| # |
File extension |
Developer |
| 0 |
.J - Java Source Code |
Oracle |
| 1 |
.J2B - Jazz Jackrabbit 2 Music |
Epic Games, Inc. |
| 2 |
.J2C - JPEG2000 Image Format |
Joint Photographic Experts Group |
| 3 |
.J2D - Jazz Jackrabbit Data |
Epic Games, Inc. |
| 4 |
.J2E - Jazz Jackrabbit 2 Episode |
Epic Games, Inc. |
| 5 |
.J2I - Jazz Jackrabbit 2 Internet Server Link Format |
Epic Games |
| 6 |
.J2K - JPEG2000 Code Stream Image |
Joint Photographic Experts Group |
| 7 |
.J2L - Jazz Jackrabbit 2 Level Format |
Epic Games |
| 8 |
.J2SI - Jazz Jackrabbit 2 Internet Server Link |
Epic Games, Inc. |
| 9 |
.J2W - ArcExplorer World |
Esri |
| 10 |
.J3O - JMonkeyEngine 3D Scene |
jMonkeyEngine |
| 11 |
.J6I - Ricoh Digital Camera Image |
N/A |
| 12 |
.JA - Jet Archive |
N3V Games |
| 13 |
.JAC - JaStaCry Encrypted Format |
Kai Kretschmann |
| 14 |
.JACL - IBM WebSphere Server Script |
IBM |
| 15 |
.JAD - Java Application Descriptor Format |
Oracle |
| 16 |
.JADE - Jade Programming Language Source Code |
N/A |
| 17 |
.JAG - Jagex Data Format |
Jagex |
| 18 |
.JAI - Jaikoz Settings |
JThink Ltd |
| 19 |
.JAM - Leisure Suit Larry Magna Cum Laude Archive Format |
Sierra Entertainment |
| 20 |
.JAN - Janome Digitizer Embroidery Object |
Janome Sewing Machine Co., Ltd. |
| 21 |
.JAP - Japanese Nintendo 64 Game ROM |
N/A |
| 22 |
.JAR - Compressed Archive Format Package For Java Classes And Data Format |
Oracle |
| 23 |
.JAR.PACK - Oracle Pack200 Packed JAR Format |
Oracle |
| 24 |
.JARDESC - Eclipse JAR Settings |
The Eclipse Foundation |
| 25 |
.JARVIS - Jarvis Subscriber Format |
Jarvis Acting Company |
| 26 |
.JAS - Corel PaintShop Photo Pro Bitmap Graphics Format |
Corel Corporation |
| 27 |
.JASPER - JasperReports Data Format |
Jaspersoft |
| 28 |
.JAV - Java Language Source Code Format |
Oracle |
| 29 |
.JAVA - Java Language Source Code Format |
Oracle |
| 30 |
.JAVAJET - Eclipse JET Java Template |
The Eclipse Foundation |
| 31 |
.JAX - Java Executable JAR |
Oracle Corporation |
| 32 |
.JB2 - JBIG2 Image Format |
Joint Bi-level Image Group |
| 33 |
.JBC - Jam STAPL Byte-Code Format |
Altera |
| 34 |
.JBF - Corel PaintShop Photo Pro Image Browser Format |
Corel |
| 35 |
.JBG - Image JBIG 1-bit Raster |
N/A |
| 36 |
.JBI - Motoman Robot Job Format |
Motoman |
| 37 |
.JBIG - JBIG Raster Image Graphics |
Joint Bi-level Image Group |
| 38 |
.JBIG2 - JBIG2 |
Joint Bi-level Image Group |
| 39 |
.JBK - Juno Backup Format |
Juno |
| 40 |
.JBL - Doom Scene Add-on |
id Software LLC |
| 41 |
.JBMP - JAmes OS Bitmap Image |
JAmes OS |
| 42 |
.JBR - Corel PaintShop Photo Pro Brushes Format |
Corel |
| 43 |
.JBT - JAWS |
Freedom Scientific, Inc. |
| 44 |
.JC - FlashGet Partial Download Format |
FlashGet |
| 45 |
.JC! - FlashGet Incomplete Download Format |
FlashGet |
| 46 |
.JCC - Code Crusader Project Data |
New Planet Software |
| 47 |
.JCCFG3 - FlashGet Incomplete Download |
Trend Media Corporation Limited |
| 48 |
.JCD - FlashGet Saved |
Trend Media Corporation Limited |
| 49 |
.JCF - JAWS Configuration |
