PNG and MNG tools

This is an open source project to develop tools for use in creating and manipulating PNG (Portable Network Graphics), MNG (Multiple-image Network Graphics), and JNG (JPEG Network Graphics) files.

The Sourceforge project page for pmt is here.

At present, PMT tools include:

• pngcrush, which is used for optimizing the compression of PNG files.

• pngzop, by Glenn Randers-Pehrson.

• png2uri, by Glenn Randers-Pehrson.

• pngmeta, by Dave Beckett.

• bmp2png/png2bmp, by MIYASAKA Masaru.

• A Browser Gamma Test.

• Test files containing various ICC profiles.

• Test file containing iTXt chunks.

• A plan for conversion of Exif and TIFF/EP image files to and from PNG and JNG.

• We plan to work on some other MNG and JNG supporting tools, but they fall in the vaporware category right now.

A "git" repository for pmt tools is available. You can access it by cloning git://git.code.sf.net/p/pmt/code. At present, the pngcrush application is located in the "pngcrush" branch, pngzop is in the "pngzop" branch, and the png2uri script is in the "png2uri" branch of the "pmt" repository.

The PNG, MNG, and JNG specifications are here.

Links to translations of this page, or older versions of it, are available.

This site belongs to Glenn and Nancy Randers-Pehrson, glennrp@users.sourceforge.net

Web and ftp space for this project is being provided by sourceforge.net