since 2000
Alphabetic File Extension List: j
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: 444.
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| Extension | Information |
| J | JAR compressed and archived file (ARJ Software) |
| J | Java source code and script file (Oracle) |
| J | XnView MP bitmap image file (Pierre-Emmanuel Gougelet) |
| J00 | HJSplit Split archive part |
| J01 | HJSplit, 7-Zip, JDownloader split archive part |
| 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 | IrfanView image (Irfan Skiljan) |
| J2K | PaintShop image (Corel) |
| J2K | Photoshop image (Adobe) |
| 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 | Chrome data (Google) |
| JA | Firefox data (Mozilla) |
| JA | Tools Updater updates (IBM) |
| JA | Trainz Railroad Simulator game data archive (Auran) |
| JACKSUM | Jacksum Fingerprint (Dipl.-Inf. (FH) Johann N. Löfflmann) |
| JAD | Java SDK application descriptor (Oracle) |
| JAG | Jaguar Server File |
| JAM | |
| JAM | FTN Software Jam Messagebase |
| JAM | Image Microprose |
| JAM | JamTracker Music Module |
| JAM | Joaquim-Andrew-Mats Message Base Proposal |
| JAMMIX | Jammix Enhacer Music Transform File (Danilics Tibor) |
| JAMS | jams.py audio annotation file |
| JAP | Fifa World Cup Game Data fe Art Legalscr File |
| JAP | JAlbum Project File (Datadosen) |
| JAR | JAR archive (ARJ) |
| JAR | JARCS compressed archive (JPMdL Archival System) |
| JAR | Java applet (Oracle) |
| JAR | Java application (Oracle) |
| JAS | Cheetah3D 3D model (Martin Wengenmayer) |
| JAS | Paint Shop Pro raster images (Corel) |
| JASC | JAS Compressed Graphic |
| JASP | JASP Saving JASP projects |
| JASPER | JasperReports instructions file (Jaspersoft) |
| JAU | Jauge |
| JAV | Java Source Code (Sun) |
| JAVA | Eclipse source code (Eclipse Foundation) |
| JAVA | JDK source code (Oracle) |
| JAVA | NetBeans source code (Oracle) |
| JAW | IchiTaro Web Japanese Extended WordProcessor (Justsystem Corporation) |
| JB2 | JBIG2 Bitmap Graphic |
| JB2E | compressed image file Compressed Images |
| 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 | Backup Now backed up data (JetSoft) |
| JBF | PaintShop thumbnail cache (Corel) |
| JBG | JBIG File |
| JBI | JobEditor32 ASCII Job Data (Motoman Inc.) |
| JBIG | JBIG File |
| JBIG2 | JBIG2 Bitmap Graphic |
| JBK | Jet database backup file (Microsoft Corporation) |
| JBK | Jot + Notes Backup File for Older Version (King Stairs Software) |
| JBK | Juno Backup File |
| JBL | Doom Scene Add-in (Id Software, Inc.) |
| JBM | Gamebryo LightSpeed, Gamebryo 3D model |
| 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.) |
| JC5 | NedGraphics Jacquard weaving design |
| JCAMP | Misc |
| JCB | CB-JCBrooke Song/Module |
| JCC | Code Crusader Project Data (New Planet Software) |
| JCC | Japan Crossword Dmitry Torshin Format File (EliteWare) |
| 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 |
| JDB3 | SQL Developer SQL Job Log |
| JDBG | Project JEDI Embedded JCL Debug Information (Project JEDI) |
| JDE | Cariverona |
| JDF | Delta Project file (JEOL) |
| JDF | JAWS Dictionary file (Freedom Scientific) |
| JDF | Turok 2 Game data file (Iguana Entertainment) |
| JDP | Eclipse software project (BlackBerry) |
| JDR | JDR Viewer Recording Data |
| JDT | Capture Classic Filler (Accelio) |
| JDX | EDICT Index |
| JDX | J Database Exchange (JDX) O/R Mapping Specification (Software Tree, Inc.) |