Freedom Scientific, Inc. |
| 50 |
.JCLIC - JClic Project Format |
JClic |
| 51 |
.JCM - Java Commerce Message |
Oracle Corporation |
| 52 |
.JCP - Jesusonic Preset Format |
Cockos Incorporated |
| 53 |
.JCRYPT - JCRYPT Encrypted Format |
JMasters |
| 54 |
.JCS - Java Control Source |
Oracle Corporation |
| 55 |
.JCSK - JetCast Skin |
JetAudio Inc. |
| 56 |
.JCT - JCT |
SourceForge.net |
| 57 |
.JCZ - Microsoft Liquid Motion Animation Format |
Microsoft |
| 58 |
.JDB - Norton Antivirus Definiton Update File Format |
Symantec |
| 59 |
.JDC - JDownloader Links Format |
The JDownloader Team |
| 60 |
.JDF - Adobe Acrobat Job Definition Format |
Adobe Systems |
| 61 |
.JDP - BlackBerry JDE |
BlackBerry (Research In Motion Limited) |
| 62 |
.JDW - BlackBerry JDE |
BlackBerry (Research In Motion Limited) |
| 63 |
.JDX - JSpell Dictionary |
Page Scholar Inc. |
| 64 |
.JEB - PENSIM Output |
N/A |
| 65 |
.JED - Xilinx Integrated Software Environment Device Configuration Information Format |
Xilinx |
| 66 |
.JEF - Janome Embroidery Layout Format |
Janome |
| 67 |
.JETINC - Eclipse IDE Template Fragment |
The Eclipse Foundation |
| 68 |
.JEWELQUESTSAVEDGAME - Jewel Quest Saved Game |
iWin, Inc. |
| 69 |
.JFD - JAWS Synopsis |
Freedom Scientific, Inc. |
| 70 |
.JFF - JAWS Ini |
Freedom Scientific, Inc. |
| 71 |
.JFFS2 - Journalling Flash File System 2 Disk Image |
Various Linux developers |
| 72 |
.JFI - JPEG File Interchange Format |
Joint Photographic Experts Group |
| 73 |
.JFIF - JPEG Interchange Format |
N/A |
| 74 |
.JFL - SigmaPlot |
Systat Software Inc. |
| 75 |
.JFR - WJVN Fragment |
Renato Nobili |
| 76 |
.JFS - Linux/Unix Journaling System |
N/A |
| 77 |
.JFX - J2 Fax |
N/A |
| 78 |
.JG4 - BigJig Jigsaw Puzzle Format |
Lena Games |
| 79 |
.JGCSCS - EditPad Syntax Scheme |
Just Great Software |
| 80 |
.JGD - Corel PaintShop Photo Pro Gradients |
Corel Corporation |
| 81 |
.JGF - JAWS Ini |
Freedom Scientific, Inc. |
| 82 |
.JGP - QWS3270 PLUS Session Parameter |
Jolly Giant Software Inc. |
| 83 |
.JGS - QWS3270 PLUS Script |
Jolly Giant Software Inc. |
| 84 |
.JGW - JPEG World Format |
ESRI |
| 85 |
.JGZ - Gzipped JavaScript Format |
N/A |
| 86 |
.JHM - Java Help Mapping |
Oracle Corporation |
| 87 |
.JHTML - ATG Dynamo Server Page (Java HTML) |
N/A |
| 88 |
.JIA - Digital Photo Navigator Album |
JVC |
| 89 |
.JIC - Java Icon Format |
N/A |
| 90 |
.JIF - JPEG Interchange Format |
N/A |
| 91 |
.JIFF - JPG Bitmap Image |
N/A |
| 92 |
.JIG - GameHouse Puzzle Jigsaw Game |
GameHouse, Inc. |
| 93 |
.JIGSAW - Jigsaw Explorer Puzzle Format |
Carolina Road Software |
| 94 |
.JIGZ - Jiggsaw Puzzle |
Bitz & Pixelz BV |
| 95 |
.JIS - Japanese Industry Standard Text Format |
N/A |
| 96 |
.JISP - Tkabber Emoticon Set |
N/A |
| 97 |
.JIT - Aika Online Texture |
Gala-Net Inc. |
| 98 |
.JJ - Doodle C64 Compressed Image Format |
N/A |
| 99 |
.JJF - Flash Jester Jugglor |
Flash Jester |
| 100 |
.JJJS - Claris Organizer Format |
Apple, Inc. |
| 101 |
.JKB - Quake 3 Arena Bot AI |
id Software LLC |
| 102 |
