| Extension Abbreviation | Extension Full name | How to open the File Extension |
|---|---|---|
| .j | Java Source File | How to open .j file |
| .j01 | Akeeba Multi-part Backup Archive | How to open .j01 file |
| .j2c | JPEG 2000 Code Stream | How to open .j2c file |
| .j2i | Jazz 2 Internet Link File | How to open .j2i file |
| .j2k | JPEG 2000 Image | How to open .j2k file |
| .j2l | Jazz Jackrabbit 2 Level File | How to open .j2l file |
| .j3o | jMonkeyEngine 3D Scene | How to open .j3o file |
| .j64 | Atari Jaguar Game ROM | How to open .j64 file |
| .j6i | Ricoh Camera Image File | How to open .j6i file |
| .ja | Jet Archive | How to open .ja file |
| .jac | JaStaCry Encrypted File | How to open .jac file |
| .jad | Java Application Descriptor File | How to open .jad file |
| .jag | Jagex Data File | How to open .jag file |
| .jag | Atari Jaguar Game ROM | How to open .jag file |
| .jam | Jam STAPL File | How to open .jam file |
| .jam | Line 6 Device Recording | How to open .jam file |
| .jam | PS3 Unreal Tournament 3 Mod File | How to open .jam file |
| .jam | JAM Musical Score | How to open .jam file |
| .jap | Nonogram Puzzle File | How to open .jap file |
| .jap | jAlbum Project Settings File | How to open .jap file |
| .jar | Java Archive File | How to open .jar file |
| .jar.pack | Pack200 Packed Jar File | How to open .jar.pack file |
| .jarvis | Jarvis Subscriber File | How to open .jarvis file |
| .jas | Cheetah3D Model File | How to open .jas file |
| .jasper | JasperReports Data File | How to open .jasper file |
| .jav | Java Source File | How to open .jav file |
| .java | Java Source Code File | How to open .java file |
| .jb2 | JBIG2 Image | How to open .jb2 file |
| .jbc | Jam STAPL Byte-Code File | How to open .jbc file |
| .jbeam | BeamNG Vehicle Definition Format | How to open .jbeam file |
| .jbf | Paint Shop Pro Browser Cache File | How to open .jbf file |
| .jbg | Joint Bi-level Image Group File | How to open .jbg file |
| .jbi | Motoman Robot Job File | How to open .jbi file |
| .jbig | Joint Bi-level Image Group File | How to open .jbig file |
| .jbig2 | JBIG2 | How to open .jbig2 file |
| .jbk | Juno Backup File | How to open .jbk file |
| .jbmp | JAmes OS Bitmap Image | How to open .jbmp file |
| .jbr | Paint Shop Pro Brushes File | How to open .jbr file |
| .jbr | Motoman Robot Related Job File | How to open .jbr file |
| .jc | FlashGet Partial Download | How to open .jc file |
| .jc! | FlashGet Incomplete Download | How to open .jc! file |
| .jceks | JCEKS Keystore File | How to open .jceks file |
| .jcl | JCloze File | How to open .jcl file |
| .jclic | JClic Project File | How to open .jclic file |
| .jcp | JCreator Project File | How to open .jcp file |
| .jcr | Nonogram Puzzle File | How to open .jcr file |
| .jcrypt | JCRYPT File | How to open .jcrypt file |
| .jcw | JCross File | How to open .jcw file |
| .jcz | Liquid Motion Animation | How to open .jcz file |
| .jdat | J&ASoft; Data File | How to open .jdat file |
| .jdb | Symantec Endpoint Protection Update File | How to open .jdb file |
| .jdc | JDownloader Links File | How to open .jdc file |
| .jdf | Adobe Acrobat Job Definition File | How to open .jdf file |
| .jdis | JD Inno Setup Configurator | How to open .jdis file |
| .jdp | BlackBerry JDE Application Project | How to open .jdp file |
| .jdr | IROAD Dash Cam Video File | How to open .jdr file |
| .jdx | JCAMP-DX Data File | How to open .jdx file |
| .jed | Xilinx JEDEC Programming File | How to open .jed file |
| .jef | Janome Embroidery Format | How to open .jef file |
| .jem | JSON Entity Model File | How to open .jem file |
| .jet | JET Database File | How to open .jet file |
| .jex | Joplin Export File | How to open .jex file |
| .jfi | JPEG File Interchange Image | How to open .jfi file |
