The file extension list you requested is shown on this page. It loads as a table so please give it a moment as some of the lists are quite long. These lists contain basic information: the extension, the name of the program it works with, the specific function of the file, and the company that makes the program. Not all extensions have all of the data. Click on the extension of interest to see the detail page for that extension. Total extensions in this particular list: 346.
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| Extension |
Information |
| J |
JPEG / JFIF Image |
| J |
JAR Compressed File |
| J |
Java Source Code (Sun) |
| J1 |
EDIT Compiler JEDEC Boundary File |
| J2A |
Jazz Jackrabbit 2 Animation Library (Epic MegaGames Inc.) |
| J2B |
Jazz Jackrabbit 2 Music File (Epic MegaGames, Inc.) |
| J2D |
Jazz Jackrabbit Data File (Epic MegaGames, Inc.) |
| J2E |
Jazz Jackrabbit 2 Episode File (Epic MegaGames, Inc.) |
| J2G |
J2 Fax File |
| J2H |
Jazz Jackrabbit 2 High Scores (Epic MegaGames, Inc.) |
| J2I |
Jazz Jackrabbit 2 Internet Server Link (Epic MegaGames, Inc.) |
| J2K |
JPEG-2000 JP2 File |
| J2L |
Jaxx Creation Station Level File (Epic MegaGames Inc.) |
| J2M |
Jazz Jackrabbit 2 Recorded Macro (Epic MegaGames, Inc.) |
| J2S |
Jazz Jackrabbit 2 Language Data (Epic MegaGames, Inc.) |
| J2T |
Jazz Jackrabbit 2 Tile Set (Epic MegaGames, Inc.) |
| J2V |
Jazz Jackrabbit 2 Cinematic File (Epic MegaGames, Inc.) |
| J62 |
Ricoh Digital Camera File |
| J6I |
Ricoh Digital Camera File (Ricoh Co., Ltd.) |
| J92 |
Javelin Configuration File (Minisoft Inc.) |
| JA |
Trainz Railroad Simulator Game Content (Auran Games) |
| JA |
IBM Tools Updater File |
| JACKET |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JACKSUM |
Jacksum Fingerprint (Dipl.-Inf. (FH) Johann N. Löfflmann) |
| JAD |
Java Application Descriptor File (Sun Microsystems, Inc.) |
| JAG |
Jaguar Server File |
| JAIL |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JAM |
Joaquim-Andrew-Mats Message Base Proposal |
| JAM |
E-mail |
| JAM |
FTN Software Jam Messagebase |
| JAM |
JamTracker Music Module |
| JAM |
Image Microprose |
| JAM |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JAM2 |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JAMMIX |
Jammix Enhacer Music Transform File (Danilics Tibor) |
| JAN93 |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JAP |
JAlbum Project File (Datadosen) |
| JAP |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JAP |
Fifa World Cup Game Data fe Art Legalscr File |
| JAPAN |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JAR |
JARCS Compressed Archive (JPMdL Archival System) |
| JAR |
JAR Archive (ARJ Software, Inc.) |
| JAR |
Java Archive (Sun Microsystems, Inc.) |
| JAR |
Java Applet (Sun) |
| JARRE |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JAS |
Paint Shop Pro Compressed Graphic (Corel Corporation) |
| JASC |
JAS Compressed Graphic |
| JAU |
Jauge |
| JAV |
Java Source Code (Sun) |
| JAVA |
Java Source Code (Sun) |
| JAW |
IchiTaro Web Japanese Extended WordProcessor (Justsystem Corporation) |
| JB2 |
JBIG2 Bitmap Graphic |
| JBA |
Jabaco Source Code Programming Language (Jabaco) |
| JBB |
JobEditor32 Binary Job Data (Motoman Inc.) |
| JBC |
BestCrypt Container (Jetico, Inc.) |
| JBC |
Jam Byte-Codec File |
| JBD |
SigmaScan Data File |
| JBF |
Paint Shop Pro Browser Cache (Corel Corporation) |
| JBF |
Backup Now Backed Up File (JetSoft Corporation) |