.JKL - Jedi Knight |
LucasArts Entertainment Company, LLC |
| 103 |
.JKM - JAWS Ini Configuration Format |
Freedom Scientific |
| 104 |
.JKS - Jedi Knight Save |
LucasArts Entertainment Company, LLC |
| 105 |
.JL - Julia Source Code Format |
Julia |
| 106 |
.JLB - PAC Mate BX Keyboard Driver |
N/A |
| 107 |
.JLC - Byte Compiled Lisp-based Script |
N/A |
| 108 |
.JLS - JAWS |
Freedom Scientific, Inc. |
| 109 |
.JMA - NSRT Compressed Game |
N/A |
| 110 |
.JMD - Corel PaintShop Pro Image Map Settings |
Corel Corporation |
| 111 |
.JMF - Java Media Framework |
Oracle Corporation |
| 112 |
.JML - Java Modeling Language Specification |
N/A |
| 113 |
.JMP - SAS JMP Discovery Chart-to-statistics |
SAS Institute |
| 114 |
.JMS - Voxtron TeleButler Interactive Voice Response Call Flow |
Voxtron N.V. |
| 115 |
.JMV - Jnes Record Format |
Jabsoft |
| 116 |
.JMX - Apache JMeter |
Apache Software Foundation |
| 117 |
.JNB - SigmaPlot Workbook |
Systat Software Inc. |
| 118 |
.JNG - JPEG Network Graphic Format |
N/A |
| 119 |
.JNILIB - Mac OS X Java JNI Library Format |
Oracle |
| 120 |
.JNL - Ingres Journal |
Actian Corporation |
| 121 |
.JNLP - Java Network Launching Protocol Format |
Oracle |
| 122 |
.JNT - Microsoft Windows Journal Note Format |
Microsoft |
| 123 |
.JNX - Garmin Raster Map |
N/A |
| 124 |
.JO - Jo Audio Format |
Abadie-jo |
| 125 |
.JO-7Z - Jo Audio Format |
Abadie-jo |
| 126 |
.JOB - Microsoft Windows Task Scheduler Task Object Format |
Microsoft |
| 127 |
.JOBOPTIONS - Adobe Acrobat Job Options Format |
Adobe Systems |
| 128 |
.JOBS - VirtualDub Job |
Avery Lee |
| 129 |
.JOD - Microsoft Jet OLEDB.4.0 |
Microsoft Corporation |
| 130 |
.JOE - .joe Editor Document Format |
Cyril Hicks |
| 131 |
.JOINED - HJSplit Data Format |
Freebyte |
| 132 |
.JOML - JOOB Object Modelling Language |
Microsoft Corporation |
| 133 |
.JOMPROJ - Microsoft Visual Studio JOOB Object Model Project |
Microsoft Corporation |
| 134 |
.JOR - Microsoft SQL Server Journal |
Microsoft Corporation |
| 135 |
.JOT - Jot+ Notes Note Data |
King Stairs Software |
| 136 |
.JOURNAL.DOC - SolidWorks Design Journal Template |
SolidWorks Corporation |
| 137 |
.JOURNAL_INFO_BLOCK - Apple Mac OS Xsystem |
Apple, Inc. |
| 138 |
.JOY - CryENGINE Facial Editor Joystick Settings Format |
Crytek |
| 139 |
.JP1 - Japanese (Romaji) Text Format |
N/A |
| 140 |
.JP2 - JPEG 2000 Image Format (ISO 15444-1) Format |
Joint Photographic Experts Group |
| 141 |
.JP3 - Electric Quilt |
Electric Quilt |
| 142 |
.JP4 - Electric Quilt |
Electric Quilt |
| 143 |
.JP5 - Electric Quilt |
Electric Quilt |
| 144 |
.JPA - Joomla Installation Backup |
N/A |
| 145 |
.JPAGE - Eclipse Java Scrapbook Page |
The Eclipse Foundation |
| 146 |
.JPB - Publish Manager Report |
JSoftware |
| 147 |
.JPC - JPEG2000 Code Stream Image Format |
Joint Photographic Experts Group |
| 148 |
.JPD - Joint PhotoDefiner Image Format |
N/A |
| 149 |
.JPE - JPEG Bitmap Image Format |
Joint Photographic Experts Group |
| 150 |
.JPEG - JPEG Bitmap Image Format |
