List in alphabetic order - J
- J Java Source Format
- J2B Jazz Jackrabbit 2 Music
- J2C JPEG 2000 Code Stream
- J2D Jazz Jackrabbit Data
- J2E Jazz Jackrabbit 2 Episode
- J2I Jazz 2 Internet Link Format
- J2K JPEG 2000 Image
- J2L Jazz Jackrabbit 2 Level Format
- J2SI Jazz Jackrabbit 2 Internet Server Link
- J2W ArcExplorer World
- J3O JMonkeyEngine 3D Scene
- J6I Ricoh Digital Camera Image
- JA Jet Archive
- JAC JaStaCry Encrypted Format
- JACL IBM WebSphere Server Script
- JAD Java Application Descriptor Format
- JADE Jade Programming Language Source Code
- JAG Jagex Data Format
- JAI Jaikoz Settings
- JAM Leisure Suit Larry Magna Cum Laude Archive Format
- JAN Janome Digitizer Embroidery Object
- JAP Japanese Nintendo 64 Game ROM
- JAR Java Archive Format
- JARPACK Pack200 Packed Jar Format
- JARDESC Eclipse JAR Settings
- JARVIS Jarvis Subscriber Format
- JAS Corel PaintShop Photo Pro Bitmap Graphics Format
- JASPER JasperReports Data Format
- JAV Java Source Format
- JAVA Java Source Code Format
- JAVAJET Eclipse JET Java Template
- JAX Java Executable JAR
- JB2 JBIG2 Image
- JBC Jam STAPL Byte-Code Format
- JBF Paint Shop Pro Browser Cache Format
- JBG Image JBIG 1-bit Raster
- JBI Motoman Robot Job Format
- JBIG Joint Bi-level Image Group Format
- JBIG2 JBIG2
- JBK Juno Backup Format
- JBL Doom Scene Add-on
- JBMP JAmes OS Bitmap Image
- JBR Paint Shop Pro Brushes Format
- JBT JAWS
- JC FlashGet Partial Download
- JC! FlashGet Incomplete Download
- JCC Code Crusader Project Data
- JCCFG3 FlashGet Incomplete Download
- JCD FlashGet Saved
- JCF JAWS Configuration
- JCLIC JClic Project Format
- JCM Java Commerce Message
- JCP Jesusonic Preset Format
- JCRYPT JCRYPT Format
- JCS Java Control Source
- JCSK JetCast Skin
- JCT JCT
- JCZ Liquid Motion Animation
- JDB Symantec Endpoint Protection Update Format
- JDC JDownloader Links Format
- JDF Adobe Acrobat Job Definition Format
- JDP BlackBerry JDE
- JDW BlackBerry JDE
- JDX JSpell Dictionary
- JEB PENSIM Output
- JED Xilinx JEDEC Programming Format
- JEF Janome Embroidery Format
- JETINC Eclipse IDE Template Fragment
- JEWELQUESTSAVEDGAME Jewel Quest Saved Game
- JFD JAWS Synopsis
- JFF JAWS Ini
- JFFS2 Journalling Flash Format System 2 Disk Image
- JFI JPEG Format Interchange Image
- JFIF JPEG Format Interchange Format
- JFL SigmaPlot
- JFR WJVN Fragment
- JFS Linux/Unix Journaling System
- JFX J2 Fax
- JG4 BigJig Jigsaw Puzzle
- JGCSCS EditPad Custom Syntax Coloring Scheme Format
- JGD Corel PaintShop Photo Pro Gradients
- JGF JAWS Ini
- JGP QWS3270 PLUS Session Parameter
- JGS QWS3270 PLUS Script
- JGW JPEG World Format
- JGZ Gzipped Javascript Format
- JHM Java Help Mapping
- JHTML Java HTML Web Page
- JIA Digital Photo Navigator Album
- JIC Java Icon Format
- JIF JPEG Image Format
- JIFF JPEG Image Format
- JIG GameHouse Puzzle Jigsaw Game
- JIGSAW Jigsaw Explorer Save Format
- JIGZ Jiggsaw Puzzle
- JIS Japanese Industry Standard Text
- JISP Tkabber Emoticon Set
- JIT Aika Online Texture
- JJ Doodle C64 Compressed Image Format
- JJF Flash Jester Jugglor
- JJJS Claris Organizer Format
- JKB Quake 3 Arena Bot AI
- JKL Jedi Knight
- JKM JAWS Key Map Format
- JKS Jedi Knight Save
- JL Julia Source Code Format
- JLB PAC Mate BX Keyboard Driver
- JLC Byte Compiled Lisp-based Script
- JLS JAWS
- JMA NSRT Compressed Game
- JMD Corel PaintShop Pro Image Map Settings
- JMF Java Media Framework
- JML Java Modeling Language Specification
- JMP JMP Data Format
- JMS Voxtron TeleButler Interactive Voice Response Call Flow
- JMV Jnes Movie Format
- JMX Apache JMeter
- JNB SigmaPlot Workbook
- JNG JPEG Network Graphic
- JNILIB JNI Library
- JNL Ingres Journal
- JNLP Java Web Start Format
- JNT Windows Journal Format
- JNX Garmin Raster Map
- JO Jo Audio Format
- JO-7Z Jo Audio Format
- JOB Windows Task Scheduler Job Format
- JOBOPTIONS Adobe Joboptions Format
- JOBS VirtualDub Job
- JOD Microsoft Jet OLEDB.4.0
