| Estensione del file | Autore/Produttore | Descrizione del file |
|---|---|---|
| Estensione J | Oracle | Java Source Code |
| Estensione J2B | Epic Games, Inc. | Jazz Jackrabbit 2 Music |
| Estensione J2C | Joint Photographic Experts Group | JPEG2000 Image Format |
| Estensione J2D | Epic Games, Inc. | Jazz Jackrabbit Data |
| Estensione J2E | Epic Games, Inc. | Jazz Jackrabbit 2 Episode |
| Estensione J2I | Epic Games | Jazz Jackrabbit 2 Internet Server Link Format |
| Estensione J2K | Joint Photographic Experts Group | JPEG2000 Code Stream Image |
| Estensione J2L | Epic Games | Jazz Jackrabbit 2 Level Format |
| Estensione J2SI | Epic Games, Inc. | Jazz Jackrabbit 2 Internet Server Link |
| Estensione J2W | Esri | ArcExplorer World |
| Estensione J3O | jMonkeyEngine | JMonkeyEngine 3D Scene |
| Estensione J6I | N/A | Ricoh Digital Camera Image |
| Estensione JA | N3V Games | Jet Archive |
| Estensione JAC | Kai Kretschmann | JaStaCry Encrypted Format |
| Estensione JACL | IBM | IBM WebSphere Server Script |
| Estensione JAD | Sun Microsystems | Java Application Descriptor Format |
| Estensione JADE | N/A | Jade Programming Language Source Code |
| Estensione JAG | Jagex | Jagex Data Format |
| Estensione JAI | JThink Ltd | Jaikoz Settings |
| Estensione JAM | Sony | PS3 Unreal Tournament 3 Mod Format |
| Estensione JAN | Janome Sewing Machine Co., Ltd. | Janome Digitizer Embroidery Object |
| Estensione JAP | N/A | Japanese Nintendo 64 Game ROM |
| Estensione JAR | Oracle | Compressed Archive Format Package For Java Classes And Data Format |
| Estensione JARPACK | Oracle | Oracle Pack200 Packed JAR Format |
| Estensione JARDESC | The Eclipse Foundation | Eclipse JAR Settings |
| Estensione JARVIS | Jarvis Acting Company | Jarvis Subscriber Format |
| Estensione JAS | Cheetah3D | Cheetah3D Model Format |
| Estensione JASPER | Jaspersoft | JasperReports Data Format |
| Estensione JAV | Oracle | Java Language Source Code Format |
| Estensione JAVA | Oracle | Java Language Source Code Format |
| Estensione JAVAJET | The Eclipse Foundation | Eclipse JET Java Template |
| Estensione JAX | Oracle Corporation | Java Executable JAR |
| Estensione JB2 | Joint Bi-level Image Group | JBIG2 Image Format |
| Estensione JBC | Altera | Jam STAPL Byte-Code Format |
| Estensione JBF | Corel | Corel PaintShop Photo Pro Image Browser Format |
| Estensione JBG | N/A | Image JBIG 1-bit Raster |
| Estensione JBI | Motoman | Motoman Robot Job Format |
| Estensione JBIG | Joint Bi-level Image Group | JBIG Raster Image Graphics |
| Estensione JBIG2 | Joint Bi-level Image Group | JBIG2 |
| Estensione JBK | N/A | Juno Backup Format |
| Estensione JBL | id Software LLC | Doom Scene Add-on |
| Estensione JBMP | JAmes OS | JAmes OS Bitmap Image |
| Estensione JBR | Corel | Corel PaintShop Photo Pro Brushes Format |
| Estensione JBT | Freedom Scientific, Inc. | JAWS |
| Estensione JC | FlashGet | FlashGet Partial Download Format |
| Estensione JC! | FlashGet | FlashGet Incomplete Download Format |
| Estensione JCC | New Planet Software | Code Crusader Project Data |
| Estensione JCCFG3 | Trend Media Corporation Limited | FlashGet Incomplete Download |
| Estensione JCD | Trend Media Corporation Limited | FlashGet Saved |
