Almost All File Formats and their Meanings

J

JAR Java ARchive file (a compressed file for applets and related files)
JAVA Java source code
JBF Paint Shop Pro image browser file
JFF JPEG bitmap
JIF JPEG bitmap
JMP SAS JMPDiscovery chart-to-statistics file
JN1 Epic MegaGames Jill of the Jungle data file
JPEG JPEG bitmap
JPG JPEG bitmap
JS
JTF JPEG bitmap