| File extension |
File description |
Developer/Producer |
| .!bt |
BitTorrent Incomplete Download File |
BitTorrent |
| .!qb |
qBittorrent Partial Download File |
qBittorrent |
| .!ut |
uTorrent Incomplete Download |
BitTorrent |
| .000 |
Windows CE Installation Data File |
Microsoft |
| .1 |
Unix Section 1 Man Page |
N/A |
| .323 |
H.323 Internet Telephony File |
N/A |
| .3dc |
RacerMate 3D Course File |
RacerMate |
| .83p |
TI-83 Calculator File |
Texas Instruments |
| .8xp |
TI-83 Plus Calculator File |
Texas Instruments |
| .aawdef |
Ad-Aware Definitions File |
Lavasoft |
| .abr |
Adobe Photoshop Brushes File |
Adobe Systems |
| .ac$ |
AutoCAD Temporary File |
Autodesk |
| .acb |
AOL Cab Launcher |
AOL |
| .acl |
AutoCorrect List File |
Microsoft |
| .acs |
Agent Character File |
Microsoft |
| .ad |
After Dark Screensaver |
Berkeley Systems |
| .adadownload |
Adobe Download Assistant Partial Download File |
Adobe Systems |
| .add |
Dynamics AX Developer Documentation File |
Microsoft |
| .adi |
Dynamics AX Developer Documentation Index File |
Microsoft |
| .adm |
Portfolio Admin-Level Access Flag |
N/A |
| .aepkey |
Advanced Encryption Package Key File |
InterCrypto |
| .afploc |
Apple Filing Protocol Location |
Apple |
| .agd |
Agile Advantage E-mail Attachment |
Oracle |
| .ahd |
Dynamics AX Online Help Data File |
Microsoft |
| .ahi |
Dynamics AX Online Help Index File |
Microsoft |
| .aif |
Symbian Application Information File |
Symbian |
| .aim |
AOL Instant Messenger Launch File |
AOL |
| .alt |
Dynamics AX Temporary File |
Microsoft |
| .aml |
Microsoft Assistance Markup Language File |
Microsoft |
| .annot |
Adobe Digital Editions Annotations File |
Adobe Systems |
| .aod |
Dynamics AX Object Data File |
Microsoft |
| .aoi |
Dynamics AX Application Object Index File |
Microsoft |
| .aol |
America Online File |
AOL |
| .apf |
Adobe Profile File |
Adobe Systems |
| .appdownload |
Mac App Store Partially Downloaded App |
Apple |
| .appup |
Erlang Application Upgrade File |
Erlang |
| .arr |
Advanced RAR Password Recovery Project |
Elcomsoft |
| .ash |
Nintendo Wii System Menu File |
N/A |
| .ass |
Aegisub Advanced Substation Alpha File |
N/A |
| .atz |
Atomic Time Zone File |
N/A |
| .auz |
Ableton Authorization File |
Ableton |
| .avastlic |
Avast! License File |
AVAST Software |
| .avgdx |
AVG Diagnostics File |
AVG Technologies |
| .awc |
Emulex AWC Firmware Update File |
Emulex |
| .awd |
Award BIOS Update File |
ASUS |
| .awkw |
Awkwords Word Generator File |
Awkwords |
| .az! |
Vuze Partial Download File |
Vuze |
| .bbl |
BibTeX Generated Bibliography File |
Oren Patashnik |
| .bc |
BitComet Partially Downloaded File |
BitComet |
| .bc! |
BitComet Incomplete File |
BitComet |
| .bdr |
Publisher Borders File |
Microsoft |
| .bfc |
Windows Briefcase File |
N/A |
| .bkmk |
Yummy FTP Bookmark File |
Yummy Software |
| .bmc |
Embroidery Image File |
N/A |
| .bmk |
Nokia Device Bookmark File |
Nokia |
| .bnd |
DB2 CLI Bind File |
IBM |
| .bootskin |
Stardock Bootskin File |
Stardock |
| .box |
Microsoft Store Download File |
Microsoft |
| .bp2 |
AutoCAD Batch Plot File |
N/A |
| .bp3 |
AutoCAD Batch Plot File |
N/A |
| .bpdx |
Acrobat Batch PDX File |
Adobe Systems |
| .bpl |
AutoCAD Batch Plot File |
N/A |
| .bps |
BPS Virus File |
N/A |
| .bqy |
Brio Query File |
Brio Software |
| .bst |
BibTeX Style Document |
N/A |
| .bt! |
BitSpirit Incomplete Download File |
BitSpirit |
| .buf |
Buffer File |
N/A |
| .bup |
McAfee Quarantined File |
McAfee |
