Handy little list of used Windows File Types and what they're used for :)
| Extension | File Type Description | Content Type |
|---|---|---|
| 1 | WinRAR archive | |
| 386 | Virtual device driver | |
| 3G2 | 3G2 File | video/3gpp2 |
| 3GP | 3GP File | video/3gpp |
| 3GP2 | 3GP2 File | video/3gpp2 |
| 3GPP | 3GPP File | video/3gpp |
| 7Z | WinRAR archive | |
| 8BA | 8BA File | |
| 8BC | 8BC File | |
| 8BE | 8BE File | |
| 8BF | 8BF File | |
| 8BI | 8BI File | |
| 8BP | 8BP File | |
| 8BS | 8BS File | |
| 8BX | 8BX File | |
| 8BY | 8BY File | |
| 8LI | 8LI File | |
| AAC | AAC File | audio/vnd.dlna.adts |
| ABR | ABR File | |
| ACB | ACB File | |
| ACBL | Adobe Color Book File | |
| ACCDA | Microsoft Access Add-in | application/msaccess.addin |
| ACCDB | Microsoft Access Database | application/msaccess |
| ACCDC | Microsoft Access Signed Package | application/msaccess.cab |
| ACCDE | Microsoft Access ACCDE Database | application/msaccess.exec |
| ACCDR | Microsoft Access Runtime Application | application/msaccess.runtime |
| ACCDT | Microsoft Access Template | application/msaccess.template |
| ACCDU | Microsoft Access Add-in Data | |
| ACCDW | Microsoft Access Web Application | application/msaccess.webapplication |
| ACCFT | Microsoft Access Template | application/msaccess.ftemplate |
| ACCOUNTPICTURE-MS | Account Picture | application/windows-accountpicture |
| ACE | WinRAR archive | |
| ACF | ACF File | |
| ACL | AutoCorrect List File | |
| ACO | ACO File | |
| ACT | ACT File | |
| ACV | ACV File | |
| ADE | Microsoft Access Project Extension | application/msaccess |
| ADN | Microsoft Access Blank Project Template | |
| ADO | ADO File | |
| ADOBEBRIDGE | Adobe Bridge URL | application/x-bridge-url |
| ADP | Microsoft Access Project | application/msaccess |
| ADT | ADT File | audio/vnd.dlna.adts |
| ADTS | ADTS File | audio/vnd.dlna.adts |
| AEP | Adobe After Effects Project | |
| AEPX | Adobe After Effects XML Project | |
| AET | Adobe After Effects Project Template | |
| AEX | Adobe After Effects Effect | |
| AHS | AHS File | |
| AHU | AHU File | |
| AI | Adobe Illustrator Artwork 16.0 | application/postscript |
| AIA | Adobe Illustrator Action File | |
| AIF | AIF Audio File | audio/aiff |
| AIFC | AIFC Audio File | audio/aiff |
| AIFF | AIFF Audio File | audio/aiff |
| AIP | Adobe Illustrator Plugin | |
| AIR | Installer Package | application/vnd.adobe.air-application-installer-package+zip |
| AIT | Adobe Illustrator Template | |
| ALV | ALV File | |
| AMEPROJCS6 | FileType_en_US_default | |
| AMP | AMP File | |
| AMS | AMS File | |
| ANI | Animated Cursor | |
| AOM | Adobe After Effects Output Module Template | |
| API | API File | |
| APL | APL File | |
| APLN | InDesign Adobe Plug-in | |
| APPCONTENT-MS | Application Content | application/windows-appcontent+xml |
| APPLICATION | Application Manifest | application/x-ms-application |
| APPREF-MS | Application Reference | |
| ARCUT | Adobe Prelude RoughCut | |
| ARJ | WinRAR archive | |
| ARS | Adobe After Effects Render Settings Template | |
| AS | AS File | |
| ASA | Active Server Page | |
| ASAX | ASAX File | |
| ASCX | ASCX File | |
| ASE | ASE File | |
| ASF | Windows Media Audio/Video file | video/x-ms-asf |
| ASHX | ASHX File | |
| ASL | ASL File | |
| ASMX | ASMX File | |
| ASP | Active Server Page | |
| ASPX | Web Form | |
| AST | AST File | |
| ASV | ASV File | |
| ASX | Windows Media Audio/Video playlist | video/x-ms-asf |
| ATF | ATF File | |
| ATN | ATN File | |
| AU | AU Audio File | audio/basic |
| AUP | Audacity Project File | |
| AVA | AVA File | |
| AVI | AVI File | video/avi |