| JBG |
JBIG File |
| JBI |
JobEditor32 ASCII Job Data (Motoman Inc.) |
| JBIG |
JBIG File |
| JBIG2 |
JBIG2 Bitmap Graphic |
| JBK |
Jot + Notes Backup File for Older Version (King Stairs Software) |
| JBK |
Juno Backup File |
| JBL |
Doom Scene Add-in (Id Software, Inc.) |
| JBP |
DJ Jukebox Project |
| JBR |
Paint Shop Pro Brush (Corel Corporation) |
| JBS |
DesignArt Vector Graphic (Océ N.V.) |
| JBX |
Project Scheduler File |
| JC |
FlashGet Intermediate Download (Beijing Zhitongwuxian Tech, Ltd.) |
| JC |
Watcom Source File |
| JC! |
FlashGet Incomplete Download (Beijing Zhitongwuxian Tech, Ltd.) |
| JCAMP |
Misc |
| JCB |
CB-JCBrooke Song/Module |
| JCC |
Japan Crossword Dmitry Torshin Format File (EliteWare) |
| JCC |
Code Crusader Project Data (New Planet Software) |
| JCD |
FlashGet Download Database File (Beijing Zhitongwuxian Tech, Ltd.) |
| JCE |
JWPce (Glenn Rosenthal) |
| JCF |
JAWS for Windows Configuration File (Freedom Scientific) |
| JCK |
Liquid Motion JACK Scene Description |
| JCL |
Job Control Language IBM |
| JCM |
Java Commerce Message Commerce Message (Wallet) (Sun) |
| JCP |
Jesusonic Preset (Cockos Incorporated) |
| JCS |
Flashget Script HTML Table |
| JCS |
Latest Bruker WinSpecEdit v3.08 JCAMP |
| JCV |
Baseball/Golf Analyzer (JC Video Systems) |
| JD |
Jigsaw Terminal File |
| JDA |
Winphone Fax Send Journal |
| JDB |
Norton AntiVirus Update File (Symantec Corporation) |
| JDB |
Siren Jukebox |
| JDB |
Winphone Fax Receive Journal |
| JDBG |
Project JEDI Embedded JCL Debug Information (Project JEDI) |
| JDE |
Cariverona |
| JDF |
JAWS for Windows Voice Synth File (Freedom Scientific) |
| JDF |
Turok 2 Game File |
| JDF |
Job Definition Format Job File |
| JDT |
Capture Classic Filler (Accelio) |
| JDX |
JSpell UNICODE Dictionary (Page Scholar Inc.) |
| JDX |
J Database Exchange (JDX) O/R Mapping Specification (Software Tree, Inc.) |
| JDX |
EDICT Index |
| JDX |
JCAMP Chemical Spectroscopic Data Exchange Format (MDL Information Systems, Inc.) |
| JED |
Xilinx Integrated Software Environment Device Configuration Information (Xilinx, Inc.) |
| JED |
JEDEC Programming Specification |
| JEF |
Janome NH10000 Sewing Machine Stitch File (Janome America, Inc.) |
| JEQ |
Jet Audio Saved Equalizer Setting (JetAudio, Inc.) |
| JESD |
JZEasyText Word Processor Save File (JamesZhu Inc.) |
| JET |
Jetpack User-created Level Map |
| JET |
Hybrid JetFax Fax |
| JFD |
FormWare Job |
| JFD |
JAWS for Windows (Freedom Scientific) |
| JFF |
JPEG Image |
| JFF |
JAWS for Windows (Freedom Scientific) |
| JFG |
jEEPers User Specific Information |
| JFI |
JPEG/JIFF Image |
| JFIF |
JPEG/JIFF Image |
| JFM |
Capture Classic (Accelio) |
| JFX |
J2 Fax File |
| JG6 |
BigJig Jigsaw (Lena Pankratova) |
| JGCSCS |
EditPad Pro Custom Coloring Scheme (JGsoft - Just Great Software) |
| JGD |
Paint Shop Pro Gradient (Corel Corporation) |
| JGF |
Jetcam Geometry File (JETCAM International, Ltd.) |
| JGF |
JAWS for Windows Configuration File (Freedom Scientific) |
| JGL |
QWS3270 PLUS Session Layout File (Jolly Giant Software Inc.) |
| JGP |
QWS3270 PLUS Session Parameter File (Jolly Giant Software Inc.) |
| JGS |
QWS3270 PLUS Script (Jolly Giant Software Inc.) |
| JGW |
Map File |
| JHTM |
Dynamo Server Page |
| JHTML |
Dynamo Server Page |
| JIF |
Jeff's Image Format Bitmap |
| JIF |
JPEG/JIFF Image |
| JIG |
Jigsaw Game (GameHouse, Inc., a division of RealNetworks, Inc.) |
| JIG |