| .c2u |
Texas Instruments CBL 2 OS File |
Texas Instruments |
| .ca |
Initial Telnet Cache |
N/A |
| .cache |
Cache File |
N/A |
| .calb |
Coolect Album File |
Coolect |
| .calibre |
Calibre Device Data File |
Calibre |
| .cas |
Autodesk Cascade License File |
Autodesk |
| .cbds |
Comic Book DS File |
Nicom00k |
| .cbt |
Computer Based Training File |
Microsoft |
| .cch |
.NET Security Resolution Cache File |
Microsoft |
| .cdf-ms |
ClickOnce Compiled Manifest File |
Microsoft |
| .cfl |
IMVU Product File |
IMVU |
| .cfs |
Lucene Compound Index File |
Apache |
| .chk |
Saved File Fragment |
Microsoft |
| .chunk001 |
File Splitter Split Archive Part 1 |
Filesplitter.org |
| .chw |
Compiled Help Index File |
Microsoft |
| .cl |
Cursor Library |
Aha-Soft |
| .clkk |
Clicker Keyboard |
Crick Software |
| .clkt |
Clicker Template |
Crick Software |
| .clkw |
Clicker Word Bank |
Crick Software |
| .clkx |
Clicker Grid Set |
Crick Software |
| .clr |
Flash Color Set |
Adobe Systems |
| .cls |
LaTeX Document Class File |
N/A |
| .cml |
CryptoMailer Encrypted File |
TheGreenBow |
| .cmm |
Corel Multimedia Manager Album |
Corel |
| .contour |
Contour Screenplay File |
Mariner Software |
| .cos2 |
Pinnacle Studio Cache File |
Pinnacle Systems |
| .cp3 |
Grand Prix 3 Cockpit Shape File |
Microprose |
| .cpt |
Pocket Slides Presentation |
N/A |
| .crashed |
AbiWord Crash-Saved Document |
AbiSource |
| .crc |
Total Commander Checksum File |
Ghisler Software |
| .crd |
Windows CardSpace File |
Microsoft |
| .crdownload |
Chrome Partially Downloaded File |
Google |
| .csh |
Photoshop Custom Shapes File |
Adobe Systems |
| .ctf |
AVG Update Control File |
AVG Technologies |
| .ctg |
Canon Digital Camera Catalog File |
Canon |
| .cul |
Windows Cursor Library |
N/A |
| .cvf |
CPU-Z Validation File |
CPUID |
| .cvr |
Microsoft Crash Report File |
Microsoft |
| .cxf |
Picasa Collage File |
Google |
| .da2 |
Ad-Aware License File |
Lavasoft |
| .dal |
Download Accelerator Plus URL List |
SpeedBit |
| .dap |
Download Accelerator Plus Partial Download |
SpeedBit |
| .dat |
Exchange E-mail Attachment |
Microsoft |
| .db |
Windows Thumbnail Cache |
Microsoft |
| .dbx |
Outlook Express E-mail Folder |
Microsoft |
| .dc1 |
Bloomba E-mail Message |
Yahoo! |
| .dcover |
Disc Cover File |
BeLight Software |
| .dct |
Dictionary File |
N/A |
| .dctmp |
DC++ Partially Downloaded File |
DC++ |
| .decrypt |
Decrypted Microsoft ESD File |
Microsoft |
| .dek |
Memorize-It Flashcard Deck |
Side-Eight Software |
| .desktop |
Desktop Entry File |
N/A |
| .devicesalt |
NOOK Device Salt File |
Barnes & Noble |
| .dfu |
LaTeX Font Encoding File |
N/A |
| .dgc |
TurboTax Tax Form |
N/A |
| .dic |
Dictionary File |
N/A |
| .disabled |
Spybot - Search & Destroy Disabled File |
Safer Networking |
| .diskdefines |
Linux LiveCD Information File |
N/A |
| .dke |
DriveLock FDE Disk Key File |
CenterTools |
| .dlm |
Akamai Download Manager File |
Akamai |
| .dmx-info |
DriverMax Driver Information File |
Innovative Solutions |
| .downloading |
Pando Incomplete Download File |
Pando Networks |
| .dpb |
FaxMaster Document |
N/A |
| .dr |
DRM Rights Object |
N/A |
| .drc |
DRM Rights Object |
N/A |
| .dsc |
Nikon Disk Identification File |
Nikon |
| .dskin |
DockX Skin |
Mr. Gecko |
| .dstudio |
DownloadStudio Incomplete Download |
Conceiva |
| .dtapart |
DownThemAll! Partially Downloaded File |
MMIV-MMVII |
| .dtf |
Domino Temporary File |
IBM |
| .dt_ |
Macintosh Data Fork |
N/A |
| .dump |
Google BreakPad Crash Log File |