| Estensione JCF | Freedom Scientific, Inc. | JAWS Configuration |
| Estensione JCLIC | JClic | JClic Project Format |
| Estensione JCM | Oracle Corporation | Java Commerce Message |
| Estensione JCP | Xinox Software | JCreator Project Format |
| Estensione JCRYPT | JMasters | JCRYPT Encrypted Format |
| Estensione JCS | Oracle Corporation | Java Control Source |
| Estensione JCSK | JetAudio Inc. | JetCast Skin |
| Estensione JCT | SourceForge.net | JCT |
| Estensione JCZ | Microsoft | Microsoft Liquid Motion Animation Format |
| Estensione JDB | Symantec | Norton Antivirus Definiton Update File Format |
| Estensione JDC | The JDownloader Team | JDownloader Links Format |
| Estensione JDF | Adobe Systems | Adobe Acrobat Job Definition Format |
| Estensione JDP | BlackBerry (Research In Motion Limited) | BlackBerry JDE |
| Estensione JDW | BlackBerry (Research In Motion Limited) | BlackBerry JDE |
| Estensione JDX | Page Scholar Inc. | JSpell Dictionary |
| Estensione JEB | N/A | PENSIM Output |
| Estensione JED | N/A | Xilinx Integrated Software Environment Device Configuration Information Format |
| Estensione JEF | Janome | Janome Embroidery Layout Format |
| Estensione JETINC | The Eclipse Foundation | Eclipse IDE Template Fragment |
| Estensione JEWELQUESTSAVEDGAME | iWin, Inc. | Jewel Quest Saved Game |
| Estensione JFD | Freedom Scientific, Inc. | JAWS Synopsis |
| Estensione JFF | Freedom Scientific, Inc. | JAWS Ini |
| Estensione JFFS2 | Various Linux developers | Journalling Flash File System 2 Disk Image |
| Estensione JFI | Joint Photographic Experts Group | JPEG File Interchange Format |
| Estensione JFIF | N/A | JPEG Interchange Format |
| Estensione JFL | Systat Software Inc. | SigmaPlot |
| Estensione JFR | Renato Nobili | WJVN Fragment |
| Estensione JFS | N/A | Linux/Unix Journaling System |
| Estensione JFX | N/A | J2 Fax |
| Estensione JG4 | Lena Games | BigJig Jigsaw Puzzle Format |
| Estensione JGCSCS | Just Great Software | EditPad Syntax Scheme |
| Estensione JGD | Corel Corporation | Corel PaintShop Photo Pro Gradients |
| Estensione JGF | Freedom Scientific, Inc. | JAWS Ini |
| Estensione JGP | Jolly Giant Software Inc. | QWS3270 PLUS Session Parameter |
| Estensione JGS | Jolly Giant Software Inc. | QWS3270 PLUS Script |
| Estensione JGW | ESRI | JPEG World Format |
| Estensione JGZ | N/A | Gzipped JavaScript Format |
| Estensione JHM | Oracle Corporation | Java Help Mapping |
| Estensione JHTML | N/A | ATG Dynamo Server Page (Java HTML) |
| Estensione JIA | JVC | Digital Photo Navigator Album |
| Estensione JIC | N/A | Java Icon Format |
| Estensione JIF | N/A | JPEG Interchange Format |
| Estensione JIFF | N/A | JPG Bitmap Image |
| Estensione JIG | GameHouse, Inc. | GameHouse Puzzle Jigsaw Game |
| Estensione JIGSAW | Carolina Road Software | Jigsaw Explorer Puzzle Format |
| Estensione JIGZ | Bitz & Pixelz BV | Jiggsaw Puzzle |
| Estensione JIS | N/A | Japanese Industry Standard Text Format |
| Estensione JISP | N/A | Tkabber Emoticon Set |
| Estensione JIT | Gala-Net Inc. | Aika Online Texture |
| Estensione JJ | N/A | Doodle C64 Compressed Image Format |
| Estensione JJF | Flash Jester | Flash Jester Jugglor |
| Estensione JJJS | Apple, Inc. | Claris Organizer Format |