| JDX | JCAMP Chemical Spectroscopic Data Exchange Format (MDL Information Systems, Inc.) |
| JDX | JSpell UNICODE Dictionary (Page Scholar Inc.) |
| JED | ISE device configuration (Xilinx) |
| JED | WinCUPL device configuration (Microchip) |
| JEF | Artistic Digitizer stitch file (Janome America, Inc.) |
| JEF | Embird Studio stitch file (BALARAD) |
| JEF | SewWhat-Pro stitch file (S & S Computing) |
| JEM | Blockbench Minecraft entity model |
| JEQ | Jet Audio Saved Equalizer Setting (JetAudio, Inc.) |
| JESD | JZEasyText Word Processor Save File (JamesZhu Inc.) |
| JET | Access database (Microsoft) |
| JET | Bloons Tower Defense game data (Ninja Kiwi) |
| JET | Eclipse template (Eclipse Foundation) |
| JET | Hybrid JetFax fax document |
| JET | Jetpack level map (Jetpack HQ) |
| JET | SQLite database (SQLite Consortium) |
| JET | The Jackbox Party Pack rap battle data (Jackbox) |
| JFD | FormWare Job |
| JFD | JAWS for Windows (Freedom Scientific) |
| JFF | JAWS for Windows (Freedom Scientific) |
| JFF | JPEG Image |
| JFG | jEEPers User Specific Information |
| JFI | JPEG/JIFF Image |
| JFIF | Gmail email attachment (Google) |
| JFIF | PDFsharp document (Empira) |
| JFIF | Photos image (Microsoft) |
| JFIF | Preview image (Apple) |
| JFM | Capture Classic (Accelio) |
| JFR | Java Flight Recorder Diagnostic and Profiling data tool (Oracle) |
| JFT | Tekla Structures Tekla Structures Model |
| 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 | JAWS for Windows Configuration File (Freedom Scientific) |
| JGF | Jetcam Geometry File (JETCAM International, Ltd.) |
| 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 | ArcGIS rule definition file (ESRI) |
| JGW | AutoCAD graphics format (Autodesk Inc.) |
| JGW | Map File |
| JGZ | GZip compressed script file (Jean-loup Gailly and Mark Adler) |
| JHTM | Dynamo Server Page |
| JHTML | Dynamo Server Page |
| JIC | Quartus II configuration file (Altera) |
| JIF | Photo Studio image (ACD) |
| JIF | XnView image (XnSoft) |
| 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 | Apple II operating system Golden Orchard Apple II CD Rom file |
| 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 script (Sawfish Community) |
| JL | Visual Studio Code source code (Microsoft) |
| JLA | VisualPro BMP Image |
| JLAB | JLab Program Source Code (Linova) |
| JLC | Sawfish Byte Compiled Lisp-based Script |
| JLF | JetLinks Bookmark Managment |
| JLK | Java Keytool Java Keystore File |
| JLP | JLIP Video Capture (Video Producer) Index Format Display (JVC) |
| JLQM | Samsung Notes Samsung memos data |
| 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 discovery chart-to-statistics file (SAS Institute Inc.) |
| JMS | SpamProx Blocking List (Dewqs' Tribes) |
| JMS | UltraForce Music Format |
| JMS | Voxtron TeleButler Graphical Voice Response Call Flow |
| JMX | Hot Potatoes project (Half-Baked) |
| JMX | JMeter test (Apache) |
| 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 |
| JNK | Junk |
| JNL | Ingres Journal File (Computer Associates International, Inc.) |
| JNL | ISC BIND Journal File (Internet Systems Consortium) |
| JNL | Journal Macro Data File (Chosen Software) |
| JNL | WINDEV Log File (PC SOFT) |
| JNLP | Java web start (Oracle) |
| JNT | Windows Journal journal file (Microsoft Corporation) |
| JOB | File Investigator script (RobWare) |
| JOB | Nesting product manufacturing job (Metamation) |
