GraphicPNG Development GroupApple Preview
Corel Paint Shop Pro
GIMP - The GNU Image Manipulation Program (LINUX)
Microsoft Windows Photo Gallery Viewer
Safari
PICT - Apple Image Format
PCT, PIC
Apple ComputerQuickDraw
WMF - Windows MetafileMicrosoftMicrosoft Publisher
Microsoft Word
QuarkXPress
EMF - Windows Enhanced MetafileMicrosoftMicrosoft Publisher
Microsoft Word
QuarkXPress
GIF - Compuserve graphics interchangeCompuServeAdobe Photoshop
Apple Preview
Corel Paint Shop Pro
Microsoft Windows Photo Gallery Viewer
TGA - Truevision Targa Graphic
VST, ICB, VDA, WIN
TruevisionAdobe Photoshop
Corel Paint Shop Pro
GIMP
Painter
PCX - Paintbrush Bitmap ImageZSoft CorporationAdobe Photoshop
Microsoft Paint
Windows Picture and Fax Viewer
SGI - Silicon Graphics Image
BW, RGB, RGBA, INTA, RLA, RPF
Paul Haeberli
JP2 - JPEG 2000
J2K, JPF, JPX, JPM, MJ2
Joint Photographic Experts GroupAdobe Photoshop
Apple Preview
Corel Paint Shop Pro
Microsoft Windows Photo Gallery Viewer
WEBP - Lossily compressed image fileGoogleAdobe Photoshop
Google Chrome
Picasa
PSD - Photoshop DocumentAdobe SystemsAdobe Illustrator CS6
Adobe InDesign CS6
Adobe Photoshop
GIMP
PDD - Adobe PhotoDeluxe Image fileAdobeAdobe PhotoDeluxe
Adobe Photoshop
PCD - Kodak Photo CDKodakPhotoshop
IrfanView
CR2 - Canon RAW version 2Canon Inc.Adobe Photoshop
Adobe Photoshop Lightroom
Paint Shop Pro
Picasa
digiKam
NEF - Nikon Electronic FormatNikon Inc.Adobe Photoshop
Adobe Photoshop Lightroom
Paint Shop Pro
Picasa
digiKam
DICOM - Digital Imaging and Communications in MedicineNational Electrical Manufacturers AssociationXnView
PCL - Printer Command LanguageHewlett-Packard
SVG - Scalable Vector Graphics
SVGZ
World Wide Web ConsortiumAdobe Photoshop
Apple Preview
Corel Paint Shop Pro
Corel SVG Viewer
XCF - eXperimental Computing FacilityGIMPGIMP
CinePaint
Inkscape
XPM - X PixMapBULL ResearchACDSee
Amaya
CorelDRAW
GIMP
PS - PostScriptAdobe SystemsAdobe Acrobat
LibreOffice Draw
EPS - Encapsulated PostScriptAdobe SystemsAdobe Acrobat
CorelDRAW
LibreOffice Draw
XWD - X Window dumpX Window SystemGIMP