| Estensione JKB | id Software LLC | Quake 3 Arena Bot AI |
| Estensione JKL | LucasArts Entertainment Company, LLC | Jedi Knight |
| Estensione JKM | Freedom Scientific | JAWS Ini Configuration Format |
| Estensione JKS | LucasArts Entertainment Company, LLC | Jedi Knight Save |
| Estensione JL | Julia | Julia Source Code Format |
| Estensione JLB | N/A | PAC Mate BX Keyboard Driver |
| Estensione JLC | N/A | Byte Compiled Lisp-based Script |
| Estensione JLS | Freedom Scientific, Inc. | JAWS |
| Estensione JMA | N/A | NSRT Compressed Game |
| Estensione JMD | Corel Corporation | Corel PaintShop Pro Image Map Settings |
| Estensione JMF | Oracle Corporation | Java Media Framework |
| Estensione JML | N/A | Java Modeling Language Specification |
| Estensione JMP | SAS Institute | SAS JMP Discovery Chart-to-statistics |
| Estensione JMS | Voxtron N.V. | Voxtron TeleButler Interactive Voice Response Call Flow |
| Estensione JMV | Jabsoft | Jnes Record Format |
| Estensione JMX | Apache Software Foundation | Apache JMeter |
| Estensione JNB | Systat Software Inc. | SigmaPlot Workbook |
| Estensione JNG | N/A | JPEG Network Graphic Format |
| Estensione JNILIB | Oracle | Mac OS X Java JNI Library Format |
| Estensione JNL | Actian Corporation | Ingres Journal |
| Estensione JNLP | N/A | Java Network Launching Protocol Format |
| Estensione JNT | Microsoft | Microsoft Windows Journal Note Format |
| Estensione JNX | N/A | Garmin Raster Map |
| Estensione JO | Abadie-jo | Jo Audio Format |
| Estensione JO-7Z | Abadie-jo | Jo Audio Format |
| Estensione JOB | Microsoft | Microsoft Windows Task Scheduler Task Object Format |
| Estensione JOBOPTIONS | Adobe Systems | Adobe Acrobat Job Options Format |
| Estensione JOBS | Avery Lee | VirtualDub Job |
| Estensione JOD | Microsoft Corporation | Microsoft Jet OLEDB.4.0 |
| Estensione JOE | Cyril Hicks | .joe Editor Document Format |
| Estensione JOINED | Freebyte | HJSplit Data Format |
| Estensione JOML | Microsoft Corporation | JOOB Object Modelling Language |
| Estensione JOMPROJ | Microsoft Corporation | Microsoft Visual Studio JOOB Object Model Project |
| Estensione JOR | Microsoft Corporation | Microsoft SQL Server Journal |
| Estensione JOT | King Stairs Software | Jot+ Notes Note Data |
| Estensione JOURNALDOC | SolidWorks Corporation | SolidWorks Design Journal Template |
| Estensione JOURNAL_INFO_BLOCK | Apple, Inc. | Apple Mac OS Xsystem |
| Estensione JOY | Crytek | CryENGINE Facial Editor Joystick Settings Format |
| Estensione JP1 | N/A | Japanese (Romaji) Text Format |
| Estensione JP2 | Joint Photographic Experts Group | JPEG 2000 Image Format (ISO 15444-1) Format |
| Estensione JP3 | Electric Quilt | Electric Quilt |
| Estensione JP4 | Electric Quilt | Electric Quilt |
| Estensione JP5 | Electric Quilt | Electric Quilt |
| Estensione JPA | N/A | Joomla Installation Backup |
| Estensione JPAGE | The Eclipse Foundation | Eclipse Java Scrapbook Page |
| Estensione JPB | JSoftware | Publish Manager Report |
| Estensione JPC | Joint Photographic Experts Group | JPEG2000 Code Stream Image Format |
| Estensione JPD | N/A | Joint PhotoDefiner Image Format |
| Estensione JPE | Joint Photographic Experts Group | JPEG Bitmap Image Format |