| AW | Answer Wizard File | |
| AWF | Adobe.WorkFlow.Files | application/vnd.adobe.workflow |
| AXD | AXD File | |
| AXT | AXT File | |
| BAT | Windows Batch File | |
| BLG | Performance Monitor File | |
| BLW | BLW File | |
| BMP | BMP File | image/bmp |
| BMPR | Balsamiq Project | application/vnd.balsamiq.bmpr |
| BWF | BWF Audio File | |
| BZ | WinRAR archive | |
| BZ2 | WinRAR archive | |
| CAB | WinRAR archive | |
| CAMP | WCS Viewing Condition Profile | |
| CAT | Security Catalogue | application/vnd.ms-pki.seccat |
| CDA | CD Audio Track | |
| CDLX | Adobe Audition CD Layout File | |
| CDMP | WCS Device Profile | |
| CDX | Active Server Page | |
| CDXML | Windows PowerShell Cmdlet Definition XML Document | |
| CER | Security Certificate | application/x-x509-ca-cert |
| CFC | Adobe ColdFusion Component | |
| CFM | Adobe ColdFusion File | |
| CHA | CHA File | |
| CHK | Recovered File Fragments | |
| CHM | Compiled HTML Help file | |
| CIN | CIN File | |
| CLX | CLX File | |
| CMD | Windows Command Script | |
| COLLECTION | Adobe Bridge Collection File | |
| COM | MS-DOS Application | |
| COMPOSITEFONT | Composite Font File | |
| CONFIG | CONFIG File | |
| CONTACT | Contact file | text/x-ms-contact |
| CPL | Control panel item | |
| CRL | Certificate Revocation List | application/pkix-crl |
| CRT | Security Certificate | application/x-x509-ca-cert |
| CRTX | Microsoft Office Chart Template | |
| CSF | Adobe Color Settings File | |
| CSH | CSH File | |
| CSS | Cascading Style Sheet Document | text/css |
| CSV | Microsoft Excel Comma Separated Values File | application/vnd.ms-excel |
| CUR | Cursor | |
| DB | Data Base File | |
| DCP | DCP File | |
| DCPR | DCPR File | |
| DCR | DCR File | application/x-director |
| DCST | InDesign Document Presets | |
| DCT | Adobe Illustrator Spelling Dictionary | |
| DCTX | Open Extended Dictionary | |
| DCTXC | Open Extended Dictionary | |
| DDS | DDS Image | image/vnd.ms-dds |
| DEL | Adobe Premiere Edit Decision List | |
| DER | Security Certificate | application/x-x509-ca-cert |
| DESKLINK | Desktop Shortcut | |
| DESKTHEMEPACK | Windows Desktop Theme Pack File | |
| DET | Office Data File | |
| DIAGCAB | Troubleshooting Pack Cabinet | |
| DIAGCFG | Troubleshooting Pack Configuration | |
| DIAGPKG | Troubleshooting Pack | |
| DIB | DIB File | image/bmp |
| DIC | Text Document | |
| DISCO | DISCO File | |
| DLL | Application extension | application/x-msdownload |
| DLX | Adobe Premiere Movie | |
| DOC | Microsoft Word 97 - 2003 Document | application/msword |
| DOCHTML | Microsoft Word HTML Document | |
| DOCM | Microsoft Word Macro-Enabled Document | application/vnd.ms-word.document.macroEnabled.12 |
| DOCMHTML | DOCMHTML File | |
| DOCX | Microsoft Word Document | application/vnd.openxmlformats-officedocument.wordprocessingml.document |
| DOCXML | Microsoft Word XML Document | |
| DOT | Microsoft Word 97 - 2003 Template | application/msword |
| DOTHTML | Microsoft Word HTML Template | |
| DOTM | Microsoft Word Macro-Enabled Template | application/vnd.ms-word.template.macroEnabled.12 |
| DOTX | Microsoft Word Template | application/vnd.openxmlformats-officedocument.wordprocessingml.template |
| DQY | Microsoft Excel ODBC Query File | |
| DRV | Device driver | |
| DSN | Data Source Name | |
| DWT | DWT File | |
| EAP | EAP File | |
| ELM | Microsoft Office Themes File | |
| EM | Adobe Encore Menu Template | |
| EMF | EMF File | image/x-emf |
| EML | E-mail Message | |
| ENV | ENV File | |
| EPS | Encapsulated PostScript | application/postscript |
| EVT | Classic Event Log | |
| EVTX | Event Log | |
| EXC | Text Document | |