Google |
| .dus |
Readiris Font Dictionary |
I.R.I.S. |
| .dwc |
Emulex DWC Firmware Update File |
Emulex |
| .dwl |
TurboCAD Drawing Lock File |
IMSI |
| .dwlibrary |
Paperless Document Library |
Mariner Software |
| .dwn |
Firmware Update File |
N/A |
| .ebn |
Philips Firmware Update File |
Philips |
| .edc |
Kryptel Lite Encrypted File |
Inv Softworks |
| .eek |
Arachne Network-Enabled Script |
Arachne |
| .ef2 |
Internet Download Manager Export File |
Tonec |
| .efl |
External Format Language File |
NFB |
| .email |
Outlook Express Email Message |
N/A |
| .enc |
Encore Musical Notation File |
GVOX |
| .enf |
EndNote Filter File |
Thomson Reuters |
| .enml |
Evernote for Android Note |
Evernote |
| .eqn |
WordPerfect Equation |
Corel |
| .erl |
GameGuard Error Log File |
nProtect |
| .err |
AutoCAD Error Log File |
Autodesk |
| .esd |
Windows Electronic Software Download File |
Microsoft |
| .event |
Corel Cataloged Folder File |
Corel |
| .exd |
Control Information Cache File |
Microsoft |
| .ext |
Generic Email Attachment |
N/A |
| .extra |
Google BreakPad Crash Log Extra File |
Google |
| .eyb |
Microsoft Encarta Yearbook Update File |
Microsoft |
| .ezlog |
Skype Extras Manager Log File |
Skype |
| .ezw |
easyOFFER Real Estate Form File |
Reagency Systems |
| .fb! |
FlashGet Incomplete Download File |
FlashGet |
| .fdr |
Windows Error Report File |
Windows |
| .feedback |
Expression SketchFlow Feedback File |
Microsoft |
| .ffl |
Fetion Emoticons Package |
China Mobile |
| .file |
Generic Windows File |
N/A |
| .fl3 |
Flash 3D File |
Adobe Systems |
| .flf |
Microsoft Dynamics NAV License File |
Microsoft |
| .fmelic |
FME License File |
Safe Software |
| .fnd |
Windows Saved Search |
Microsoft |
| .fnlf |
Scarlett Plug-in Suite License File |
Focusrite |
| .fpfv |
File Protected From Virus |
Intermedia |
| .fpk |
JetForm FormFlow File |
Adobe Systems |
| .frk |
Macintosh Resource or Data Fork |
N/A |
| .frm |
Form File |
N/A |
| .frz |
Locked FormFlow File |
N/A |
| .ftil |
e-Hastakshar Contract Note |
FTIL |
| .ftploc |
FTP Location |
N/A |
| .fw |
Firmware Update File |
N/A |
| .g3a |
Casio Prizm Add-in File |
Casio |
| .gau |
Flight Simulator Gauge File |
Microsoft |
| .gg |
Google Desktop Gadget File |
Google |
| .glink |
Google Drive External File Shortcut |
Google |
| .gly |
Word Glossary File |
Microsoft |
| .god |
God Configuration File |
Synbioz |
| .gp4 |
Guitar Pro 4 Tablature |
Arobas Music |
| .gpg |
GNU Privacy Guard Public Keyring |
Free Software Foundation |
| .growlregdict |
Growl Temp File |
Growl Team |
| .gta |
Microsoft Groove Tool Archive |
Microsoft |
| .h1q |
Microsoft Help Merged Query Index File |
Microsoft |
| .hdk |
HotDocs Registration File |
HotDocs |
| .hdx |
Delphi MultiHelp Index File |
Autodesk |
| .hex |
Hexadecimal Source File |
N/A |
| .hlb |
VMS / VAX Help Library |
N/A |
| .hlx |
ATI Radeon Video Driver Support File |
N/A |
| .hmx |
Help & Manual 4 Project |
EC Software |
| .hps |
HP Digital Sender Metadata File |
HP |
| .hs |
Motorola Flash Flex File |
Motorola |
| .hxa |
Microsoft Help 2 Attribute Definition File |
Microsoft |
| .hxc |
Microsoft Help 2 Collection Definition File |
Microsoft |
| .hxe |
Microsoft Help 2 Sample Definition File |
Microsoft |
| .hxk |
Microsoft Help 2 Index File |
Microsoft |
| .hxt |
Microsoft Help 2 Table of Contents File |
Microsoft |
| .hyp |
Dictionary Information File |
Adobe Systems |
| .ical |
iCalendar File |
N/A |
| .icalendar |
iCalendar File |
N/A |
| .icma |