| Estensione JPEG | Joint Photographic Experts Group | JPEG Bitmap Image Format |
| Estensione JPEGENX | Egis Technology Inc. | Egis Encrypted JPEG |
| Estensione JPEG_160X120 | N/A | 160 X 120 Pixels JPEG Image |
| Estensione JPEG_170X220 | N/A | 170 X 220 Pixels JPEG Image |
| Estensione JPF | Joint Photographic Experts Group | JPEG 2000 Extended Image Format (ISO 15444-2) Format |
| Estensione JPG | Joint Photographic Experts Group | JPEG Bitmap Image Format |
| Estensione JPG2 | Joint Photographic Experts Group | JPEG 2000 Image Format (ISO 15444-1) Format |
| Estensione JPGENX | Egis Technology Inc. | Egis Encrypted JPG |
| Estensione JPGW | ESRI | JPEG World Format |
| Estensione JPGX | Egis Technology Inc. | Egis Encrypted JPG Bitmap Image |
| Estensione JPG_108X192 | N/A | Android Picture |
| Estensione JPG_128X128 | N/A | Android Picture |
| Estensione JPG_128X160 | N/A | Android Picture |
| Estensione JPG_128X96 | N/A | Android Picture |
| Estensione JPG_160X120 | N/A | Android Picture |
| Estensione JPG_160X128 | N/A | Android Picture |
| Estensione JPG_170X128 | N/A | Android Picture |
| Estensione JPG_170X220 | N/A | Android Picture |
| Estensione JPG_220X176 | N/A | Android Picture |
| Estensione JPG_240X320 | Google Inc. | Android Picture |
| Estensione JPG_320X240 | N/A | Android Picture |
| Estensione JPG_320X320 | N/A | Android Picture |
| Estensione JPG_480X320 | N/A | Android Picture |
| Estensione JPG_512X512 | Google Inc. | Android Picture |
| Estensione JPG_56X42 | N/A | Android Picture |
| Estensione JPG_T | N/A | JPEG Image |
| Estensione JPH | Quest | JProbe Memory Snapshot Format |
| Estensione JPI | Elfin Sp. z o.o. | Jupiter Encrypted XML |
| Estensione JPL | Quest Software, Inc. | JProbe Settings |
| Estensione JPM | N/A | JPEG 2000 Multi-layer Image Format (ISO 15444-6) |
| Estensione JPN | Microsoft | Windows Japanese Noise-Word List Format |
| Estensione JPP | N/A | Jigsaw Puzzle Player Puzzle Definition |
| Estensione JPR | N/A | Oracle JDeveloper Model Project |
| Estensione JPS | N/A | Stereospic JPEG Format |
| Estensione JPT | Quest Software, Inc. | Jprobe Threadalyzer Memory Snapshot |
| Estensione JPW | ESRI | ESRI JPEG World Format |
| Estensione JPX | Joint Photographic Experts Group | JPEG 2000 Extended Image Format (ISO 15444-2) Format |
| Estensione JPZ | N/A | Puzzle Solver Puzzle |
| Estensione JQ3SAVEGAME | iWin, Inc. | Jewel Quest III Saved Game |
| Estensione JQX | Microsoft Corporation | Microsoft Windows Help Related |
| Estensione JRC | N/A | PCjr Cartridge ROM Format |
| Estensione JRF | N/A | The Jumbot Bot Level Navigation |
| Estensione JRL | BioWare | BioWare Aurora Game Engine Journal |
| Estensione JRPRINT | Jaspersoft | JasperReports Print Format |
| Estensione JRS | Microsoft | Extensible Storage Engine (ESE) Reserve Transaction Log Format |
| Estensione JRTF | JAmes OS | JAmes OS Rich Text Format |
| Estensione JRXML | Jaspersoft | JasperReports Layout Format |
| Estensione JRZ | Sony | Sony Playstation Portable Game Data Format |
| Estensione JS | N/A | JavaScript Format |
| Estensione JSA | Adobe Systems Incorporated | JRun Server Application |
| Estensione JSB | Freedom Scientific, Inc. | JAWS Script Binary |