- JOE JOE Document
- JOINED HJ-Split Data Format
- JOML JOOB Object Modelling Language
- JOMPROJ Microsoft Visual Studio JOOB Object Model Project
- JOR Microsoft SQL Server Journal
- JOT Jot+ Notes Note Data
- JOURNALDOC SolidWorks Design Journal Template
- JOURNAL_INFO_BLOCK Apple Mac OS Xsystem
- JOY CryENGINE Facial Editor Joystick Format
- JP1 Japanese (Romaji) Text Format
- JP2 JPEG 2000 Core Image Format
- JP3 Electric Quilt
- JP4 Electric Quilt
- JP5 Electric Quilt
- JPA Joomla Installation Backup
- JPAGE Eclipse Java Scrapbook Page
- JPB Publish Manager Report
- JPC JPEG 2000 Code Stream Format
- JPD Java Process Definition
- JPE JPEG Image
- JPEG JPEG Image
- JPEGENX Egis Encrypted JPEG
- JPEG_160X120 160 X 120 Pixels JPEG Image
- JPEG_170X220 170 X 220 Pixels JPEG Image
- JPF JPEG 2000 Image
- JPG JPEG Image
- JPG2 JPEG 2000 Image
- JPGENX Egis Encrypted JPG
- JPGW JPEG World Format
- JPGX Egis Encrypted JPG Bitmap Image
- JPG_108X192 Android Picture
- JPG_128X128 Android Picture
- JPG_128X160 Android Picture
- JPG_128X96 Android Picture
- JPG_160X120 Android Picture
- JPG_160X128 Android Picture
- JPG_170X128 Android Picture
- JPG_170X220 Android Picture
- JPG_220X176 Android Picture
- JPG_240X320 Android Picture
- JPG_320X240 Android Picture
- JPG_320X320 Android Picture
- JPG_480X320 Android Picture
- JPG_512X512 Android Picture
- JPG_56X42 Android Picture
- JPG_T JPEG Image
- JPH JProbe Memory Snapshot
- JPI Jupiter Encrypted XML
- JPL JProbe Settings
- JPM JPEG 2000 Multi-layer Image Format (ISO 15444-6)
- JPN Windows Japanese Noise-Word List Format
- JPP Jigsaw Puzzle Player Puzzle Definition
- JPR JBuilder Project
- JPS Stereo JPEG Image
- JPT Jprobe Threadalyzer Memory Snapshot
- JPW World Format For JPEG
- JPX JPEG 2000 Image Format
- JPZ Puzzle Solver Puzzle
- JQ3SAVEGAME Jewel Quest III Saved Game
- JQX Microsoft Windows Help Related
- JRC PCjr Cartridge ROM Format
- JRF The Jumbot Bot Level Navigation
- JRL BioWare Aurora Game Engine Journal
- JRPRINT JasperReports Print Format
- JRS Exchange Reserve Transaction Log Format
- JRTF JAmes OS Rich Text Format
- JRXML JasperReports Layout Format
- JRZ PSP Game Data Format
- JS JavaScript Format
- JSA JRun Server Application
- JSB JAWS Script Binary
- JSC JavaScript Config
- JSD Jazer Data Format
- JSDA Jazer Data Format
- JSE JScript Encoded Format
- JSF Adobe Fireworks Batch Script
- JSFL Flash JavaScript Format
- JSH JAWS Script Header Format
- JSI JAWS Personalized Settings
- JSK JetAudio
- JSL Corel PaintShop Photo Pro Shapes
- JSM JAWS Script Message
- JSML JSim Model
- JSN Shield Now Shield
- JSO Compressed ISO Image
- JSON JavaScript Object Notation Format
- JSONP JSON-with-padding Source Code
- JSP Java Server Page
- JSPA Java Servlet Alias
- JSPF Java Server Page Fragment
- JSPX XML Java Server Page
- JSR Job Safety Report Definition
- JSS JACOsub Subtitle Format
- JST JavaServer Page Document
- JSV Java Structure Viewer
- JSX ExtendScript Script Format
- JSXBIN Binary ExtendScript Script Format
- JSXINC ExtendScript Included Script Format
- JT JT Open CAD Format
- JTB JTB JavaCC Grammar
- JTBACKUP Just Type Backup Format
- JTD Ichitaro Document
- JTDC Ichitaro Compressed Document
- JTF JPEG Tagged Interchange Format
- JTG Joint Test Action Group Configuration
- JTK Sun Microsystems Java Toolkit
- JTL JMeter Test Results
- JTP Windows Journal Template
- JTPL Rational Application Developer WebContent Theme Template
- JTS Cyberlink AVCHD Video Format
- JTT Ichitaro Document Template
- JTV J. River TV Format
- JTX ESE Transaction Log
- JUDE JUDE Project Format
- JVS JavaScript Proxy Autoconfig Format
- JVSG Video Surveillance Project
- JVT JRiver Recorded Video
- JW Microsoft WordPad
- JWC JewelCase Maker Saved
- JWG Java
- JWL Roxio Jewel Case Format
- JWR LegaSuite GUI J Walk Runtime
- JWS Java Web Services Format
- JXR JPEG XR Image
- JZ JamesZhu Internet Browser Database