InCopy Assignment File |
Adobe Systems |
| .icontainer |
CandyBar iContainer File |
Panic |
| .ics |
iCalendar File |
N/A |
| .id |
Lotus Notes User ID File |
IBM |
| .idlk |
Adobe InDesign Lock File |
Adobe Systems |
| .idx |
Movie Subtitle File |
N/A |
| .ifl |
3ds Max Image File List |
Autodesk |
| .iix |
Translation Memory Index File |
SDL |
| .imapmbox |
IMAP Mailbox |
Apple |
| .iml |
ACT! Internet Mail Message |
Sage Software |
| .imy |
iMelody Ringtone File |
N/A |
| .in |
Spyware File |
N/A |
| .inca |
InCopy CS3 Assignment File |
Adobe Systems |
| .ind |
Memory Stick Formatting File |
Sony |
| .indk |
Adobe InDesign Shortcut Set File |
Adobe Systems |
| .inetloc |
Internet Location |
N/A |
| .info |
Generic Information File |
N/A |
| .ing |
MasterCook Ingredients File |
N/A |
| .inlk |
Adobe InDesign Lock File |
Adobe Systems |
| .inm |
FaxMaster Document |
N/A |
| .iobit |
Advanced SystemCare Rollback File |
IObit |
| .ipsw |
iPod and iPhone Software Update File |
Apple |
| .isn |
Installer Source Files |
N/A |
| .itc |
iTunes Cover Flow Data File |
Apple |
| .iva |
Dementia.4207 Virus File |
N/A |
| .iws |
InstallWatch Scan File |
N/A |
| .jad |
Java Application Descriptor File |
Oracle |
| .jc |
FlashGet Partial Download |
FlashGet |
| .jc! |
FlashGet Incomplete Download |
FlashGet |
| .jrs |
Exchange Reserve Transaction Log File |
Microsoft |
| .key |
Software License Key File |
N/A |
| .khd |
Dynamics AX Kernel Help Data File |
Microsoft |
| .khi |
Dynamics AX Kernel Help Index File |
Microsoft |
| .kmr |
KnowledgeMill Link File |
KnowledgeMill |
| .kwm |
WebMoney Key File |
WebMoney |
| .kyr |
Lotus Domino Key Ring File |
IBM |
| .lay |
DVD Studio Pro Layout File |
Apple |
| .lck |
Program Lock File |
N/A |
| .ldb |
Microsoft Access Lock File |
Microsoft |
| .legal |
DaveTech Legal Document |
DaveTech |
| .letter |
Undeliverable Mail File |
N/A |
| .lic |
Software License File |
N/A |
| .licensekey |
iPartition License Key File |
Coriolis Systems |
| .lid |
Kodak EasyShare Album File |
Kodak |
| .link |
iPod Link File |
N/A |
| .linx |
iPod Links Folder |
N/A |
| .lock |
Lock File |
N/A |
| .logonvista |
LogonStudio Windows Vista Logon Screen |
Stardock |
| .logonxp |
LogonStudio Windows XP Logon Screen |
Stardock |
| .loov |
Smadav Virus Definitions File |
Smadsoft |
| .lrc |
Lyrics File |
N/A |
| .lrs |
Check Point License Request File |
Check Point Software Technologies |
| .lsn |
Finale Lesson File |
MakeMusic |
| .ltf |
Frogans Shortcut File |
STG Interactive |
| .lwtp |
LimeWire Theme Pack |
LimeWire |
| .lxa |
Microsoft Speech Lexicon File |
Microsoft |
| .lyr |
ArcView Layer File |
ESRI |
| .mab |
Mozilla Address Book |
Mozilla |
| .mad |
Access Module Shortcut |
Microsoft |
| .mag |
Access Diagram Shortcut File |
Microsoft |
| .mailplanelicense |
Mailplane License File |
uncomplex |
| .mailtoloc |
Mail Internet Location File |
Apple |
| .manifest |
Steam Manifest File |
Valve |
| .map |
TECkit Mapping File |
SIL International |
| .mar |
Mozilla Archive |
Mozilla |
| .mat |
Microsoft Access Table Shortcut File |
Microsoft |
| .mau |
Media Attachment Unit |
N/A |
| .mb |
Kodak EasyShare Data File |
Kodak |
| .mbb |
Kodak EasyShare Data File |
Kodak |
| .mbs |
Opera Mailbox File |
Opera Software |
| .mc2 |
MasterCook 5 Cookbook File |
ValuSoft |
| .mcf |
MasterCook 2 Cookbook File |
ValuSoft |
| .mcfi |
Maya Initial Fluid Cache File |
Autodesk |
| .mcfp |
Maya Fluid Cache Playback File |
Autodesk |
| .mci |
Media Control Interface File |
N/A |
| .mco |
