GnuWin32: Jpeg 6b-4 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. GnuWin32: Jpeg belongs to Multimedia Tools. Also the software is known as "GnuWin32 Jpeg".
The following versions: 6b-4 and 6.4 are the most frequently downloaded ones by the program users. This free program is a product of GnuWin32. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.
From the developer:
This package contains C software to implement JPEG image compression and decompression. JPEG is a standardized compression method for full-color and gray-scale images. JPEG is intended for "real-world" scenes; cartoons and other non-realistic images are not its strong suit. JPEG is lossy, meaning that the output image is not identical to the input image.
You may want to check out more software, such as GnuWin32 Jpeg2Ps-1.9-1, GnuWin32: util-linux-ng-2.14.1 or GnuWin32: GetText, which might be similar to GnuWin32: Jpeg.