Audio file formats

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File formatAuthorWhat programs use it?
RA - RealMedia Streaming MediaReal NetworksRealNetworks RealPlayer
RAM - RealMedia MetafileReal NetworksRealNetworks RealPlayer
RM - RealMedia Streaming MediaReal NetworksRealNetworks RealPlayer
RMVB - RealVideo Variable Bit Rate FileRealNetworksRealPlayer
VLC Media Player
AC3 - AC3 Audio FileDolby DigitalQuickTime Player
VLC Media Player
Windows Media Player
3GA - 3GA Multimedia File3rd Generation Partnership Project (3GPP)QuickTime Player
VLC Media Player
Windows Media Player
3GPP - 3GPP Multimedia File3rd Generation Partnership Project (3GPP)QuickTime Player
VLC Media Player
Windows Media Player
3GP - 3GPP Multimedia File3rd Generation Partnership Project (3GPP)QuickTime Player
VLC Media Player
Windows Media Player
OPUS - Opus lossy audio coding formatXiph.Org FoundationVLC media player
FFMpeg
AIFF - Audio Interchange File Format
AIF, AIFC
Apple IncApple QuickTime
VLC media Player
Winamp
Windows Media Player
WMA - Windows Media AudioMicrosoftVLC media player
MP3 - Compressed audio fileFraunhofer InstituteRealOne
WinAmp
Windows Media Player
iTunes
WAV - Windows audio fileMicrosoft & IBMCyberLink PowerDirector
Microsoft Windows Media Player
Roxio Creator 2009
OGG - Ogg Vorbis Compressed Audio FileXiph.Org FoundationApple QuickTime Player
Real Player
Windows Media Player
MPC - MPC (Musepack)
MPP, MP+
Andree BuschmannVLC media player
FFMpeg
FLAC - Free Lossless Audio CodecXiph.Org FoundationReal Player
VLC Media Player
Windows Media Player
MPP - Microsoft Project DocumentMicrosoftMicrosoft Project
APE - Monkey's AudioMatthew T. AshlandVLC media player
FFMpeg
AAC - Advanced Audio Coding FileA combination of Fraunhofer IIS, AT&T Bell Laboratories, Dolby and Sony CorporationKMPlayer
RealPlayer
VideoLAN VLC Media Player
Windows Media Player
iTunes
MP4 - MPEGMoving Picture Experts GroupApple QuickTime Player
Apple iTunes
Microsoft Windows Media Player
VideoLAN VLC Media Player
M4A - Compressed video fileAppleApple QuickTime Player
Apple iTunes
Microsoft Windows Media Player
OFR - OptimFROG AudioFlorin GhidoVLC media player
FFMpeg
SPX - Speex AudioXiph.Org Foundation, Jean-Marc ValinVLC media player
FFMpeg
TTA - The True AudioAleksander DjourikVLC media player
FFMpeg
WV - WavPack AudioDavid BryantVLC media player
FFMpeg

Video file formats

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File formatAuthorWhat programs use it?
AVI - Audio Video InterleaveMicrosoftALLPlayer
Apple QuickTime Player
Microsoft Windows Media Player
VideoLAN VLC Media Player
WMV - Windows Media VideoMicrosoftMPlayer
Microsoft Windows Media Player
PowerDVD
RealPlayer
VideoLAN VLC Media Player
RMVB - RealVideo Variable Bit Rate FileRealNetworksRealPlayer
VLC Media Player
VOB - Video Object FileAppleAdobe Flash Player (standalone program)
Web browser with the Flash plug-in installed
MOV - Apple QuickTime MovieAppleApple QuickTime Player
CyberLink PowerDirector
Roxio Easy Media Creator
MPG - Moving Picture Experts Group FileISO, IECVideoLAN VLC Media Player
Windows Media Player
M4V - MPEGAppleApple QuickTime Player
Apple iTunes
VLC Media Player
MP4 - MPEGMoving Picture Experts GroupApple QuickTime Player
Apple iTunes
Microsoft Windows Media Player
VideoLAN VLC Media Player
3GP - 3GPP Multimedia File3rd Generation Partnership Project (3GPP)QuickTime Player
VLC Media Player
Windows Media Player
WEBM - Multimedia Container FormatGoogle (Previously developed by On2, Xiph, and Matroska)Google Chrome
Mozilla Firefox
VLC Media Player
MTS - AVCHD Video FileSony, PanasonicVideoLAN VLC Media Player
Windows Media Player
ASF - Advanced Streaming FormatMicrosoftReal Player
VLC Media Player
Windows Media Player
MKV - Matroska Multimedia ContainerSteve LhommeVLC Media Player
3GP - 3GPP Multimedia File3rd Generation Partnership Project (3GPP)QuickTime Player
VLC Media Player
Windows Media Player
3G2 - 3GPP2 Multimedia File3rd Generation Partnership Project 2Apple QuickTime Player
GOM Player
Microsoft Media Player Classic
Totem
VideoLAN VLC Media Player
MOD - Hard disk camera movieJVC/PanasonicQuicktime Player
VLC Media Player
Windows Media Player
FLV - Flash videoAdobe Systems IncorporatedFFDShow
Microsoft Windows Photo Gallery Viewer
VideoLAN VLC Media Player
Windows Media Player
SWF - Macromedia Flash Format FileFutureWave SoftwareAdobe Flash Player (standalone program)
Web browser with the Flash plug-in installed