Live Messenger Winks File |
Microsoft |
| .md0 |
Adobe Photoshop Metadata Cache File |
Adobe Systems |
| .md5 |
MD5 Checksum File |
N/A |
| .mdf |
Translation Memory Data Find File |
SDL |
| .mdl |
Flight Simulator Airplane Model |
N/A |
| .mdw |
Access Workgroup File |
N/A |
| .me |
Temporary Delete Me File |
N/A |
| .merlinlicense |
Merlin License File |
ProjectWizards |
| .mfil |
Blizzard Software Update File |
Blizzard Entertainment |
| .mgdatabase |
MacGourmet Deluxe Database File |
Mariner Software |
| .mgo |
MacGourmet Recipe File |
Mariner Software |
| .mgt |
Musicnotes Guitar Guru Song File |
Musicnotes |
| .mif |
Management Information Format |
N/A |
| .mjdoc |
MacJournal Document |
Mariner Software |
| .mls |
CrystalPlayer Playlist |
Crystal Reality |
| .mmo |
Memory Map Overlay File |
Memory-Map |
| .mnl |
AutoCAD Menu LISP File |
Autodesk |
| .mnx |
FoxPro Menu |
N/A |
| .mobileprovision |
Xcode Mobile Provisioning Profile |
Apple |
| .montage |
Montage Screenplay File |
Mariner Software |
| .mpcpl |
Media Player Classic Playlist |
Media Player Classic |
| .mrk |
DPOF Auto Print Order File |
N/A |
| .ms-tnef |
MS Transport Neutral Encapsulation Format |
Microsoft |
| .msf |
Mail Summary File |
N/A |
| .msi |
Windows Installer Package |
Microsoft |
| .mso |
Inline E-mail Attachment |
Microsoft |
| .msrcincident |
Windows Remote Assistance Invitation File |
Microsoft |
| .msu |
Windows Vista Update Package |
Microsoft |
| .mta |
Samsung AllShare Metadata File |
Samsung |
| .mtd |
Musicnotes Digital Sheet Music File |
Musicnotes |
| .mtf |
MasterCook Tips |
N/A |
| .mvi |
AutoCAD Movie Command File |
Autodesk |
| .mwf |
Translation Memory Word Find File |
SDL |
| .mwlic |
MoneyWell License File |
No Thirst Software |
| .mxn |
Miinoto Exchangeable Note File |
Mobiiko |
| .mzz |
Microsoft .NET Download Package |
Microsoft |
| .na2 |
Netscape Address Book File |
Mozilla |
| .nav |
MSN Application Extension File |
Microsoft |
| .nav2 |
WinAVI Temporary Navigation File |
ZJMedia |
| .nch |
Outlook Express Folder File |
Microsoft |
| .ncw |
Nero CoverDesigner Wizard File |
Nero |
| .nd5 |
Renamed NDS File |
N/A |
| .ndl |
Lotus Notes Doclink File |
IBM |
| .nfs |
Network File System Temporary File |
N/A |
| .nick |
Outlook 2000 Nickname File |
Microsoft |
| .njb |
Nikon Photo Index File |
Nikon |
| .nk2 |
Outlook 2002 Nickname File |
Microsoft |
| .nomedia |
Android No Media File |
N/A |
| .nss |
Magentic Screensaver File |
IncrediMail |
| .ntf |
MediaFACE II CD Label File |
NEATO |
| .nth |
Nokia Series 40 Theme File |
Nokia |
| .nup |
Smart Security Update File |
ESET |
| .nvi |
NVIDIA Driver File |
NVIDIA |
| .nwm |
Sony NWM Display Screen File |
N/A |
| .nwp |
Magentic Wallpaper File |
IncrediMail |
| .ob! |
Orbit Downloader Incomplete Download |
Orbit Downloader |
| .ocr |
Subtitle Workshop OCR Script |
URUSoft |
| .odf |
OpenDocument Formula |
Oracle |
| .ods |
Outlook Express 5 Mailbox |
Microsoft |
| .ofr |
SMS Offer Manager File |
Microsoft |
| .olb |
OLE Object Library |
Microsoft |
| .ook |
Arachne Batch Script |
Arachne |
| .opdownload |
Opera Partially Downloaded File |
Opera Software |
| .opf |
FlipAlbum File |
E-Book Systems |
| .ost |
Outlook Offline Folder File |
Microsoft |
| .otc |
OpenDocument Chart Template |
OASIS |
| .otf |
OpenDocument Formula Template |
Oracle |
| .owg |
OutWit Gear Database |
OutWit Technologies |
| .owm |
OutWit XML Mashup File |
OutWit Technologies |
| .p10 |
Certificate Request File |
N/A |
| .p2p |