Living Scenes Jigsaw Puzzles (Carolina Road Software L.L.C.) |
| JIGDO |
Jigsaw Download Download Instruction File (Richard Atterer) |
| JIGSAW |
JIGSAW Explorer JIGSAW puzzle (Carolina Road Software) |
| JIM |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JINKS |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JIS |
Japanese Industrial Standard Text File |
| JJ |
C64 Doodle Compressed File |
| JJ |
JavaCC File |
| JJC |
Canvas Compressed Audio File |
| JJF |
Jester Jugglor File |
| JKL |
Jedi Knight |
| JKM |
JAWS for Windows Configuration File (Freedom Scientific) |
| JKS |
Jedi Knight Backup |
| JKS |
keytool Java Keystore (Sun Microsystems, Inc.) |
| JL |
Sawfish Lisp-based Script |
| JLA |
VisualPro BMP Image |
| JLAB |
JLab Program Source Code (Linova) |
| JLC |
Sawfish Byte Compiled Lisp-based Script |
| JLF |
JetLinks Bookmark Managment |
| JLP |
JLIP Video Capture (Video Producer) Index Format Display (JVC) |
| JLS |
JAWS for Windows (Freedom Scientific) |
| JLS |
JPEG-LS File |
| JMA |
Super Nintendo NSRT Compressed Game (Nintendo) |
| JMAN |
Illum Source Irohaserver File |
| JMD |
Paint Shop Pro Image Map Settings (Corel Corporation) |
| JMF |
Java Multimedia File (Sun) |
| JMG |
16 Bit Adaptive RLE Compressed Bitmap |
| JMH |
JPEG File Interchange Format |
| JMK |
Code Crusader Build Script (New Planet Software) |
| JMM |
Digital Camera Video Clip (JVC) |
| JMP |
SAS JMP Discovery Chart-to-Statistics File (SAS Institute Inc.) |
| JMS |
SpamProx Blocking List (Dewqs' Tribes) |
| JMS |
Voxtron TeleButler Graphical Voice Response Call Flow |
| JMS |
UltraForce Music Format |
| JMX |
JMeter File |
| JN1 |
Epic MegaGames Jill of the Jungle Data File |
| JNB |
SigmaPlot Workbook File (SYSTAT Software Inc.) |
| JNC |
Communication Log File |
| JNG |
JPEG Network Graphic Bitmap |
| JNGL |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JNK |
Junk |
| JNL |
Journal Macro Data File (Chosen Software) |
| JNL |
Ingres Journal File (Computer Associates International, Inc.) |
| JNL |
ISC BIND Journal File (Internet Systems Consortium) |
| JNL |
WINDEV Log File (PC SOFT) |
| JNLP |
Java Web Start (Sun Microsystems, Inc.) |
| JNT |
Windows XP Tablet PC Edition Journal (Microsoft Corporation) |
| JOB |
Windows Task Scheduler Task Object (Microsoft Corporation) |
| JOB |
Survey Pro Job (Tripod Data Systems) |
| JOB |
Systems Management Server (SMS) Job File (Microsoft Corporation) |
| JOB |
QuestVision Vector Graphics File |
| JOB |
MicroSim PCBoard External ASCII Job File |
| JOB |
Job File |
| JOB |
File Invesigator Script Commands |
| JOB |
MetaCAM Nest Job (Metamation, Inc.) |
| JOB |
BETA 44 Job File |
| JOB |
AI Research |
| JOBOPTIONS |
Acrobat Job Options File (Adobe Systems Incorporated) |
| JOBS |
VirtualDub Job Control File (Avery Lee) |
| JOC |
Context4 DOS Word Processor File |
| JOCL |
Java Object Configuration Language |
| JOD |
MS.Jet.OLEDB.4.0 Related File |
| JOI |
Xboard Join Conferences File |
| JOINED |
HJSplit Default Joined File (Freebyte.com) |
| JOKE |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JONES |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JOR |
SQL Server Journal File (Microsoft Corporation) |
| JOR |
Gupta SQLWindows Journal |
| JOT |
JDesignerPro File |
| JOT |
Jot + Notes Note Data File (King Stairs Software) |
| JOT |
WinJottr Desktop Note |
| JOU |
VAX Edt Editor Journal File |
| JOURNAL |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JOY |