| .jfif | JPEG File Interchange Format | How to open .jfif file |
| .jfproj | JSON Font Project File | How to open .jfproj file |
| .jg4 | BigJig Jigsaw Puzzle | How to open .jg4 file |
| .jgc | JungleTac ROM File | How to open .jgc file |
| .jgcscs | EditPad Custom Syntax Coloring Scheme File | How to open .jgcscs file |
| .jgw | JPEG World File | How to open .jgw file |
| .jgz | Gzipped Javascript File | How to open .jgz file |
| .jhh | Tetris Online Poland Game Data Archive | How to open .jhh file |
| .jhtml | Java HTML Web Page | How to open .jhtml file |
| .jia | Digital Photo Navigator Album | How to open .jia file |
| .jic | JTAG Indirect Configuration File | How to open .jic file |
| .jif | JPEG Interchange Format Image | How to open .jif file |
| .jiff | JPEG Image File Format | How to open .jiff file |
| .jigsaw | Jigsaw Explorer Save File | How to open .jigsaw file |
| .jis | Japanese Industry Standard Text | How to open .jis file |
| .jkb | Jedi Knight Bot File | How to open .jkb file |
| .jkm | JAWS Key Map File | How to open .jkm file |
| .jks | Java Keystore File | How to open .jks file |
| .jl | Julia Source Code File | How to open .jl file |
| .jlr | Juliar Source Code File | How to open .jlr file |
| .jls | JPEG-LS Image | How to open .jls file |
| .jmc | JM-Crypt Encrypted File | How to open .jmc file |
| .jmce | JM-Crypt Encrypted File | How to open .jmce file |
| .jmck | JM-Crypt Key File | How to open .jmck file |
| .jmcp | JM-Crypt Encrypted File | How to open .jmcp file |
| .jmcr | JM-Crypt Encrypted File | How to open .jmcr file |
| .jmcx | JM-Crypt Encrypted File | How to open .jmcx file |
| .jmf | Jackhammer Project | How to open .jmf file |
| .jmp | JMP Data File | How to open .jmp file |
| .jms | Masher Project | How to open .jms file |
| .jmt | JMatch File | How to open .jmt file |
| .jmv | Jnes Movie File | How to open .jmv file |
| .jmx | JMix File | How to open .jmx file |
| .jnb | SigmaPlot Notebook File | How to open .jnb file |
| .jng | JPEG Network Graphic | How to open .jng file |
| .jnilib | JNI Library | How to open .jnilib file |
| .jnlp | Java Web Start File | How to open .jnlp file |
| .jnp | Java Web Start File | How to open .jnp file |
| .jnr | JoinNet Recording File | How to open .jnr file |
| .jnt | Windows Journal File | How to open .jnt file |
| .jnx | BirdsEye JNX Raster Map | How to open .jnx file |
| .jo | jo Audio File | How to open .jo file |
| .jo-7z | jo Audio File | How to open .jo-7z file |
| .job | MetaCAM Nest Job File | How to open .job file |
| .job | Windows Task Scheduler Job File | How to open .job file |
| .joboptions | Adobe Joboptions File | How to open .joboptions file |
| .joe | JOE Document | How to open .joe file |
| .joined | HJ-Split Data File | How to open .joined file |
| .joy | CryENGINE Facial Editor Joystick File | How to open .joy file |
| .jp1 | Japanese (Romaji) Text File | How to open .jp1 file |
| .jp2 | JPEG 2000 Core Image File | How to open .jp2 file |
| .jpa | Akeeba Backup Archive | How to open .jpa file |
| .jpc | JPEG 2000 Code Stream File | How to open .jpc file |
| .jpd | Java Process Definition | How to open .jpd file |
| .jpd | Joint PhotoDefiner Image | How to open .jpd file |
| .jpe | JPEG Image | How to open .jpe file |
| .jpeg | JPEG Image | How to open .jpeg file |
| .jpf | JPEG 2000 Image | How to open .jpf file |
| .jpg | JPEG Image | How to open .jpg file |
| .jpg2 | JPEG 2000 Image | How to open .jpg2 file |
| .jpg-large | Large JPEG Image | How to open .jpg-large file |
| .jpgw | JPEG World File | How to open .jpgw file |
| .jph | JProbe Memory Snapshot | How to open .jph file |
| .jpn | Windows Japanese Noise-Word List File | How to open .jpn file |
| .jpr | JBuilder Project | How to open .jpr file |
| .jpr | Fugawi Projection File | How to open .jpr file |
| .jps | Stereo JPEG Image | How to open .jps file |
