JCrypTool installation instructions are available here.

The most important resource for users and developers is the integrated online help in JCrypTool. Simply click on the question mark icon in the main menu bar to open the JCrypTool help system. Or use the context sensitive help to display short instructions for the selected part.

The most important resource for developers is, besides the online help in JCrypTool, our wiki. Any JCrypTool team member is authorized to update our wiki with new information important for other developers.

Besides these two resources, some PDF documentation is available for download.

Getting started with JCrypTool development

April 2014 Edition

Presentation for JCrypTool users and developers who wish to extend JCrypTool with their own plug-ins.

Download (pdf, 1.5 MB)

Guideline for Designing the GUI in JCrypTool Plug-ins


GUI guidelines for the development of crypto plug-ins with a view.

Download (pdf, 1.0 MB)

JCrypTool Poster

A short overview of the JCrypTool project as poster presented at the PQCrypto 2010.

Download A4 (pdf, 2.6 MB) | A3 (pdf 3.3 MB)

JCrypTool News

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JCrypTool version 1.0 released

Version 1.0 of JCrypTool was released today, November 30th, 2020. It is intended for beginners and experts in cryptog...

Read more ... 11/30/20
JCrypTool updates to Eclipse 2019-06

JCrypTool weekly builds are based on the latest Eclipse version 2019-06 since July 2019.

Read more ... 07/01/19
JCrypTool Release Candidate 8 available

JCrypTool 1.0.0 Release Candidate 8 is available for download! This release contains a lot of bugfixes, feature ...

Read more ... 10/03/16