| EXE | Application | application/x-msdownload |
| EXR | EXR File | |
| FDM | Outlook Form Definition | |
| FFO | FFO File | |
| FFX | Adobe After Effects Preset | |
| FL3 | FL3 File | |
| FLAC | FLAC File | audio/x-flac |
| FLST | InDesign Flattener Presets | |
| FLT | Adobe Illustrator Filter | |
| FOMOD | Fallout Mod Archive | |
| FON | Font file | |
| FXG | FXG File | |
| GCSX | Microsoft Office SmartArt Graphic Color Variation | |
| GIF | GIF File | image/gif |
| GLOX | Microsoft Office SmartArt Graphic Layout | |
| GMMP | WCS Gamut Mapping Profile | |
| GNS3 | GNS3 Project File | |
| GNS3A | GNS3 Appliance File | |
| GNS3APPLIANCE | GNS3 Appliance File | |
| GNS3P | GNS3 Portable Project File | |
| GNS3PROJECT | GNS3 Portable Project File | |
| GQSX | Microsoft Office SmartArt Graphic Quick Style | |
| GRA | Microsoft Graph Chart | |
| GRD | GRD File | |
| GROUP | Group file | text/x-ms-group |
| GRP | Microsoft Program Group | |
| GZ | WinRAR archive | application/x-gzip |
| HDD | Virtual Hard Disk | application/x-virtualbox-hdd |
| HDR | HDR File | |
| HLP | Help file | |
| HML | RivaTuner hardware monitoring log file | |
| HOL | Outlook Holidays | |
| HTA | HTML Application | application/hta |
| HTM | HTM File | text/html |
| HTML | Chrome HTML Document | text/html |
| HXA | Microsoft Help Attribute Definition File | application/xml |
| HXC | Microsoft Help Collection Definition File | application/xml |
| HXD | Microsoft Help Validator File | application/octet-stream |
| HXE | Microsoft Help Samples Definition File | application/xml |
| HXF | Microsoft Help Include File | application/xml |
| HXH | Microsoft Help Merged Hierarchy File | application/octet-stream |
| HXI | Microsoft Help Compiled Index File | application/octet-stream |
| HXK | Microsoft Help Index File | application/xml |
| HXQ | Microsoft Help Merged Query Index File | application/octet-stream |
| HXR | Microsoft Help Merged Attribute Index File | application/octet-stream |
| HXS | Microsoft Help Compiled Storage File | application/octet-stream |
| HXT | Microsoft Help Table of Contents File | application/xml |
| HXV | Microsoft Help Virtual Topic Definition File | application/xml |
| HXW | Microsoft Help Attribute Definition File | application/octet-stream |
| HYP | Adobe Illustrator Hyphenation Dictionary | |
| ICAP | InCopy Markup Assignment Package | |
| ICC | ICC Profile | |
| ICL | Icon library | |
| ICM | ICC Profile | |
| ICMA | InCopy Markup Assignment File | |
| ICML | InCopy Markup Document | |
| ICMT | InCopy Markup Template | |
| ICO | Icon | image/x-icon |
| ICS | iCalendar File | text/calendar |
| ICST | InCopy.Document.Presets | |
| IDAP | InDesign Markup Assignment Package | |
| IDEA | IDEA File | |
| IDLK | InDesign Lock File | |
| IDML | InDesign Markup Document | |
| IDMS | InDesign Markup Snippet | |
| IDPK | InDesign Package For GoLive | |
| IDPP | InDesign Preflight Profile | |
| IFF | IFF Audio File | |
| IMESX | IME Search provider definition | |
| IMG | Disc Image File | |
| INCA | InCopy Assignment File | |
| INCD | InCopy Document | |
| INCP | InCopy Assignment Package | |
| INCT | InCopyTemplate | |
| INCX | InCopy Interchange Document | |
| INDB | InDesign Book | |
| INDD | InDesign Document | |
| INDK | INDK File | |
| INDL | InDesign Asset Library | |
| INDP | InDesign Assignment Package | |
| INDS | InDesign Snippet | |
| INDT | InDesignTemplate | |
| INF | Setup Information | |
| INI | Configuration settings | |
| INLX | InDesign Interchange Library | |
| INMS | InDesign Menu Set | |
| INX | InDesign XML Interchange Document | |