FolderShare Placeholder File |
Microsoft |
| .p7m |
Digitally Encrypted Message |
N/A |
| .p7r |
Certificate Request Response File |
N/A |
| .pad |
ACT! Database Pointer File |
The Sage Group |
| .pakm |
PAKM Package File |
Janki Software |
| .pamp |
Poweramp Album Art File |
Poweramp |
| .pando |
Pando File |
N/A |
| .pap |
Corel Painter Paper Texture |
Corel |
| .part |
Partially Downloaded File |
N/A |
| .partial |
Internet Explorer Partially Downloaded File |
Microsoft |
| .pes |
Brother Embroidery Format |
N/A |
| .pgp |
PGP Security Key |
PGP |
| .pid |
Process ID File |
N/A |
| .pkpass |
Passbook Pass File |
Apple |
| .pla |
iriver iQuickList File |
iriver |
| .playset |
Souptoys Playset File |
Souptoys |
| .plf |
Papyrus License File |
Papyrus Software |
| .plsk |
Messenger Plus! Live Skin Pack |
Patchou |
| .pn |
Powernoodle File |
Powernoodle |
| .ppf |
Paint Shop Pro Soft Plastic Preset File |
Corel |
| .ppk |
PuTTY Private Key File |
PuTTY |
| .ppm_b |
Nokia PPM Flash File |
Nokia |
| .prs |
PlayStation Radio Player Location |
Sony |
| .psar |
PSP Update File |
Sony |
| .psf |
HP-UX Product Specification File |
Hewlett-Packard |
| .psi |
PrimalScript Online Help Shortcut |
Sapien Technologies |
| .pss |
Picture and Sound Show File |
N/A |
| .psw |
Windows Password Reset Disk File |
Microsoft |
| .pt |
Panther Project File |
The Panther Team |
| .pth |
4D Path Document |
N/A |
| .ptr |
Flash Intro Project File |
N/A |
| .pvk |
Private Key File |
Microsoft |
| .pvm |
HP Photo Album |
HP |
| .qds |
Windows Directory Query File |
Microsoft |
| .qua |
Avira AntiVir Quarantined File |
Avira Operations |
| .qwq |
OpenQwaq Auto-Launch File |
OpenQwaq |
| .qxl |
QuarkXPress Library |
Quark Software |
| .radiumkey2 |
Radium 2 License File |
CatPig Studios |
| .raskinlicense |
Raskin License File |
Raskin Software |
| .rat |
PICS Rating File |
W3C |
| .redir |
Spotify Executable Redirect File |
Spotify |
| .reloc |
Windows EXE Relocation Section File |
Microsoft |
| .rem |
BlackBerry Encrypted Data File |
Research In Motion |
| .req |
SSL Certificate Request File |
N/A |
| .rfb |
RoboForm Bookmark File |
Siber Systems |
| .rfc |
RoboForm Contact File |
Siber Systems |
| .rfn |
RoboForm Safenote File |
Siber Systems |
| .rfp |
RoboForm Passcard File |
Siber Systems |
| .rft |
RoboForm Identity File |
Siber Systems |
| .rjs |
RealJukebox Skin File |
RealNetworks |
| .rmf |
Adobe Rights Management Document |
Adobe Systems |
| .rml |
Elixir Report Template File |
Elixir Technology |
| .rnd |
PGP Random Seed File |
PGP |
| .rom |
Read Only Memory Image |
N/A |
| .rov |
Report Object Variable |
N/A |
| .rpmsg |
Outlook Restricted Permission Message |
Microsoft |
| .rsa |
RSA Certificate File |
N/A |
| .rtc |
Live Meeting Connection File |
Microsoft |
| .rtm |
LabVIEW Run-Time Menu File |
National Instruments |
| .rtp |
TurboTax Update File |
N/A |
| .rwlibrary |
Paperless Receipt Library |
Mariner Software |
| .rwz |
Outlook Rules Wizard File |
Microsoft |
| .rxc |
Roxio Certificate File |
Sonic Solutions |
| .sbc |
Office Accounting Company Shortcut File |
Microsoft |
| .sbk |
Multimedia ToolBook System Book |
Asymetrix |
| .sc |
Space Engine Script |
Space Engine |
| .sc2locale |
Blizzard StarCraft 2 Localization File |
Blizzard Entertainment |
| .scw |
Score Writer Document |
N/A |
| .sdr |
Dell Support File |
Dell |
| .sdx |
Kivuto Secure Download Manager File |
Kivuto Solutions |
| .search-ms |
Windows Saved Search File |
Microsoft |
| .sec |
PGP Secret Key Ring |
N/A |
