A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Num Sym
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.J Java Source Code
JAR Compressed File
.J2B Jazz Jackrabbit 2 Game Music File
.J2G J2 Fax File
.J2K JPEG-2000 JP2 File [XnView]
.J62 Ricoh Digital Camera File
.J6I Ricoh Digital Camera File
.JAG Jaguar Server File (Atari)
.JAR Java Archive File (a compressed file for applets and related files)
.JAS Compressed Graphic
.JAV Java Source Code
.JAVA Java Source Code (multiple compilers)
.JAW IchiTaro Web Japanese Extended WordProcessor (Japanese site)
.JBC Jam Byte-Code Hex File (8051 Microprocessor File)
BestCrypt File
.JBD SigmaScan Data File
.JBF Paint Shop Pro Browser File [XnView]
.JBG JBIG File [XnView]
.JBIG JBIG File [XnView]
.JBK Juno Backup File
.JBP DJ Jukebox Project
.JBR Jasc Paint Shop Pro Brush
.JBS Anagraph DesignArt (vector graphics)
.JBX Project Scheduler File
.JC! FlashGet File
.JCD FlashGet Download Database File
.JCE JWPce (Japanese Word Processor)
.JD Jigsaw Terminal File (Real-time financial data display)
.JDB Siren Jukebox
.JDE Cariverona
.JDF Turok 2 Game File
.JDT Accelio Capture Classic (JetForm) Filler (JetForm Corp became Accelio 12 Sep 2001)
.JDX EDICT Index (EDICT is Japanese/English Dictionary)
.JEF Janome NH10000 Sewing Machine File
.JET Hybrid JetFax Fax
Jetpack User-created Level Map
.JFD FormWare Job
JAWS Voice Synthesis Software
.JFF JPEG Image
.JFI JPEG/JIFF Image [XnView]
.JFIF JPEG/JIFF Image [XnView]
.JFM Accelio Capture Classic (JetForm) File (JetForm Corp became Accelio 12 Sep 2001)
.JFX J2 Fax File
.JG6 BigJig Jigsaw
.JGD Paint Shop Pro Gradient
.JHTM Dynamo Server Page (Java HTML)
.JHTML Dynamo Server Page (Java HTML)
.JIF JPEG/JIFF Image [XnView]
Jeff's Image Format [XnView]
.JIG Living Scenes Jigsaw Puzzles (Still Image Puzzle)
.JIS Japanese
.JJ JavaCC File (Java parser generator)
.JJF Jester Jugglor File (program to manipulate Flash)
.JLF JetLinks Bookmark Managment
.JLS JPEG-LS File [XnView]
.JMD Jasc Paint Shop Pro Image Map Settings
.JMM JVC Digital Camera Video Clip (JVC special format)
.JMP SAS JMPDiscovery Chart-to-statistics File
.JMS Voxtron TeleButler Graphical Voice Response Call Flow
.JMX JMeter File (Web performance testing)
.JN1 Epic MegaGames Jill of the Jungle Data File
.JNB Sigma Plot Workbook File
.JNG JPEG Network Graphic [XnView]
.JNK Junk (temporary file)
.JNL Ingres Journal File
.JNLP Java Web Start (Java Network Launching Protocol -
launch and manage applications off the Web)
.JNT Windows XP Tablet PC Edition Journal
.JOB Job File
Task Scheduler Task Object
AI Research File
QuestVision Vector Graphics File (IMG File Conversion)
MicroSim PCBoard External ASCII Job File (used for import and export)
Tripod Data Systmes Survey Pro Job (Surveyor data collection)
.JOBOPTIONS Acrobat Job Options File
.JOD MS.Jet.OLEDB.4.0 Related File
.JOR Microsoft SQL Server Journal File
.JOT WinJottr Desktop Note
JDesignerPro File
.JOU VAX Edt Editor Journal Backup
.JP2 JPEG-2000 JP2 File [XnView] [Kakadu]
.JP3 Electric Quilt File (unverified)
.JP4 Electric Quilt File (unverified)
.JP5 Electric Quilt File (unverified)
.JPC Picture File (Japanese)
JPEG-2000 Code Stream [XnView]
.JPE JPEG/JIFF Image [XnView] [IrfanView]
.JPEG JPEG/JIFF Image [XnView] [IrfanView]
.JPG JPEG/JIFF Image [XnView] [IrfanView]
.JPL Siren Jukebox
.JPOW JPowered Java Bar Charts (unverified)
.JPR Oracle JDeveloper Model JProject
.JPS Stereo Image [XnView]
.JPX JBuilder Project File
JPEG-2000 JP2 File [XnView]
.JRP Electric Quilt File (unverified)
.JS JavaScript Source Code
.JSB Henter-Joyce, Inc. Jaws Script Binary File (Screen reader program)
.JSD eFAX Jet Suite Document
Henter-Joyce, Inc. Jaws Script Documentation File (Screen reader program)
Join-Split File
.JSE JScript Encoded Script File
.JSF Macromedia Fireworks Batch Script
.JSH Henter-Joyce, Inc. Jaws Script Header File (Screen reader program)
.JSL PaintShop Pro File
.JSM Henter-Joyce, Inc. Jaws Script Message File (Screen reader program)
Gray Design Associates Jigsaws Galore Jigsaw File
.JSP Java Server Page
.JSP10 Java Server Page
.JSS Henter-Joyce, Inc. Jaws Script Source File (Screen reader program)
JSheet (Spreadsheet Application Server)
Gray Design Associates Jigsaws Galore Saved Game Jigsaw File
.JSV Java Structure Viewer
HyperRail 3D Coaster Design Construction File
Japanese Flash Card File
VXML JavaServer Page
.JSW WML JavaServer Page
.JT JT Fax
.JTD Ichitaro 11 (major Japanese word proccesser)
.JTF JPEG Tagged Interchange Format Image
Hayes JT Fax [XnView]
.JTK Sun Java ToolKit File
.JTP JetForm File
Windows XP Tablet PC Edition Journal
.JVC Digital Camera File
.JW Justwrite Text
Jigsaw Terminal File (Real-time financial data display)
.JWL Justwrite Text File Library
Easy CD Creator's CD Label
.JWP JWP Document (Japanese word processor)
Easy CD Creator Label File
.JZZ Jazz Spreadsheet