| File extension |
File description |
Developer/Producer |
| .j |
Java Source File |
Oracle |
| .j2c |
JPEG 2000 Code Stream |
Joint Photographic Experts Group |
| .j2i |
Jazz 2 Internet Link File |
Epic Games |
| .j2k |
JPEG 2000 Image |
Joint Photographic Experts Group |
| .j2l |
Jazz Jackrabbit 2 Level File |
Epic Games |
| .j3o |
jMonkeyEngine 3D Scene |
jMonkeyEngine |
| .ja |
Jet Archive |
N3V Games |
| .jac |
JaStaCry Encrypted File |
Kai Kretschmann |
| .jad |
Java Application Descriptor File |
Oracle |
| .jag |
Jagex Data File |
Jagex |
| .jam |
Jam STAPL File |
Altera |
| .jap |
Japanese Nintendo 64 Game ROM |
N/A |
| .jar |
Java Archive File |
Oracle |
| .jar.pack |
Pack200 Packed Jar File |
Oracle |
| .jarvis |
Jarvis Subscriber File |
Jarvis Acting Company |
| .jas |
Cheetah3D Model File |
Cheetah3D |
| .jasper |
JasperReports Data File |
Jaspersoft |
| .jav |
Java Source File |
Oracle |
| .java |
Java Source Code File |
Oracle |
| .jb2 |
JBIG2 Image |
Joint Bi-level Image Group |
| .jbc |
Jam STAPL Byte-Code File |
Altera |
| .jbf |
Paint Shop Pro Browser Cache File |
Corel |
| .jbi |
Motoman Robot Job File |
Motoman |
| .jbig |
Joint Bi-level Image Group File |
Joint Bi-level Image Group |
| .jbig2 |
JBIG2 |
Joint Bi-level Image Group |
| .jbk |
Juno Backup File |
Juno |
| .jbmp |
JAmes OS Bitmap Image |
JAmes OS |
| .jbr |
Paint Shop Pro Brushes File |
Corel |
| .jc |
FlashGet Partial Download |
FlashGet |
| .jc! |
FlashGet Incomplete Download |
FlashGet |
| .jclic |
JClic Project File |
JClic |
| .jcp |
JCreator Project File |
Xinox Software |
| .jcrypt |
JCRYPT File |
JMasters |
| .jcz |
Liquid Motion Animation |
Microsoft |
| .jdb |
Symantec Endpoint Protection Update File |
Symantec |
| .jdc |
JDownloader Links File |
The JDownloader Team |
| .jdf |
Adobe Acrobat Job Definition File |
Adobe Systems |
| .jed |
Xilinx JEDEC Programming File |
Xilinx |
| .jef |
Janome Embroidery Format |
Janome |
| .jfi |
JPEG File Interchange Image |
Joint Photographic Experts Group |
| .jfif |
JPEG File Interchange Format |
N/A |
| .jg4 |
BigJig Jigsaw Puzzle |
Lena Games |
| .jgcscs |
EditPad Custom Syntax Coloring Scheme File |
Just Great Software |
| .jgw |
JPEG World File |
ESRI |
| .jgz |
Gzipped Javascript File |
N/A |
| .jhtml |
Java HTML Web Page |
N/A |
| .jia |
Digital Photo Navigator Album |
JVC |
| .jic |
Java Icon File |
N/A |
| .jif |
JPEG Image File |
N/A |
| .jiff |
JPEG Image File Format |
N/A |
| .jigsaw |
Jigsaw Explorer Save File |
Carolina Road Software |
| .jis |
Japanese Industry Standard Text |
N/A |
| .jkm |
JAWS Key Map File |
Freedom Scientific |
| .jl |
Julia Source Code File |
Julia |
| .jmp |
JMP Data File |
SAS Institute |
| .jmv |
Jnes Movie File |
Jabsoft |
| .jng |
JPEG Network Graphic |
N/A |
| .jnilib |
JNI Library |
Oracle |
| .jnlp |
Java Web Start File |
Oracle |
| .jnt |
