File Extensions beginning with the letter 'J'

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Extension currently sorted on Extension Description click to sort by Description Format MIME Type
J2C JPEG 2000. Raster image
J2K JPEG 2000. Raster image
J62 Ricoh camera format
jar Java archive
JAR Java Archive; contains all files used in an applet
JAR Java ARchive file (a compressed file for applets and related files)
JAS Picture
jas JAS Compressed Graphic File
jav Java source code
JAV Internet Program; JAVA Microsoft Visual J++ Source Code
JAVA Java source code
JAVA Same as JAV
java Java source code
JBD Database; Sigma Scan
JBF Paint Shop Pro image browser file
JBF Bitmap Picture; PaintShop Pro browser
JBIG Joint Bilevel Image Group
JBX Project Scheduler 4
JCK Liquid Motion JACK Scene Description
JDF Job Definition File. Data to control print jobs. Details.
JET Fax Document; Hybrid Jet-Fax
JFF JPEG File Format. Details
JFI truncated version of JFIF
JFIF JPEG File Interchange Format. Raster image in JPEG format. Details
JIF JPEG image
JMP SAS JMPDiscovery chart-to-statistics file
JN1 Epic MegaGames Jill of the Jungle data file
JOB Task (Job) scheduled with the Microsoft Windows XP Task Scheduler
JOD Database; Microsoft Jet OLE Database
JOR Structured Query Language (SQL) journal
JP2 JPEG 2000. Raster image
JPC JPEG Compressed. Raster image in JPEG 2000 format
JPC Japanese PIC. Raster image
JPE truncated version of JPEG [JPEG] image/jpeg
JPEG Joint Photographic Experts Group. Raster image. Details [JPEG] image/jpeg
JPG Joint Photographic Experts Group. Raster image. Details [JPEG] image/jpeg
jpr Borland JBuilder project
JPX JPEG eXtended. Raster image in JPEG 2000 format with proprietary extensions.
JS JavaScript source code
JS Internet Program; Java script; see MOCHA, PL (MIME: application/x-javascript)
js JavaScript source code
JSP A HTML page containing a reference to a Java servlet
jsp Java Server Pages
JT a 3D vector image optionally with extra non-image data. Used for 3D visualizations and interchange between CAD/CAM programs. More info.
JT Fax Document; JT Fax
JTF (2) Fax Document; Hayes JT Fax
JTF (1) Bitmap Picture; see TIF, JPG
JTF JPEG bitmap
JVG Java Vector Graphics. Image metafile (can contain vector and raster data). Details.
jw JustWrite
JW JustWrite 1.0/2.0
JW Document; Just Write word processor
JWL Just-Write
JZZ Spreadsheet; Lotus Jazz