Reference Sources



The Independent JPEG Group (IJG) is responsible for the reference implementation of the original JPEG standard. The reference software from the Independent JPEG Group was a key to the success of the original JPEG standard and has found widespread adoption in applications of image coding. Particularly, all contemporary digital photo cameras support the capture of images in JPEG format as the common medium for image interchange, and all image viewers, image editors, and Web browsers can display JPEG images as common standard.

The IJG implementation was first publicly released in October 1991 and has been considerably developed since that time.

In June 2009, Independent JPEG Group published a new major release (version 7) of the software package to enable a new set of features for image coding application and therewith to continue the success story of JPEG.

In January 2010, Independent JPEG Group introduced a new release (version 8) with extensions providing the fundament for the next generation image coding standard.

In January 2013, Independent JPEG Group released version 9 with improvements for the new introduced lossless coding mode.

Version 9f was released in January 2014 and is the only true source reference JPEG codec.

JPEG 9 Logo

Filename Size Last modified Type 1,181 KB 14 Jan 2024 Zip Compressed Data
jpegsrc.v9f.tar.gz 1,057 KB 14 Jan 2024 Unix Tape Archive


CHANGE LOG for Independent JPEG Group’s JPEG Software

Version 9f 14-Jan-2024

Add build system for C++Builder/RAD Studio.

Add build system for Xcode (beside configure).

Add ARM64EC (Emulation Compatible) platform support in the
Visual Studio build.

Version 9e 16-Jan-2022

Include alternate user interface files for cjpeg/djpeg.

jcparam.c: change default chrominance DC quantization factor
for lossless support. Note: Requires rebuild of test images.

rdgif.c, cderror.h: add sanity check for GIF image dimensions.
Thank to Casper Sun for cjpeg potential vulnerability report.

Add ARM and ARM64 platform support in the Visual Studio build.