eBook file formats

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File formatAuthorWhat programs use it?
CBZ - Comic Book Archive FileVariousCDisplay
ComicFlow
Perfect Viewer
CBR - Comic Book RAR ArchiveVariousCDisplay
ComicFlow
Perfect Viewer
CBC - eBook FormatVariousComic Book Collector
CHM - Compiled HTML Help FileMicrosoftBeyond CHM
Internet Explorer
Microsoft Reader
Mozilla Firefox
DJVU - DjVu FileAT&T Labs - ResearchDjVuLibre DjView
LizardTech Browser Plug In
MacDjView Desktop Viewer
WinDjView
EPUB - Open eBook FileInternational Digital Publishing Forum (IDPF)Adobe Digital Editions
Apple iBooks
Mobipocket Reader Desktop
Sony Reader
FB2 - FictionBook 2.0 FileFictionBookApple iBooks
Calibre
Cool Viewer
HTML - Hypertext Markup LanguageWorld Wide Web Consortium & WHATWGAny Web Browser (e.g. Internet Explorer, Safari, Firefox, Google Chrome)
LIT - Microsoft eBook FileMicrosoftMicrosoft Reader
LRF - Sony Portable Reader FileSonySony Reader
MOBI - Mobipocket eBookMobipocket / AmazonAmazon Kindle
Apple iBooks
Mobipocket Reader Desktop
ODT - OpenDocument spreadsheetSun MicrosystemsMicrosoft Office 2007
Microsoft Office 2010
OpenOffice Writer
PDF - Portable Document FormatAdobe SystemsAdobe Viewer
Ghostscript
Ghostview
Xpdf
CoolUtils PDF Viewer
PRC - Mobipocket eBook FileMobipocketAmazon Kindle
Apple iBooks
Mobipocket Reader Desktop
PDB - Palm Media eBook FilePalm, Inc.ICE Book Reader
Palm Reader
PML - eBook FilePalm, Inc.Adobe Framemaker
Dropbook
MakeBook
RB - RocketEdition eBook FileNuvoMediaBook Designer
GEB Librarian
RB2Project
RTF - Rich Text FormatMicrosoftAbiWord
Kword
Microsoft Word
TextEdit
WordPad
AZW3 - Amazon KF8 eBook FileAmazonKindle Fire
Kindle Reader
Kindle for Android
Kindle for iOS
OEB - Open eBook FileInternational Digital Publishing Forum (IDPF)Adobe Digital Editions
Apple iBooks
Sony Reader
LRF - Sony Portable Reader FileSonySony Reader
MOBI - Mobipocket eBookMobipocket / AmazonAmazon Kindle
Apple iBooks
Mobipocket Reader Desktop
PDB - Palm Media eBook FilePalm, Inc.ICE Book Reader
Palm Reader
PML - eBook FilePalm, Inc.Adobe Framemaker
Dropbook
MakeBook
RB - RocketEdition eBook FileNuvoMediaBook Designer
GEB Librarian
RB2Project

CAD file formats

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File formatAuthorWhat programs use it?
DWG - AutoCAD Drawing DatabaseAutodeskAdobe Illustrator
AutoCAD
Autodesk DWG TrueView
CorelCAD
DWF - Design Web FormatAutodeskAutoCAD
Inventor
Revit Architectural
DXF - AutoCAD Drawing Interchange FormatAutodeskAdobe Illustratror
AutoCAD
CorelCAD
Open Office
PaintShop Pro
PLT - Printer Command LanguageHewlett-Packard
CGM - Computer Graphics MetafileANSI, ISO/IEC, W3C
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