Joint Photographic Experts Group |
| 151 |
.JPEGENX - Egis Encrypted JPEG |
Egis Technology Inc. |
| 152 |
.JPEG_160X120 - 160 X 120 Pixels JPEG Image |
N/A |
| 153 |
.JPEG_170X220 - 170 X 220 Pixels JPEG Image |
N/A |
| 154 |
.JPF - JPEG 2000 Extended Image Format (ISO 15444-2) Format |
Joint Photographic Experts Group |
| 155 |
.JPG - JPEG Bitmap Image Format |
Joint Photographic Experts Group |
| 156 |
.JPG2 - JPEG 2000 Image Format (ISO 15444-1) Format |
Joint Photographic Experts Group |
| 157 |
.JPGENX - Egis Encrypted JPG |
Egis Technology Inc. |
| 158 |
.JPGW - JPEG World Format |
ESRI |
| 159 |
.JPGX - Egis Encrypted JPG Bitmap Image |
Egis Technology Inc. |
| 160 |
.JPG_108X192 - Android Picture |
N/A |
| 161 |
.JPG_128X128 - Android Picture |
N/A |
| 162 |
.JPG_128X160 - Android Picture |
N/A |
| 163 |
.JPG_128X96 - Android Picture |
N/A |
| 164 |
.JPG_160X120 - Android Picture |
N/A |
| 165 |
.JPG_160X128 - Android Picture |
N/A |
| 166 |
.JPG_170X128 - Android Picture |
N/A |
| 167 |
.JPG_170X220 - Android Picture |
N/A |
| 168 |
.JPG_220X176 - Android Picture |
N/A |
| 169 |
.JPG_240X320 - Android Picture |
Google Inc. |
| 170 |
.JPG_320X240 - Android Picture |
N/A |
| 171 |
.JPG_320X320 - Android Picture |
N/A |
| 172 |
.JPG_480X320 - Android Picture |
N/A |
| 173 |
.JPG_512X512 - Android Picture |
Google Inc. |
| 174 |
.JPG_56X42 - Android Picture |
N/A |
| 175 |
.JPG_T - JPEG Image |
N/A |
| 176 |
.JPH - JProbe Memory Snapshot Format |
Quest |
| 177 |
.JPI - Jupiter Encrypted XML |
Elfin Sp. z o.o. |
| 178 |
.JPL - JProbe Settings |
Quest Software, Inc. |
| 179 |
.JPM - JPEG 2000 Multi-layer Image Format (ISO 15444-6) |
N/A |
| 180 |
.JPN - Windows Japanese Noise-Word List Format |
Microsoft |
| 181 |
.JPP - Jigsaw Puzzle Player Puzzle Definition |
N/A |
| 182 |
.JPR - Oracle JDeveloper Model Project |
Embarcadero Technologies |
| 183 |
.JPS - Stereospic JPEG Format |
N/A |
| 184 |
.JPT - Jprobe Threadalyzer Memory Snapshot |
Quest Software, Inc. |
| 185 |
.JPW - ESRI JPEG World Format |
ESRI |
| 186 |
.JPX - JPEG 2000 Extended Image Format (ISO 15444-2) Format |
Joint Photographic Experts Group |
| 187 |
.JPZ - Puzzle Solver Puzzle |
N/A |
| 188 |
.JQ3SAVEGAME - Jewel Quest III Saved Game |
iWin, Inc. |
| 189 |
.JQX - Microsoft Windows Help Related |
Microsoft Corporation |
| 190 |
.JRC - PCjr Cartridge ROM Format |
N/A |
| 191 |
.JRF - The Jumbot Bot Level Navigation |
N/A |
| 192 |
.JRL - BioWare Aurora Game Engine Journal |
BioWare |
| 193 |
.JRPRINT - JasperReports Print Format |
Jaspersoft |
| 194 |
.JRS - Extensible Storage Engine (ESE) Reserve Transaction Log Format |
Microsoft |
| 195 |
.JRTF - JAmes OS Rich Text Format |
JAmes OS |
| 196 |
.JRXML - JasperReports Layout Format |
Jaspersoft |
| 197 |
.JRZ - Sony Playstation Portable Game Data Format |
Sony |
| 198 |
.JS - JavaScript Format |
N/A |
| 199 |
.JSA - JRun Server Application |
Adobe Systems Incorporated |
| 200 |
.JSB - JAWS Script Binary |
Freedom Scientific, Inc. |
| 201 |
.JSC - JavaScript Config |
N/A |
| 202 |