| .jps | Akeeba Backup Archive | How to open .jps file |
| .jpw | World File for JPEG | How to open .jpw file |
| .jpx | JPEG 2000 Image File | How to open .jpx file |
| .jpx | JBuilder Project | How to open .jpx file |
| .jq2savegame | Jewel Quest 2 Saved Game | How to open .jq2savegame file |
| .jq3savegame | Jewel Quest III Saved Game | How to open .jq3savegame file |
| .jqz | JQuiz File | How to open .jqz file |
| .jrc | PCjr Cartridge ROM File | How to open .jrc file |
| .jrprint | JasperReports Print File | How to open .jrprint file |
| .jrs | Exchange Reserve Transaction Log File | How to open .jrs file |
| .jrtf | JAmes OS Rich Text File | How to open .jrtf file |
| .jrxml | JasperReports Layout File | How to open .jrxml file |
| .jrz | PSP Game Data File | How to open .jrz file |
| .js | JavaScript File | How to open .js file |
| .jsd | Jazer Data File | How to open .jsd file |
| .jsd | HP JetSuite Document | How to open .jsd file |
| .jsda | Jazer Data File | How to open .jsda file |
| .jse | JScript Encoded File | How to open .jse file |
| .jsf | Java Script Command File | How to open .jsf file |
| .jsf | Project64 Joystick File | How to open .jsf file |
| .jsfl | Animate JSFL Script File | How to open .jsfl file |
| .jsh | JAWS Script Header File | How to open .jsh file |
| .jsh | Jsh Script | How to open .jsh file |
| .jsl | Corel PaintShop Pro Shape Library | How to open .jsl file |
| .jsl | JMP Script | How to open .jsl file |
| .json | JavaScript Object Notation File | How to open .json file |
| .jsonl | JSON Lines File | How to open .jsonl file |
| .jsonlz4 | Compressed Firefox User Profile Data File | How to open .jsonlz4 file |
| .jsp | Java Server Page | How to open .jsp file |
| .jspa | Java Servlet Alias | How to open .jspa file |
| .jspf | Java Server Page Fragment | How to open .jspf file |
| .jspx | XML Java Server Page | How to open .jspx file |
| .jss | JavaScript Style Sheet File | How to open .jss file |
| .jss | JACOsub Subtitle File | How to open .jss file |
| .jss | JAWS Script | How to open .jss file |
| .jst | Jnes Save State | How to open .jst file |
| .jst | JavaServer Page Document | How to open .jst file |
| .jsx | ExtendScript Script File | How to open .jsx file |
| .jsx | React JavaScript File | How to open .jsx file |
| .jsxbin | Binary ExtendScript Script File | How to open .jsxbin file |
| .jsxinc | ExtendScript Included Script File | How to open .jsxinc file |
| .jt | JT Open CAD File | How to open .jt file |
| .jtbackup | Just Type Backup File | How to open .jtbackup file |
| .jtd | JustSystems Ichitaro Document | How to open .jtd file |
| .jtf | JPEG Tagged Interchange Format | How to open .jtf file |
| .jtp | Windows Journal Template | How to open .jtp file |
| .jts | Cyberlink AVCHD Video File | How to open .jts file |
| .jtv | JRiver TV File | How to open .jtv file |
| .jtx | Jrju Text File | How to open .jtx file |
| .jtx | ESE Transaction Log | How to open .jtx file |
| .jude | JUDE Project File | How to open .jude file |
| .juk | Juka Source Code File | How to open .juk file |
| .jv | Bitmap Brothers Video File | How to open .jv file |
| .jvs | JavaScript Proxy Autoconfig File | How to open .jvs file |
| .jvsg | Video Surveillance Project | How to open .jvsg file |
| .jvsgz | Compressed Video Surveillance Project | How to open .jvsgz file |
| .jwc | JewelCase Maker File | How to open .jwc file |
| .jwl | Roxio Jewel Case File | How to open .jwl file |
| .jwpub | Jehovah's Witnesses Publication File | How to open .jwpub file |
| .jws | Java Workspace Settings File | How to open .jws file |
| .jws | Java Web Services File | How to open .jws file |
| .jxl | JPEG XL Image | How to open .jxl file |
| .jxr | JPEG XR Image | How to open .jxr file |
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