| Estensione JSC | N/A | JavaScript Config |
| Estensione JSD | Jazer Solutions | Jazer Financial Format |
| Estensione JSDA | Jazer Solutions | Jazer Data Format |
| Estensione JSE | N/A | JScript Encoded Script Format |
| Estensione JSF | Project64 | Project64 Joystick Settings Format |
| Estensione JSFL | Adobe Systems | Flash JavaScript Format |
| Estensione JSH | Freedom Scientific | JAWS Script Header Format |
| Estensione JSI | Freedom Scientific, Inc. | JAWS Personalized Settings |
| Estensione JSK | COWON America, Inc. | JetAudio |
| Estensione JSL | Corel Corporation | Corel PaintShop Photo Pro Shapes |
| Estensione JSM | Freedom Scientific, Inc. | JAWS Script Message |
| Estensione JSML | The NSR Physiome Project | JSim Model |
| Estensione JSN | JetSoft Co. | Shield Now Shield |
| Estensione JSO | N/A | Compressed ISO Image |
| Estensione JSON | N/A | JavaScript Object Notation Format |
| Estensione JSONP | N/A | JSON-with-padding Source Code |
| Estensione JSP | Oracle | JAVA Server Page Format |
| Estensione JSPA | N/A | Java Servlet Alias Format |
| Estensione JSPF | Oracle | Java JSP Fragment |
| Estensione JSPX | N/A | XML Java Server Page |
| Estensione JSR | N/A | Job Safety Report Definition |
| Estensione JSS | JACOsub | JACOSub Subtitle Format |
| Estensione JST | Oracle | Java Server Page |
| Estensione JSV | Steffen Webe | Java Structure Viewer |
| Estensione JSX | Adobe Systems | Adobe After Effects Script Format |
| Estensione JSXBIN | Adobe Systems | Binary JavaScript Format |
| Estensione JSXINC | Adobe Systems | ExtendScript Included Script Format |
| Estensione JT | N/A | JT Open CAD Format |
| Estensione JTB | Oracle Corporation | JTB JavaCC Grammar |
| Estensione JTBACKUP | Shubham Kedia | Just Type Notes Backup Format |
| Estensione JTD | Justsystems | Ichitaro Document |
| Estensione JTDC | Justsystems | Ichitaro Compressed Document |
| Estensione JTG | ARM Holdings plc | Joint Test Action Group Configuration |
| Estensione JTK | Oracle Corporation | Sun Microsystems Java Toolkit |
| Estensione JTL | Apache Software Foundation | JMeter Test Results |
| Estensione JTP | Microsoft | Microsoft Windows Journal Template Format |
| Estensione JTPL | IBM | Rational Application Developer WebContent Theme Template |
| Estensione JTS | Cyberlink | JVC Cyberlink AVCHD Video Format |
| Estensione JTT | Justsystems | Ichitaro Document Template |
| Estensione JTV | J. River | JRiver Media Center Recorded TV Format |
| Estensione JTX | Microsoft | ESE Transaction Log |
| Estensione JUDE | N/A | JUDE Project Format |
| Estensione JVSG | JVSG | Video Surveillance Project |
| Estensione JVT | JRiver, Inc. | JRiver Recorded Video |
| Estensione JW | N/A | Microsoft WordPad |
| Estensione JWC | NTI Corporation | JewelCase Maker Saved |
| Estensione JWG | Oracle Corporation | Java |
| Estensione JWL | Roxio | Roxio Jewel Case Format |
| Estensione JWR | Rocket Software, Inc. | LegaSuite GUI J Walk Runtime |
| Estensione JWS | BEA Systems | Oracle WebLogic Server Java Web Services Format |
| Estensione JXR | Microsoft | JPEG XR Image |
| Estensione JZ | JamesZhu Inc. | JamesZhu Internet Browser Database |
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