Trackjoy GUS Tracker Module |
| JOY |
Joystick Calibration File |
| JP2 |
Jeoparty II Presentation (Matthew Hagaman) |
| JP2 |
JPEG-2000 JP2 File |
| JP3 |
Electric Quilt File |
| JP4 |
Electric Quilt File |
| JP5 |
Electric Quilt File |
| JPA |
JoomlaPack Joomla Installation Backup (fronzenFX) |
| JPC |
Japan Picture Format |
| JPC |
JPEG-2000 Code Stream Bitmap |
| JPC |
Jprobe Coverage Memory Snapshot (Quest Software Inc.) |
| JPE |
JPEG/JIFF Image |
| JPEG |
JPEG/JIFF Image |
| JPEGENX |
egis Encrypted JPEG File (HiTRUST Inc.) |
| JPF |
Biz Plan Pro Business Plan Contents (JIAN Tools For Sales, Inc.) |
| JPF |
Mass Center Main Mass Spectrometry Data (JEOL USA, Inc.) |
| JPG |
CompactDRAW e-JPG Graphic (MediaChance) |
| JPG |
JPEG/JIFF Image |
| JPGENX |
egis Encrypted JPG File (HiTRUST Inc.) |
| JPG_T |
JPG Image File |
| JPH |
Jprobe Memory Debugger Memory Snapshot (Quest Software Inc.) |
| JPI |
Jupiter Document (Elfin Sp. z o.o.) |
| JPL |
Jprobe Settings File (Quest Software Inc.) |
| JPL |
Siren Jukebox |
| JPM |
LuraDocument.jpm Compressed PDF File (Algo Vision LuraTech GmbH) |
| JPN |
Photomodeler Lite File |
| JPOW |
JPowered Java Bar Charts |
| JPP |
Jprobe Profiler Memory Snapshot (Quest Software Inc.) |
| JPP |
Jigsaw Puzzle Player Puzzle Definition (B&P Games B.V.) |
| JPR |
Oracle JDeveloper Model JProject |
| JPR |
Javasockets File |
| JPS |
Stereo Image |
| JPS |
Jigsaw Puzzle Player Puzzle Completion Status (B&P Games B.V.) |
| JPS |
Print Studio Graphic (Jolly, Inc.) |
| JPT |
Jprobe Threadalyzer Memory Snapshot (Quest Software Inc.) |
| JPT |
Print Studio Template (Jolly, Inc.) |
| JPX |
JBuilder Project File (Borland Software Corporation) |
| JPX |
JPEG-2000 JP2 File |
| JPX |
JAlbum jalbum image info |
| JQX |
Windows Help Related File (Microsoft Corporation) |
| JQZ |
JQuiz Quiz File |
| JR |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JR2 |
FishSim Add-on (J.C.Spooner) |
| JRC |
Jrchive Compressed Archive |
| JRF |
The Jumbot Bot Level Navigation File |
| JRF |
winIDEA Workspace (Programming Project File) (iSYSTEM AG) |
| JRL |
BioWare Aurora Engine Journal (BioWare Corp.) |
| JRL |
Top Secret Crypto Gold Top Secret Journal File (TAN$TAAFL Software Company) |
| JRP |
Pg4uw Job Report File (Elnec s.r.o.) |
| JRP |
Electric Quilt File |
| JRXML |
JasperReports JRXML Report Definition (JasperSoft Corporation) |
| JS |
JetScript Output File |
| JS |
JACOsub Script |
| JS |
Mozilla (Netscape) Settings (Mozilla.org) |
| JS |
JavaScript Source Code |
| JSB |
JAWS for Windows Script Binary File (Freedom Scientific) |
| JSB |
JavaScript Bean (JSB) File |
| JSCRIPT |
GoLive JavaScript (Adobe Systems Incorporated) |
| JSD |
JAWS for Windows Script Documentation File (Freedom Scientific) |
| JSD |
Paint Shop Pro Image Slice Settings (Corel Corporation) |
| JSD |
eFAX Jet Suite Document (j2 Global Communications, Inc.) |
| JSD |
Join-Split File |
| JSDB |
JumpStart Database (Jumpstart-it.com) |
| JSE |
JScript Encoded Script File |
| JSE |
Fichier Encoded Javascript |
| JSF |
Macromedia Fireworks Batch Script |
| JSF |
Jahshaka Scene File (The Jahshaka Project) |
| JSFL |
Flash Javascript (Adobe Systems Incorporated) |
| JSH |
JAWS for Windows Script Header File (Freedom Scientific) |
| JSL |
Paint Shop Pro Shapes File (Corel Corporation) |
| JSL |
Visual J# Code (Microsoft Corporation) |
| JSM |
JAWS for Windows Script Message File (Freedom Scientific) |
| JSM |