| IQY | Microsoft Excel Web Query File | text/x-ms-iqy |
| IRCP | Adobe SpeedGrade Project File | |
| IROS | IROS File | |
| IRS | IRS File | |
| ISO | WinRAR archive | |
| JAR | Executable Jar File | |
| JFIF | JFIF File | image/jpeg |
| JNLP | JNLP File | application/x-java-jnlp-file |
| JOB | Task Scheduler Task Object | |
| JOBOPTIONS | PDF Settings | |
| JOD | Microsoft.Jet.OLEDB.4.0 | |
| JPE | JPE File | image/jpeg |
| JPEG | JPEG File | image/jpeg |
| JPG | JPG File | image/jpeg |
| JPS | JPS File | image/jps |
| JS | JavaScript File | |
| JSE | JScript Encoded Script File | |
| JSF | Adobe Fireworks JSF File | |
| JSP | Active Server Page | |
| JSX | Adobe JavaScript file | text/plain |
| JSXBIN | Adobe JavaScript Binary file | text/plain |
| JSXINC | Adobe JavaScript Include file | text/plain |
| JXR | JXR File | image/vnd.ms-photo |
| KMZ | KMZ File | |
| KYS | KYS File | |
| LABEL | Property List | |
| LACCDB | Microsoft Access Record-Locking Information | |
| LAYOUT | Adobe Premiere Layout | |
| LBI | LBI File | |
| LDB | Microsoft Access Record-Locking Information | |
| LEX | LEX File | |
| LHA | WinRAR archive | |
| LIBRARY-MS | Library | application/windows-library+xml |
| LNK | Shortcut | |
| LNST | InDesign Line Presets | |
| LOG | Text Document | |
| LZ | WinRAR archive | |
| LZH | WinRAR archive | |
| M1V | Movie Clip | video/mpeg |
| M2T | M2T File | video/vnd.dlna.mpeg-tts |
| M2TS | M2TS File | video/vnd.dlna.mpeg-tts |
| M2V | Movie Clip | video/mpeg |
| M3U | M3U File | audio/x-mpegurl |
| M4A | M4A File | audio/mp4 |
| M4V | M4V File | video/mp4 |
| MAD | Microsoft Access Module Shortcut | |
| MAF | Microsoft Access Form Shortcut | |
| MAG | Microsoft Access Diagram Shortcut | |
| MAM | Microsoft Access Macro Shortcut | |
| MAPIMAIL | Email Service | |
| MAQ | Microsoft Access Query Shortcut | |
| MAR | Microsoft Access Report Shortcut | |
| MAS | Microsoft Access Stored Procedure Shortcut | |
| MAT | Microsoft Access Table Shortcut | |
| MAU | MAU File | |
| MAV | Microsoft Access View Shortcut | |
| MAW | Microsoft Access Data Access Page Shortcut | |
| MDA | Microsoft Access Add-in | application/msaccess |
| MDB | Microsoft Access Database | application/msaccess |
| MDBHTML | Microsoft Access HTML Document | |
| MDE | Microsoft Access MDE Database | application/msaccess |
| MDN | Microsoft Access Blank Database Template | |
| MDT | Microsoft Access Add-in Data | |
| MDW | Microsoft Access Workgroup Information | |
| MHT | MHTML Document | message/rfc822 |
| MHTML | MHTML Document | message/rfc822 |
| MID | MIDI Sequence | audio/mid |
| MIDI | MIDI Sequence | audio/mid |
| MK3D | MK3D Video | |
| MKA | MKA File | audio/x-matroska |
| MKV | MKV File | video/x-matroska |
| MLC | Language Pack File | |
| MNO | MNO File | |
| MNU | MNU File | |
| MOD | MOD File | video/mpeg |
| MOS | MOS File | |
| MOV | MOV File | video/quicktime |
| MP2 | MP3 Format Sound | audio/mpeg |
| MP2V | Movie Clip | video/mpeg |
| MP3 | MP3 File | audio/mpeg |
| MP4 | MP4 File | video/mp4 |
| MP4V | MP4V File | video/mp4 |
| MPA | MPA File | audio/mpeg |
| MPE | MPE File | video/mpeg |
| MPEG | MPEG File | video/mpeg |
| MPG | MPG File | video/mpeg |
| MPO | MPO File | image/mpo |
| MPV2 | MPV2 File | video/mpeg |
| MSC | Microsoft Common Console Document | |
| MSG | Outlook Item | |
| MSI | Windows Installer Package | |
| MSP | Windows Installer Patch | |
| MSRCINCIDENT | Windows Remote Assistance Invitation | |
| MSSTYLES | Windows Visual Style File | |
| MSU | Microsoft Update Standalone Package | |
| MS-WINDOWS-STORE-LICENSE | Windows Store License | |
| MTS | MTS File | video/vnd.dlna.mpeg-tts |
