Extension Description Author File / Link
jam JamCracker Module Format Thomas Neumann Download
Joaquim-Andrew-Mats Message Base Proposal Joaquim Homrighausen Download
jar ZIP-based container for Java classes, resources, and manifest metadata Sun Microsystems / Oracle Download
java Article about class file format Deprecated resource Link
Alternative source for Java .class file format Deprecated resource Link
jbig2 JBIG2 standardized bilevel image compression (Working Draft) JPEG committee Deprecated resource Link
jed JEDEC programming specification Download
joystick Programming the PC Joystick Download
jp2 Wavelet-based image compression system and the JP2 file format, ISO/IEC 15444-1 Joint Photographic Experts Group (ISO/IEC / ITU-T T.800) Link
jpeg Common JPEG interchange file structure for compressed still images Eric Hamilton / C-Cube Microsystems Download
Explanatory article on JPEG compression Gregory K. Wallace Download
Core JPEG still-image compression standard (PostScript version) ITU-T / ISO/IEC Download
Core JPEG still-image compression standard (PDF version) ITU-T / ISO/IEC Download
JPEG Compression and the JPEG file format & sourcecode Cristian Cuturicu Download
JPEG FAQ Link
json Lightweight text-based data interchange format of objects, arrays, and values Douglas Crockford / ECMA / IETF Link
jxl Modern image format with lossy and lossless modes, wide gamut/HDR, animation, and JPEG recompression Joint Photographic Experts Group (ISO/IEC JTC 1/SC 29/WG 1) Link