New version! - TweakPNG is a low-level utility for examining and modifying PNG image files. The current version requires Windows 2000 or higher (XP, Vista, etc. - Support for 64-bit builds), though it is possible to build a copy that runs on Windows 95/98/ME. In order to use it, you will need to be at least somewhat familiar with the internal format of PNG files. For information about PNG, see the PNG home page.
To install: Create an empty directory, for example at C:\Program Files\TweakPNG, and unzip the contents of tweakpng-1.x.x.zip into it.
Only the x86\tweakpng.exe or x64\tweakpng.exe file is really necessary. If you are using a 32-bit edition of Windows, you must use the x86\tweakpng.exe file. If you are using a 64-bit edition of Windows, you can use either file, though x64\tweakpng.exe is recommended.
To run: Open the tweakpng.exe file.
To uninstall: Delete the directory you created and its contents. If you want, delete the registry key "HKEY_CURRENT_USER\SOFTWARE\Generic\TweakPNG" if it exists.
TweakPNG - 64bit software
Current version: 1.4.6
Release date: 2014-09-07