| MXI | Adobe Extension Information File | |
| MXP | Adobe Extension Package File | application/x-mmxp |
| MYDOCS | MyDocs Drop Target | |
| NCOR | Adobe Encore Document | |
| NFO | System Information File | |
| NK2 | Outlook Nickname File | |
| NST | Outlook Data File | |
| NXM | Nexus Mod Manager Mod Archive | |
| OCX | ActiveX control | |
| ODC | Microsoft Office Data Connection | text/x-ms-odc |
| ODCCUBEFILE | ODCCUBEFILE File | |
| ODCDATABASEFILE | ODCDATABASEFILE File | |
| ODCNEWFILE | ODCNEWFILE File | |
| ODCTABLECOLLECTIONFILE | ODCTABLECOLLECTIONFILE File | |
| ODCTABLEFILE | ODCTABLEFILE File | |
| ODP | OpenDocument Presentation | application/vnd.oasis.opendocument.presentation |
| ODS | OpenDocument Spreadsheet | application/vnd.oasis.opendocument.spreadsheet |
| ODT | OpenDocument Text | application/vnd.oasis.opendocument.text |
| OFS | Outlook Form Regions | |
| OFT | Outlook Item Template | |
| OGG | OGG Audio File | |
| OLS | Office List Shortcut | application/vnd.ms-publisher |
| OMF | OMF Audio File | |
| OMOD | Oblivion Mod Archive | |
| OPC | Microsoft Clean-up Wizard File | |
| OQY | Microsoft Excel OLAP Query File | |
| OSDX | Search connector description | application/opensearchdescription+xml |
| OST | Outlook Data File | |
| OTF | OpenType font file | |
| OTM | Outlook VBA Project File | |
| OVA | Open Virtualization Format Archive | application/x-virtualbox-ova |
| OVF | Open Virtualization Format | application/x-virtualbox-ovf |
| P10 | Certificate Request | application/pkcs10 |
| P12 | Personal Information Exchange | application/x-pkcs12 |
| P7B | PKCS #7 Certificates | application/x-pkcs7-certificates |
| P7C | Certificate file | application/pkcs7-mime |
| P7M | PKCS #7 MIME Message | application/pkcs7-mime |
| P7R | Certificate Request Response | application/x-pkcs7-certreqresp |
| P7S | PKCS #7 Signature | application/pkcs7-signature |
| PAB | Outlook Personal Address Book | |
| PARTIAL | Partial Download | |
| PAT | PAT File | |
| PBK | Dial-Up Phonebook | |
| PBM | PBM File | |
| PCB | PCB File | |
| PCD | PCD File | |
| PCX | PCX File | |
| PDD | PDD File | |
| PDFS | InDesign PDF Export Presets | |
| PDN | paint.net Image | |
| PDP | PDP File | |
| PERFMONCFG | Performance Monitor Configuration | |
| PFM | Type 1 Font file | |
| PFX | Personal Information Exchange | application/x-pkcs12 |
| PHP | PHP Script | |
| PHP3 | PHP3 Script | |
| PHP4 | PHP4 Script | |
| PIF | Shortcut to MS-DOS Program | |
| PKA | Cisco Packet Tracer | |
| PKF | Adobe Audition Peak Data File | |
| PKO | Public Key Security Object | application/vnd.ms-pki.pko |
| PKT | Cisco Packet Tracer | |
| PKZ | Cisco Packet Tracer | |
| PLE | PLE File | |
| PLN | InDesign 3d Party Plug-in | |
| PLPROJ | Adobe Prelude Project | |
| PNF | Precompiled Setup Information | |
| PNG | PNG File | image/png |
| PNS | PNS File | image/pns |
| POT | Microsoft PowerPoint 97-2003 Template | application/vnd.ms-powerpoint |
| POTHTML | Microsoft PowerPoint HTML Template | |
| POTM | Microsoft PowerPoint Macro-Enabled Design Template | application/vnd.ms-powerpoint.template.macroEnabled.12 |
| POTX | Microsoft PowerPoint Template | application/vnd.openxmlformats-officedocument.presentationml.template |
| PPA | Microsoft PowerPoint 97-2003 Addin | application/vnd.ms-powerpoint |
| PPAM | Microsoft PowerPoint Addin | application/vnd.ms-powerpoint.addin.macroEnabled.12 |
| PPJ | Adobe Premiere Project | |
| PPK | PuTTY Private Key File | application/x-putty-private-key |
| PPKG | RunTime Provisioning Tool | |
| PPROJ | Adobe Premiere Project | |