| .secure |
Septium Secure Document |
Septium |
| .sf |
Minecraft JAR Signature File |
Mojang |
| .sft |
Microsoft App-V Sequencer File |
Microsoft |
| .sfv |
Simple File Verification File |
N/A |
| .sha1 |
SHA-1 Hash File |
N/A |
| .sha256 |
FileVerifier++ SHA-256 Hashes File |
FileVerifier++ |
| .sha512 |
SHA 512 Hash File |
N/A |
| .shortcut |
Asutype Shortcut |
Fanix Software |
| .shs |
Microsoft Scrap File |
Microsoft |
| .shv |
Husqvarna Viking Embroidery File |
Husqvarna Viking |
| .shx |
Motorola Flash Superfile |
Motorola |
| .sidb |
iTunes Authorization Data File |
Apple |
| .sidd |
iTunes Authorization Data File |
Apple |
| .sis |
Symbian Installation File |
Symbian |
| .sis.dm |
Ovi Store DRM-Protected Application |
Nokia |
| .sisx |
Symbian OS Installation File |
Symbian |
| .sisx.dm |
Nokia Ovi Store DRM-Protected Application |
Nokia |
| .sk |
Safari History Index File |
Apple |
| .skindex |
Mail Index File |
N/A |
| .skr |
PGP Private Keyring |
N/A |
| .slb |
AutoCAD Slide Library |
Autodesk |
| .slf |
Symantec License File |
Symantec |
| .sls |
Image Playlist |
N/A |
| .slupkg-ms |
XrML Digital License Package |
Microsoft |
| .smrd |
Adobe InDesign Filter File |
Adobe Systems |
| .smwt |
Adobe InDesign Filter |
Adobe Systems |
| .snm |
Netscape Mail Index |
N/A |
| .snt |
Sticky Notes File |
Microsoft |
| .spd |
Form·Z Suspended Render File |
AutoDesSys |
| .spk |
Synology Package |
Synology |
| .sr0 |
SecuROM Analysis File |
Sony |
| .srg |
Ketron Single Registration File |
Ketron |
| .ssc |
Stellarium Script |
The Stellarium Team |
| .ssd |
WindowBlinds Skin File List |
Stardock |
| .sslf |
HLSW Shared Server List File |
N/A |
| .sst |
Serialized Certificate Store File |
Microsoft |
| .ssw |
Sony Ericsson Firmware File |
SETool2 |
| .std |
CD/DVD Label Template |
Memorex |
| .sth |
Lotus Domino Stash File |
IBM |
| .stmb |
Synclavier Timbre File |
Synclavier Digital |
| .storymill |
StoryMill Project File |
Mariner Software |
| .sum |
Garmin Checksum File |
Garmin |
| .svn-work |
Subversion Cache File |
CollabNet |
| .swj |
SolidWorks Journal File |
Dassault Systemes |
| .swp |
Vi Swap File |
Bill Joy |
| .sxm |
StarMath Formula |
Oracle |
| .t$m |
AVG Internet Security Temporary File |
Grisoft |
| .tag |
DataFlex Query Tag |
N/A |
| .tbs |
TuneUp Utilities Boot Screen |
TuneUp Corporation |
| .tcr |
TouchMagix Creative Suite Published File |
TouchMagix Media |
| .tcz |
Tiny Core File |
Linux |
| .td |
Thunder Incomplete Download File |
Thunder Network Technologies |
| .tdl |
MathType Translator Definition Language |
N/A |
| .tec |
TECkit Compiled Mapping File |
SIL International |
| .temp |
Temporary (Temp) File |
N/A |
| .tfil |
Blizzard Software Update File |
Blizzard Entertainment |
| .thm |
Sony Ericsson Theme File |
Sony Ericsson |
| .tip |
TuneUp Utilities Icon Package |
TuneUp Corporation |
| .tko |
Win32/Oficla Trojan File |
N/A |
| .tla |
TuneUp Utilities Startup Logo |
TuneUp Corporation |
| .tlb |
OLE Type Library |
Microsoft |
| .tls |
TuneUp Utilities Logon Screen |
TuneUp Corporation |
| .tmb |
Timbuktu Pro Connection Document |
Netopia |
| .tmpl |
Xfire User Interface Template |
Xfire |
| .tnef |
Transport Neutral Encapsulation Format |
Microsoft |
| .tnsp |
TI-Nspire PublishView Document |
Texas Instruments |
| .toc |
Eudora Table of Contents |
QUALCOMM |
| .torrent |
BitTorrent File |
BitTorrent |
| .tpl |
Document Template |
N/A |
| .tpm |
Trusted Platform Module Password File |
Microsoft |
| .trace |
VMware ThinApp Trace Log File |
