JCrypTool installation is very simple: download the zip-archive for your platform (Linux, Mac OS X or Windows) and your architecture (x86 or x64) and extract it into a folder (e.g. C:\Program Files on Windows or /Applications on Mac OS X). Double click the main program (JCrypTool.exe on Windows) to start the program.
After the first start, the welcome page will show up. New users should read this short information; it presents some JCrypTool concepts and will make your first steps much easier.
Need help? Do you have trouble with the installation or your first steps? Discovered a bug or a problem? Feel free to contact the JCrypTool Users Group or fill a post in our forum.