| PPS | Microsoft PowerPoint 97-2003 Slide Show | application/vnd.ms-powerpoint |
| PPSM | Microsoft PowerPoint Macro-Enabled Slide Show | application/vnd.ms-powerpoint.slideshow.macroEnabled.12 |
| PPSX | Microsoft PowerPoint Slide Show | application/vnd.openxmlformats-officedocument.presentationml.slideshow |
| PPT | Microsoft PowerPoint 97-2003 Presentation | application/vnd.ms-powerpoint |
| PPTHTML | Microsoft PowerPoint HTML Document | |
| PPTM | Microsoft PowerPoint Macro-Enabled Presentation | application/vnd.ms-powerpoint.presentation.macroEnabled.12 |
| PPTMHTML | PPTMHTML File | |
| PPTX | Microsoft PowerPoint Presentation | application/vnd.openxmlformats-officedocument.presentationml.presentation |
| PPTXML | Microsoft PowerPoint XML Presentation | |
| PREXPORT | PREXPORT File | |
| PRF | PICS Rules File | application/pics-rules |
| PRFPSET | PRFPSET File | |
| PRINTEREXPORT | Printer Migration File | |
| PRM | Adobe Premiere Plugin | |
| PRMP | Adobe Premiere Plugin | |
| PRPRESET | PRPRESET File | |
| PRPROJ | Adobe Premiere Project | |
| PRSL | PRSL File | |
| PRST | InDesign Printer Presets | |
| PRTL | Adobe Premiere Title | |
| PS1 | Windows PowerShell Script | |
| PS1XML | Windows PowerShell XML Document | |
| PSB | PSB File | |
| PSC1 | Windows PowerShell Console File | application/PowerShell |
| PSD | Adobe Photoshop Image 13 | |
| PSD1 | Windows PowerShell Data File | |
| PSET | InDesign Plug-in Set | |
| PSF | PSF File | |
| PSM1 | Windows PowerShell Script Module | |
| PSP | PSP File | |
| PSSC | Windows PowerShell Session Configuration File | |
| PST | Outlook Data File | |
| PUB | Microsoft Publisher Document | application/vnd.ms-publisher |
| PUBHTML | PUBHTML File | |
| PUBMHTML | PUBMHTML File | |
| PWZ | Microsoft PowerPoint Wizard | application/vnd.ms-powerpoint |
| PXR | PXR File | |
| PY | Python File | text/plain |
| PYC | Compiled Python File | |
| PYD | Python Extension Module | |
| PYO | Compiled Python File | |
| PYW | Python File (no console) | text/plain |
| PYZ | Python Zip Application File | application/x-zip-compressed |
| PYZW | Python Zip Application File (no console) | application/x-zip-compressed |
| QDS | Directory Query | |
| R00 | WinRAR archive | |
| R01 | WinRAR archive | |
| R02 | WinRAR archive | |
| R03 | WinRAR archive | |
| R04 | WinRAR archive | |
| R05 | WinRAR archive | |
| R06 | WinRAR archive | |
| R07 | WinRAR archive | |
| R08 | WinRAR archive | |
| R09 | WinRAR archive | |
| R10 | WinRAR archive | |
| R11 | WinRAR archive | |
| R12 | WinRAR archive | |
| R13 | WinRAR archive | |
| R14 | WinRAR archive | |
| R15 | WinRAR archive | |
| R16 | WinRAR archive | |
| R17 | WinRAR archive | |
| R18 | WinRAR archive | |
| R19 | WinRAR archive | |
| R20 | WinRAR archive | |
| R21 | WinRAR archive | |
| R22 | WinRAR archive | |
| R23 | WinRAR archive | |
| R24 | WinRAR archive | |
| R25 | WinRAR archive | |
| R26 | WinRAR archive | |
| R27 | WinRAR archive | |
| R28 | WinRAR archive | |
| R29 | WinRAR archive | |
| RAR | WinRAR archive | |
| RAT | Rating System File | application/rat-file |
| RDP | Remote Desktop Connection | |
| REG | Registration Entries | |
| RELS | XML Document | |
| REM | REM File | |
| RESMONCFG | Resource Monitor Configuration | |
| RESX | RESX File | |
| REV | RAR recovery volume | |
| RLE | RLE File | |
| RLL | Application extension | |
| RMI | MIDI Sequence | audio/mid |
| RPLN | InDesign Required Component | |
| RQY | Microsoft Excel OLE DB Query File | text/x-ms-rqy |
| RTF | Rich Text Format | application/msword |
| SBX | Adobe Illustrator Tsume File | |
| SCF | File Explorer Command | |