| JOB | OrCAD PCB Designer PCB external job (Cadence) |
| JOB | Survey Pro job (Tripod Data Systems) |
| JOB | System Center automated job (Microsoft) |
| JOB | Task Scheduler task object (Microsoft) |
| JOB | Workload Planner automated job (ASG) |
| 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) |
| JOR | Gupta SQLWindows Journal |
| JOR | SQL Server Journal File (Microsoft Corporation) |
| JOT | JDesignerPro File |
| JOT | Jot + Notes Note Data File (King Stairs Software) |
| JOT | WinJottr Desktop Note |
| JOU | VAX Edt Editor Journal File |
| JOURNAL | Apple II operating system Golden Orchard Apple II CD Rom file |
| JOURNAL_INFO_BLOCK | Linux Kernel Filesystem Journaling |
| JOY | Joystick Calibration File |
| JOY | Trackjoy GUS Tracker Module |
| JP | IrfanView, JPEGView and most image viewers Storing Images |
| JP0 | various image viewers and editors JPEG 2000 Image |
| JP2 | Jeoparty II presentation (Matthew Hagaman) |
| JP2 | Photoshop image (Adobe) |
| JP2 | Preview image (Apple) |
| JP2 | XnView image (XnSoft) |
| JP3 | Electric Quilt File |
| JP4 | Electric Quilt File |
| JP5 | Electric Quilt File |
| JPA | eXtract Wizard backup file (Akeeba Ltd.) |
| JPA | JoomlaPack backup file (Open Source Matters, Inc.) |
| JPC | Japan Picture Format |
| JPC | JPEG-2000 Code Stream Bitmap |
| JPC | Jprobe Coverage Memory Snapshot (Quest Software Inc.) |
| JPE | Photos image (Microsoft) |
| JPE | Preview image (Apple) |
| JPE | XnView image (XnSoft) |
| JPEG | 7-Zip archive (Igor Pavlov) |
| JPEG | Photos image (Microsoft) |
| JPEG | Photoshop image (Adobe) |
| JPEG | Preview image (Apple) |
| JPEGENX | egis Encrypted JPEG File (HiTRUST Inc.) |
| JPF | BizPlanBuilder business plan contents (JIAN) |
| JPF | IrfanView image (Irfan Skiljan) |
| JPF | Photoshop image (Adobe) |
| JPF | SMILE VIEW Map mass spectrometry data (JEOL) |
| JPF | XnView image (XnSoft) |
| JPG | 7-Zip archive (Igor Pavlov) |
| JPG | CompactDRAW image (MediaChance) |
| JPG | Firefox compressed image (Mozilla) |
| JPG | GIMP image (GIMP Team) |
| JPG | Photos image (Microsoft) |
| JPG | Photoshop image (Adobe) |
| JPG | Preview image (Apple) |
| JPGENX | egis Encrypted JPG File (HiTRUST Inc.) |
| JPGLARGE | Adobe Photoshop Large JPEG preview |
| JPGTHUMB | various image viewers and operating systems JPEG thumbnail |
| JPGX | paint.net Extended Image Format |
| JPG_ | Digital Cameras, Image Editors, Web Browsers Storing images |
| JPG_128X160 | Image viewers, web browsers, mobile devices Resized JPEG image |
| JPG_128X96 | Image viewers, web browsers, image editors Resized JPEG images |
| JPG_160X120 | Image processing and viewing software Resized JPEG image |
| JPG_160X128 | Image viewers, web browsers, graphic editors Resized JPEG |
| JPG_240X320 | Image viewers, web browsers, mobile devices Resized JPEG images |
| JPG_320X240 | Image viewers, web browsers, mobile devices Resized JPEG image |
| JPG_320X320 | Web browsers, image viewers, content management systems Resized JPEG image |
| JPG_56X42 | Image processing software; Automation scripts Resized JPEG image |
| JPG_LARGE | Adobe Photoshop Large JPEG image |
| JPG_LBK | Image editing/management software JPEG backup |
| JPG_NOMEDIA | Operating System (Android) Hidden image |
| JPG_SMALL | various image processing and viewing software Small JPEG image |
| JPG_T | JPG Image File |