Jig ShapeMap (Steamboat Software) |
| JSM |
JugWin Jigsaw |
| JSM |
Gray Design Associates Jigsaws Galore Jigsaw File |
| JSML |
JSim Markup Language File (University of Washington) |
| JSN |
Shield Now Shield File (JetSoft Corporation) |
| JSO |
Various Programs JISO Compressed Disk Image File |
| JSON |
Google Gears Manifest File (Google) |
| JSON |
Firefox Bookmark Backup (Mozilla) |
| JSON |
JavaScript Object Notation |
| JSP |
Java Server Page (Sun) |
| JSP10 |
Java Server Page (Sun) |
| JSPA |
WebWork Framework JSP Action |
| JSPF |
JSP Page Fragment (Sun) |
| JSRC |
Jabaco Source Code Programming Language (Jabaco) |
| JSS |
JAWS for Windows Script Source File (Freedom Scientific) |
| JSS |
JugWin Jigsaw |
| JSS |
JSheet |
| JSS |
Gray Design Associates Jigsaws Galore Saved Game Jigsaw File |
| JST |
Code Crusader Symbol Database (New Planet Software) |
| JST |
Jnes Saved Game State File (JaboSoft) |
| JSV |
Java Structure Viewer |
| JSV |
VXML JavaServer Page |
| JSV |
Japanese Flash Card File |
| JSV |
HyperRail 3D Coaster Design Construction File |
| JSW |
WML JavaServer Page |
| JSX |
After Effects Script File (Adobe Systems Incorporated) |
| JT |
JT Fax |
| JTD |
Ichitaro Document (Justsystem Corporation) |
| JTF |
Hayes JT Fax |
| JTF |
JPEG Tagged Interchange Format Image |
| JTIF |
JPEG Tagged Interchange Format Image |
| JTK |
Java ToolKit File (Sun) |
| JTL |
JTool Data File (Behavioral Health Quality) |
| JTP |
Windows XP Tablet PC Edition Journal (Microsoft Corporation) |
| JTP |
JetForm File |
| JTR |
Jelbert GeoTagger Location Database (Jelbert Consulting) |
| JUDI |
JudoScript Source Code File (JudoScript.COM) |
| JUDO |
JudoScript Source Code File (JudoScript.COM) |
| JUL |
Inteliweb Program Registration and Validation (InVision Marketing, Inc. & Inteliweb.net) |
| JUL |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JUMP |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JUMP1 |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JUN14 |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JUP |
Code Crusader User-Specific Project Preferences (New Planet Software) |
| JURL |
JustUrls Button File (Eastern Digital Pty. Ltd.) |
| JUST |
Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| JUT |
Jutvision Scene |
| JVC |
Digital Camera File |
| JVS |
Jpeg Video Sequencer Sequenced JPEG Images |
| JVSG |
IP Video System Design Tool IP Video System Design Tool (CCTV Design Software) |
| JW |
MS Wordpad, Works for windows v3.0 & 4.0 |
| JW |
Jigsaw Terminal File |
| JW |
Justwrite Text |
| JW |
Legacy Version 1.1 |
| JW |
Q & A Write for Windows 3.0 |
| JWC |
JewelCase Maker Saved File (NewTech Infosystems Inc.) |
| JWC |
Jw_cad Data (Jiro Shimizu & Yoshifumi Tanaka) |
| JWL |
Easy CD Creator's CD Label (Sonic Solutions) |
| JWL |
Justwrite Text File Library |
| JWL |
Jewel Case Creator CD Disc Case |
| JWP |
JWP Document |
| JWP |
Easy CD Creator Label File (Sonic Solutions) |
| JWR |
LegaSuite GUI J Walk Runtime File (Seagull Software Systems, Inc.) |
| JWS |
WebLogic Workshop Java Web Services (BEA Systems, Inc.) |
| JXDM |
Multi-Channel Server (MCS) Markup Editor Java Server Page with XDIME Markup/Java Code (Volantis Systems Ltd.) |
| JXT |
Daqarta Extended Audio Data (Interstellar Research) |
| JXX |
C++ Header File |
| JZ |
JamesZhu Internet Browser Database File (JamesZhu, Inc.) |
| JZZ |
Jazz Spreadsheet |
If you need to see another list, please select here...