| SCP | Text Document | |
| SCR | Screen saver | |
| SCT | SCT File | text/scriptlet |
| SEARCHCONNECTOR-MS | Search Connector | application/windows-search-connector+xml |
| SEARCH-MS | Saved Search | |
| SESX | Adobe Audition Session File | |
| SETTINGCONTENT-MS | Setting Content | |
| SFCACHE | ReadyBoost Cache File | |
| SHC | SHC File | |
| SHH | SHH File | |
| SHTM | SHTM File | |
| SHTML | SHTML File | |
| SLDM | Microsoft PowerPoint Macro-Enabled Slide | application/vnd.ms-powerpoint.slide.macroEnabled.12 |
| SLDX | Microsoft PowerPoint Slide | application/vnd.openxmlformats-officedocument.presentationml.slide |
| SLK | Microsoft Excel SLK Data Import Format | application/vnd.ms-excel |
| SMRD | Adobe Illustrator Filter | |
| SMWT | Adobe Sangam Writer | |
| SND | SND Audio File | audio/basic |
| SOAP | SOAP File | |
| SPC | PKCS #7 Certificates | application/x-pkcs7-certificates |
| SPL | Shockwave Flash Object | application/futuresplash |
| SPU | Adobe Encore Subtitle | |
| SRF | SRF File | |
| SST | Microsoft Serialised Certificate Store | application/vnd.ms-pki.certstore |
| STA | STA File | |
| STE | STE File | |
| STM | STM File | |
| SVG | SVG Document | image/svg+xml |
| SWF | Shockwave Flash Object | application/x-shockwave-flash |
| SWITCHBOARD | SWITCHBOARD File | |
| SYMLINK | .symlink | |
| SYS | System file | |
| TAR | WinRAR archive | application/x-tar |
| TAZ | WinRAR archive | |
| TBZ | WinRAR archive | |
| TBZ2 | WinRAR archive | |
| TGA | TGA File | image/targa |
| TGZ | WinRAR archive | application/x-compressed |
| THEME | Windows Theme File | |
| THEMEPACK | Windows Theme Pack File | |
| THMX | Microsoft Office Theme | application/vnd.ms-officetheme |
| TIF | TIF File | image/tiff |
| TIFF | TIFF File | image/tiff |
| TLZ | WinRAR archive | |
| TPL | TPL File | |
| TS | TS File | video/vnd.dlna.mpeg-tts |
| TTC | TrueType collection font file | |
| TTF | TrueType font file | |
| TTS | TTS File | video/vnd.dlna.mpeg-tts |
| TXT | Text Document | text/plain |
| TXZ | WinRAR archive | |
| U3D | U3D File | |
| UDC | InDesign User Dictionary | |
| UDL | Microsoft Data Link | |
| URL | Internet Shortcut | |
| UU | WinRAR archive | |
| UUE | WinRAR archive | |
| UXDC | UXDC File | |
| VBE | VBScript Encoded Script File | |
| VBOX | VirtualBox Machine Definition | application/x-virtualbox-vbox |
| VBOX-EXTPACK | VirtualBox Extension Pack | application/x-virtualbox-vbox-extpack |
| VBS | VBScript Script File | |
| VCF | vCalendar File | text/x-vcard |
| VCS | vCard File | |
| VDI | Virtual Disk Image | application/x-virtualbox-vdi |
| VDW | Microsoft Visio Document | application/vnd.ms-visio.viewer |
| VDX | Microsoft Visio Document | application/vnd.ms-visio.viewer |
| VHD | Virtual Hard Disk | application/x-virtualbox-vhd |
| VHDPMEM | Hard Disk Image File | |
| VHDX | Hard Disk Image File | |
| VMDK | Virtual Machine Disk Format | application/x-virtualbox-vmdk |
| VOC | VOC Audio File | |
| VOX | VOX Audio File | |
| VPR | VPR File | |
| VSD | Microsoft Visio Document | application/vnd.ms-visio.viewer |
| VSDM | Microsoft Visio Document | application/vnd.ms-visio.viewer |
| VSDX | Microsoft Visio Document | application/vnd.ms-visio.viewer |
| VSS | Microsoft Visio Document | application/vnd.ms-visio.viewer |
| VSSM | Microsoft Visio Document | application/vnd.ms-visio.viewer |
| VSSX | Microsoft Visio Document | application/vnd.ms-visio.viewer |
| VST | Microsoft Visio Document | application/vnd.ms-visio.viewer |
| VSTM | Microsoft Visio Document | application/vnd.ms-visio.viewer |
| VSTO | VSTO Deployment Manifest | application/x-ms-vsto |