| JPG_THUMB | gd-jpeg v1 and v2 JPEG thumbnail |
| 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 | Jigsaw Puzzle Player Puzzle Definition (B&P Games B.V.) |
| JPP | Jprobe Profiler Memory Snapshot (Quest Software Inc.) |
| JPR | Javasockets File |
| JPR | Oracle JDeveloper Model JProject |
| JPS | Akeeba Backup website data backup (Akeeba) |
| JPS | ID Flow design (Jolly) |
| JPS | Jigsaw Puzzle Player puzzle completion status (Bits and Pixels) |
| JPS | StereoPhoto Maker stereoscopic image (Muttyan) |
| JPS | XnView stereoscopic image (XnSoft) |
| JPT | Jprobe Threadalyzer Memory Snapshot (Quest Software Inc.) |
| JPT | Print Studio Template (Jolly, Inc.) |
| JPX | jAlbum image information (jAlbum) |
| JPX | JBuilder project (Embarcadero) |
| JPX | PaintShop image (Corel) |
| JPX | Preview image (Apple) |
| JPX | XnView image (XnSoft) |
| JP_ | Web browsers, Download managers Partially downloaded image |
| JQX | Windows Help Related File (Microsoft Corporation) |
| JQZ | JQuiz Quiz File |
| JR | Apple II operating system Golden Orchard Apple II CD Rom file |
| JR2 | FishSim Add-on (J.C.Spooner) |
| JRC | Jrchive Compressed Archive |
| JREP | Juniper Networks Devices Juniper Reports 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 | Electric Quilt File |
| JRP | Pg4uw Job Report File (Elnec s.r.o.) |
| JRPRINT | JasperReports Report output |
| JRPXML | JasperReports JasperReports print file |
| JRS | Exchange Server reserve transaction log (Microsoft) |
| JRXML | JasperReports JRXML Report Definition (JasperSoft Corporation) |
| JS | Firefox settings (Mozilla) |
| JS | JetScript print job (JetScript Developer) |
| JS | Node script (OpenJS Foundation) |
| JS | Visual Studio Code script (Microsoft) |
| JSA | Java Runtime Environment Java Archive |
| JSB | JavaScript Bean (JSB) File |
| JSB | JAWS for Windows Script Binary File (Freedom Scientific) |
| JSBUNDLE | React Native JavaScript Code Bundle |
| JSC | JavaScript compiled JavaScript file (Mozilla Foundation) |
| JSCRIPT | GoLive JavaScript (Adobe Systems Incorporated) |
| JSD | eFAX JetSuite document file (j2 Global, Inc.) |
| JSD | JAWS script documentation file (Freedom Scientific) |
| JSD | Jazar information file (Jazer Solutions, LLC) |
| JSD | JetSuite Pro document file (Hewlett-Packard) |
| JSD | Paint Shop Pro image slice settings file (Corel Corporation) |
| JSDB | JumpStart Database (Jumpstart-it.com) |
| JSE | AdoPiSoft executable (AdoPiSoft) |
| JSE | Visual Studio script (Microsoft) |
| JSF | Acrobat data (Adobe) |
| JSF | Eclipse script (Eclipse Foundation) |
| JSF | Fireworks script (Adobe) |
| JSF | Jahshaka scene (The Jahshaka Project) |
| JSF | Project64 joystic settings (Project64 Developers) |
| 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 | Gray Design Associates Jigsaws Galore Jigsaw File |
| JSM | JAWS for Windows Script Message File (Freedom Scientific) |
| JSM | Jig ShapeMap (Steamboat Software) |
| JSM | JugWin Jigsaw |
| JSML | JSim Markup Language File (University of Washington) |
| JSN | Shield Now Shield File (JetSoft Corporation) |
| JSO | Various Programs JISO Compressed Disk Image File |
| JSON | Firefox bookmark backup (Mozilla) |
| JSON | Gears manifest (Google) |
| JSON | Visual Studio Code json-encoded document (Microsoft) |
| JSONC | jsonc source code file (komkom) |
| JSONL | jq Structured data interchange |
| JSONLZ4 | Firefox compressed Firefox bookmarks backup file (Mozilla) |