.JSD - Jazer Financial Format |
Jazer Solutions |
| 203 |
.JSDA - Jazer Financial Format |
Jazer Solutions |
| 204 |
.JSE - JScript Encoded Script Format |
Microsoft |
| 205 |
.JSF - Adobe Fireworks Batch Script |
Adobe |
| 206 |
.JSFL - Flash JavaScript Format |
Adobe Systems |
| 207 |
.JSH - JAWS Script Header Format |
Freedom Scientific |
| 208 |
.JSI - JAWS Personalized Settings |
Freedom Scientific, Inc. |
| 209 |
.JSK - JetAudio |
COWON America, Inc. |
| 210 |
.JSL - Corel PaintShop Photo Pro Shapes |
Corel Corporation |
| 211 |
.JSM - JAWS Script Message |
Freedom Scientific, Inc. |
| 212 |
.JSML - JSim Model |
The NSR Physiome Project |
| 213 |
.JSN - Shield Now Shield |
JetSoft Co. |
| 214 |
.JSO - Compressed ISO Image |
N/A |
| 215 |
.JSON - JavaScript Object Notation Format |
N/A |
| 216 |
.JSONP - JSON-with-padding Source Code |
N/A |
| 217 |
.JSP - JAVA Server Page Format |
Oracle |
| 218 |
.JSPA - Java Servlet Alias Format |
N/A |
| 219 |
.JSPF - Java JSP Fragment |
Oracle |
| 220 |
.JSPX - XML Java Server Page |
N/A |
| 221 |
.JSR - Job Safety Report Definition |
N/A |
| 222 |
.JSS - JAWS Script Source Format |
JACOsub |
| 223 |
.JST - Java Server Page |
Oracle |
| 224 |
.JSV - Java Structure Viewer |
Steffen Webe |
| 225 |
.JSX - Adobe After Effects Script Format |
Adobe Systems |
| 226 |
.JSXBIN - Binary JavaScript Format |
Adobe Systems |
| 227 |
.JSXINC - ExtendScript Included Script Format |
Adobe Systems |
| 228 |
.JT - JT Open CAD Format |
N/A |
| 229 |
.JTB - JTB JavaCC Grammar |
Oracle Corporation |
| 230 |
.JTBACKUP - Just Type Notes Backup Format |
Shubham Kedia |
| 231 |
.JTD - Ichitaro Document |
Justsystems |
| 232 |
.JTDC - Ichitaro Compressed Document |
Justsystems |
| 233 |
.JTF - JPEG Tagged Interchange Format Image |
N/A |
| 234 |
.JTG - Joint Test Action Group Configuration |
ARM Holdings plc |
| 235 |
.JTK - Sun Microsystems Java Toolkit |
Oracle Corporation |
| 236 |
.JTL - JMeter Test Results |
Apache Software Foundation |
| 237 |
.JTP - Microsoft Windows Journal Template Format |
Microsoft |
| 238 |
.JTPL - Rational Application Developer WebContent Theme Template |
IBM |
| 239 |
.JTS - JVC Cyberlink AVCHD Video Format |
Cyberlink |
| 240 |
.JTT - Ichitaro Document Template |
Justsystems |
| 241 |
.JTV - JRiver Media Center Recorded TV Format |
J. River |
| 242 |
.JTX - Jrju Text Format |
Microsoft |
| 243 |
.JUDE - JUDE Project Format |
N/A |
| 244 |
.JVS - Web Proxy Autodiscovery Protocol Format |
N/A |
| 245 |
.JVSG - Video Surveillance Project |
JVSG |
| 246 |
.JVT - JRiver Recorded Video |
JRiver, Inc. |
| 247 |
.JW - Microsoft WordPad |
N/A |
| 248 |
.JWC - JewelCase Maker Saved |
NTI Corporation |
| 249 |
.JWG - Java |
Oracle Corporation |
| 250 |
.JWL - Roxio Jewel Case Format |
Roxio |
| 251 |
.JWR - LegaSuite GUI J Walk Runtime |
Rocket Software, Inc. |
| 252 |
.JWS - Oracle WebLogic Server Java Web Services Format |
BEA Systems |
| 253 |
.JXR - JPEG XR Image |
Microsoft |
| 254 |
.JZ - JamesZhu Internet Browser Database |
JamesZhu Inc. |