VMware |
| .tstream |
SwarmPlayer Streaming Torrent |
p2p-next consortium |
| .ttx |
Trados TagEditor File |
SDL |
| .tvl |
TurboTax File |
N/A |
| .uds |
NetBackup UNIX Domain Socket File |
Symantec |
| .uls |
NetMeeting User Location Service File |
Microsoft |
| .unk |
Unknown File |
N/A |
| .unknown |
Unknown File Type |
N/A |
| .unl |
Garmin Unlock File |
Garmin |
| .upg |
Upgrade File |
N/A |
| .urr |
Uniface Signatures File |
Compuware |
| .vbt |
Spyware Doctor Temporary Scan File |
PC Tools |
| .vdi |
StepMania Debug Resource File |
StepMania |
| .vdjsend |
VirtualDJ Send File |
Atomix Productions |
| .ver |
Version Record |
N/A |
| .vfs |
Virtual File System Index |
N/A |
| .vir |
Virus-Infected File |
Symantec |
| .vlcl |
VMware Localization File |
VMware |
| .vmdk-converttmp |
VMWare Fusion Temporary File |
VMWare |
| .vmf_autosave |
Valve Hammer Editor Autosave File |
Valve |
| .vmg |
Nokia Text Message |
Nokia |
| .vmhf |
VMware Hot Fix File |
VMware |
| .vmhr |
VMware Hot Fix Request File |
VMware |
| .vmsg |
VMware Application Message File |
VMware |
| .vncloc |
Screen Sharing VNC Internet Location |
Apple |
| .vol |
Volfs File System Directory |
N/A |
| .vor |
StarOffice Template |
Sun Microsystem |
| .vpa |
VPchat Chat Gestures File |
Halsoft |
| .vpc6 |
Virtual Machine Package |
Microsoft |
| .vpc7 |
Virtual Machine Package |
Microsoft |
| .vs |
Vivid Include File |
N/A |
| .w |
Google Toolbar Search History File |
Google |
| .wal |
Winamp Modern Skin |
N/A |
| .wba |
WindowBlinds Compressed Skin |
Stardock |
| .wcm |
Microsoft Works Communications Script |
Microsoft |
| .wdseml |
Thunderbird Searchable Email File |
Mozilla |
| .wgs |
Walk-Graph Segment File |
ChannelAdvisor |
| .wje |
WinJournal Entry |
Mariner Software |
| .wjf |
WinJournal Journal File |
Mariner Software |
| .wlx |
Windows Live Mesh Sync File |
Microsoft |
| .wordlist |
Desktop Poet Word List File |
Mariner Software |
| .wsz |
Winamp Classic Skin |
N/A |
| .wtc |
Logitech Webcam File |
Logitech |
| .wul |
WinUHA Language File |
WinUHA |
| .wwd |
Works Wizard File |
Microsoft |
| .wzmul |
WinZip Registration File |
Corel |
| .xensearch |
XenCenter Saved Search File |
Citrix |
| .xlnk |
XML Shortcut File |
N/A |
| .xlw |
Excel Workspace File |
Microsoft |
| .xmp |
Extensible Metadata Platform File |
Adobe Systems |
| .xnk |
Exchange Shortcut |
N/A |
| .xol |
PowerDesigner Object Language File |
Sybase |
| .xpr |
PressIt Disc Label |
Medea International |
| .xslic |
XenServer License File |
Citrix |
| .xwf |
OmniPage Workflow File |
Nuance Communications |
| .xxx |
Compucon Singer Embroidery File |
Compucon USA |
| .ybd |
YobiDrive Link File |
EZC Group |
| .ybk |
Microsoft Encarta Yearbook File |
Microsoft |
| .ymg |
Yahoo! Messenger File |
Yahoo! |
| .yps |
Yahoo! Messenger Data File |
Yahoo! |
| .z1 |
ZoneAlarm Renamed VB File |
Check Point Software Technologies |
| .zm1 |
ZoneAlarm Renamed MDA File |
Check Point |
| .zm2 |
ZoneAlarm Renamed MDZ File |
Check Point |
| .zm3 |
ZoneAlarm Renamed NCH File |
Check Point |
| .zm9 |
ZoneAlarm MailSafe Renamed Zip File |
Check Point Software Technologies |
| .zml |
Zooming Markup Language File |
Zoomorama |
| .ztf |
DVD Label Template File |
Avanquest |
| .ztr |
DVD Label Template Media File |
Avanquest |
| .zvpl |
Visual Paradigm License File |
Visual Paradigm |
| .zzz |
CCleaner Securely Deleted File |
Piriform |
| ._eml |
Windows Live Mail Email File |
Microsoft |
| ._nws |
Windows Live Mail Newsgroup Copy File |
Microsoft |