| JSON_ | Web browsers, text editors, specialized JSON editors, and various programming languages Data interchange |
| JSP | 7-Zip compressed data (Igor Pavlov) |
| JSP | Acrobat document (Adobe) |
| JSP | Eclipse dynamic web page (Eclipse Foundation) |
| JSP | Java dynamic web page (Oracle) |
| JSP | XnView compressed (XnSoft) |
| JSP10 | Java Server Page (Sun) |
| JSPA | WebWork Framework JSP Action |
| JSPF | JSP Page Fragment (Sun) |
| JSPX | JavaServer Pages engine XML Web Component |
| JSRC | Jabaco Source Code Programming Language (Jabaco) |
| JSS | Gray Design Associates Jigsaws Galore Saved Game Jigsaw File |
| JSS | JAWS for Windows Script Source File (Freedom Scientific) |
| JSS | JSheet |
| JSS | JugWin Jigsaw |
| JST | Code Crusader Symbol Database (New Planet Software) |
| JST | Jnes Saved Game State File (JaboSoft) |
| JSV | HyperRail 3D Coaster Design Construction File |
| JSV | Japanese Flash Card File |
| JSV | Java Structure Viewer |
| JSV | VXML JavaServer Page |
| JSW | WML JavaServer Page |
| JSX | After Effects script (Adobe) |
| JSX | ExtendScript Toolkit script (Adobe) |
| JSX | Visual Studio Code application module (Microsoft) |
| JSXBIN | Adobe InDesign compiled InDesign scripts |
| JT | CATIA 3D model or drawing (Dassault Systèmes) |
| JT | JT Fax data (Hayes) |
| JT | JT2Go 3D model or drawing (Siemens) |
| JT | Solid Edge 3D model or drawing (Siemens) |
| 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 | JetForm Design data (JetForm) |
| JTP | Journal journal (Microsoft) |
| JTR | Jelbert GeoTagger Location Database (Jelbert Consulting) |
| JTSL | JobTracker Job Application Tracking |
| JTX | Database Transaction log Database Transaction log file (Microsoft) |
| 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) |
| JUP | Code Crusader User-Specific Project Preferences (New Planet Software) |
| JUPIDU | Bystronic BySoft 7 Bending Program |
| JURL | JustUrls Button File (Eastern Digital Pty. Ltd.) |
| JUT | Jutvision Scene |
| JVC | Digital Camera File |
| JVCFNRK5 | Adobe Photoshop JPEG image |
| JVS | Jpeg Video Sequencer Sequenced JPEG Images |
| JVSG | IP Video System Design Tool IP Video System Design Tool (CCTV Design Software) |
| JW | Jigsaw Terminal File |
| JW | Justwrite Text |
| JW | Legacy Version 1.1 |
| JW | MS Wordpad, Works for windows v3.0 & 4.0 |
| 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 | Jewel Case Creator CD Disc Case |
| JWL | Justwrite Text File Library |
| JWP | Easy CD Creator Label File (Sonic Solutions) |
| JWP | JWP Document |
| JWPUB | JW Library Jehovah's Witness publications |
| JWR | LegaSuite GUI J Walk Runtime File (Seagull Software Systems, Inc.) |
| JWS | JDeveloper Page Layout (Oracle Corporation) |
| JWS | Oracle WebLogic Server Java Web Service annotated file (Oracle) |
| JWT | Web servers and applications Authentication and Authorization |
| JXDM | Multi-Channel Server (MCS) Markup Editor Java Server Page with XDIME Markup/Java Code (Volantis Systems Ltd.) |
| JXL | JPEG XL Image Codec JPEG XL image |
| JXR | IrfanView image (Irfan Skiljan) |
| JXR | Photos image (Microsoft) |
| JXR | XnView image (XnSoft) |
| JXT | Daqarta Extended Audio Data (Interstellar Research) |
| JXX | C++ Header File |
| JZ | JamesZhu Internet Browser Database File (JamesZhu, Inc.) |
| JZZ | Jazz Spreadsheet |
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