| VSTX | Microsoft Visio Document | application/vnd.ms-visio.viewer |
| VSX | Microsoft Visio Document | application/vnd.ms-visio.viewer |
| VTX | Microsoft Visio Document | application/vnd.ms-visio.viewer |
| VV | VirtViewer connection file | application/x-virt-viewer |
| VXD | Virtual device driver | |
| WAB | WAB file | |
| WAV | WAV File | audio/wav |
| WAX | Windows Media Audio shortcut | audio/x-ms-wax |
| WBCAT | Windows Backup Catalogue File | |
| WBK | Microsoft Word Backup Document | application/msword |
| WCX | RemoteApp and Desktop Connections Configuration File | |
| WDP | WDP File | image/vnd.ms-photo |
| WEB | WEB File | |
| WEBPNP | Web Point And Print File | |
| WEBSITE | Pinned Site Shortcut | application/x-mswebsite |
| WIN | Adobe CMS Extension | |
| WIZ | Microsoft Word Wizard | application/msword |
| WIZHTML | Microsoft Access HTML Template | |
| WLL | WLL File | |
| WM | WM File | video/x-ms-wm |
| WMA | WMA File | audio/x-ms-wma |
| WMD | Windows Media Player Download Package | application/x-ms-wmd |
| WMDB | Windows Media Library | |
| WMF | WMF File | image/x-wmf |
| WMS | Windows Media Player Skin File | |
| WMV | WMV File | video/x-ms-wmv |
| WMX | Windows Media Audio/Video playlist | video/x-ms-wmx |
| WMZ | Windows Media Player Skin Package | application/x-ms-wmz |
| WPL | WPL File | application/vnd.ms-wpl |
| WSC | Windows Script Component | text/scriptlet |
| WSF | Windows Script File | |
| WSH | Windows Script Host Settings File | |
| WTX | Text Document | |
| WVX | Windows Media Audio/Video playlist | video/x-ms-wvx |
| X3F | X3F File | |
| XAML | Windows Markup File | application/xaml+xml |
| XBAP | XAML Browser Application | application/x-ms-xbap |
| XEVGENXML | XEVGENXML File | |
| XHT | XHTML Document | application/xhtml+xml |
| XHTML | XHTML Document | application/xhtml+xml |
| XLA | Microsoft Excel Add-In | application/vnd.ms-excel |
| XLAM | Microsoft Excel Add-In | application/vnd.ms-excel.addin.macroEnabled.12 |
| XLD | Microsoft Excel 5.0 DialogSheet | application/vnd.ms-excel |
| XLK | Microsoft Excel Backup File | application/vnd.ms-excel |
| XLL | Microsoft Excel XLL Add-In | application/vnd.ms-excel |
| XLM | Microsoft Excel 4.0 Macro | application/vnd.ms-excel |
| XLS | Microsoft Excel 97-2003 Worksheet | application/vnd.ms-excel |
| XLSB | Microsoft Excel Binary Worksheet | application/vnd.ms-excel.sheet.binary.macroEnabled.12 |
| XLSHTML | Microsoft Excel HTML Document | |
| XLSM | Microsoft Excel Macro-Enabled Worksheet | application/vnd.ms-excel.sheet.macroEnabled.12 |
| XLSMHTML | XLSMHTML File | |
| XLSX | Microsoft Excel Worksheet | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet |
| XLT | Microsoft Excel Template | application/vnd.ms-excel |
| XLTHTML | Microsoft Excel HTML Template | |
| XLTM | Microsoft Excel Macro-Enabled Template | application/vnd.ms-excel.template.macroEnabled.12 |
| XLTX | Microsoft Excel Template | application/vnd.openxmlformats-officedocument.spreadsheetml.template |
| XLW | Microsoft Excel Workspace | application/vnd.ms-excel |
| XLXML | Microsoft Excel XML Worksheet | |
| XML | XML Document | text/xml |
| XMP | Adobe Prelude XMP | |
| XRM-MS | XrML Digital Licence | text/xml |
| XSL | XSL Stylesheet | text/xml |
| XSLT | XSL Transformation | |
| XXE | WinRAR archive | |
| XZ | WinRAR archive | |
| Z | WinRAR archive | application/x-compress |
| ZFSENDTOTARGET | Compressed (zipped) Folder SendTo Target | |
| ZIP | WinRAR ZIP archive | application/x-zip-compressed |
| ZIPX | WinRAR archive | |
| ZXP | Adobe Zip Format Extension Package File | application/x-mmxp |