Windows Journal File |
Microsoft |
| .jo |
jo Audio File |
Abadie-jo |
| .jo-7z |
jo Audio File |
Abadie-jo |
| .job |
Windows Task Scheduler Job File |
Microsoft |
| .joboptions |
Adobe Joboptions File |
Adobe Systems |
| .joe |
JOE Document |
Cyril Hicks |
| .joined |
HJ-Split Data File |
Freebyte |
| .joy |
CryENGINE Facial Editor Joystick File |
Crytek |
| .jp1 |
Japanese (Romaji) Text File |
N/A |
| .jp2 |
JPEG 2000 Core Image File |
Joint Photographic Experts Group |
| .jpc |
JPEG 2000 Code Stream File |
Joint Photographic Experts Group |
| .jpd |
Java Process Definition |
N/A |
| .jpe |
JPEG Image |
Joint Photographic Experts Group |
| .jpeg |
JPEG Image |
Joint Photographic Experts Group |
| .jpf |
JPEG 2000 Image |
Joint Photographic Experts Group |
| .jpg |
JPEG Image |
Joint Photographic Experts Group |
| .jpg2 |
JPEG 2000 Image |
Joint Photographic Experts Group |
| .jpgw |
JPEG World File |
ESRI |
| .jph |
JProbe Memory Snapshot |
Quest |
| .jpn |
Windows Japanese Noise-Word List File |
Microsoft |
| .jpr |
JBuilder Project |
Embarcadero Technologies |
| .jps |
Stereo JPEG Image |
N/A |
| .jpw |
World File for JPEG |
ESRI |
| .jpx |
JPEG 2000 Image File |
Joint Photographic Experts Group |
| .jrc |
PCjr Cartridge ROM File |
N/A |
| .jrprint |
JasperReports Print File |
Jaspersoft |
| .jrs |
Exchange Reserve Transaction Log File |
Microsoft |
| .jrtf |
JAmes OS Rich Text File |
JAmes OS |
| .jrxml |
JasperReports Layout File |
Jaspersoft |
| .jrz |
PSP Game Data File |
Sony |
| .js |
JavaScript File |
N/A |
| .jsd |
Jazer Data File |
Jazer Solutions |
| .jsda |
Jazer Data File |
Jazer Solutions |
| .jse |
JScript Encoded File |
Microsoft |
| .jsf |
Project64 Joystick File |
Project64 |
| .jsfl |
Flash JavaScript File |
Adobe Systems |
| .jsh |
JAWS Script Header File |
Freedom Scientific |
| .json |
JavaScript Object Notation File |
N/A |
| .jsp |
Java Server Page |
Oracle |
| .jspa |
Java Servlet Alias |
N/A |
| .jspf |
Java Server Page Fragment |
Oracle |
| .jspx |
XML Java Server Page |
N/A |
| .jss |
JACOsub Subtitle File |
JACOsub |
| .jst |
JavaServer Page Document |
Oracle |
| .jsx |
ExtendScript Script File |
Adobe Systems |
| .jsxbin |
Binary ExtendScript Script File |
Adobe Systems |
| .jsxinc |
ExtendScript Included Script File |
Adobe Systems |
| .jt |
JT Open CAD File |
N/A |
| .jtbackup |
Just Type Backup File |
Shubham Kedia |
| .jtf |
JPEG Tagged Interchange Format |
N/A |
| .jtp |
Windows Journal Template |
Microsoft |
| .jts |
Cyberlink AVCHD Video File |
Cyberlink |
| .jtv |
J. River TV File |
J. River |
| .jtx |
ESE Transaction Log |
Microsoft |
| .jude |
JUDE Project File |
N/A |
| .jvs |
JavaScript Proxy Autoconfig File |
N/A |
| .jvsg |
Video Surveillance Project |
JVSG |
| .jwl |
Roxio Jewel Case File |
Roxio |
| .jws |
Java Web Services File |
BEA Systems |
| .jxr |
JPEG XR Image |
Microsoft |
