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CrypTool 2 provides a variety of cryptanalytical tools to analyze or even break classical and modern ciphers. With the current version you can, for instance, apply a ciphertext-only attack on an Enigma-encrypted ciphertext.

This page is an archive of all current builds of CrypTool 2.
The builds run on 32 and 64 Bit Windows. Please note that you need the Microsoft .NET Framework 4.7.2 to run CrypTool 2.
No admin rights are needed for the installation.
Each build is available as an .exe installer and as a compressed zip archive. Both have their own online update mechanism. The .exe installer supports registration of start menu entry, desktop link, and Explorer file type, but does not support more than one .exe installation. If in doubt, use the .exe installer.


Stable versions and releases

The most recent release version of CrypTool 2 is CrypTool 2.1 (Stable Build 8186.5). It and can be downloaded here.

Nightly Builds

Nightly builds are compiled every night based on the most current version of the source code checked into the SVN repository.
Please be aware that these builds are work in progress. They are by no means guaranteed to be stable, and they may contain experimental features that are not yet fully functional.
CrypTool 2.1 (Nightly Build 8409.1) - October-12-2019 02:23:23 - 177.709.283 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8409.1).exe
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CrypTool 2.1 (Nightly Build 8409.1).zip
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CrypTool 2.1 (Nightly Build 8406.1) - October-11-2019 02:19:43 - 177.732.079 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8406.1).exe
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CrypTool 2.1 (Nightly Build 8406.1).zip
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CrypTool 2.1 (Nightly Build 8405.1) - October-08-2019 02:19:34 - 177.693.694 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8405.1).exe
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CrypTool 2.1 (Nightly Build 8405.1).zip
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CrypTool 2.1 (Nightly Build 8404.1) - October-06-2019 02:18:51 - 177.693.452 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8404.1).exe
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CrypTool 2.1 (Nightly Build 8404.1).zip
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CrypTool 2.1 (Nightly Build 8402.1) - October-01-2019 02:19:48 - 177.691.255 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8402.1).exe
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CrypTool 2.1 (Nightly Build 8402.1).zip
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CrypTool 2.1 (Nightly Build 8400.1) - September-30-2019 12:28:17 - 177.692.888 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8400.1).exe
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CrypTool 2.1 (Nightly Build 8400.1).zip
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CrypTool 2.1 (Nightly Build 8389.2) - September-30-2019 10:43:44 - 175.910.295 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8389.2).exe
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CrypTool 2.1 (Nightly Build 8389.2).zip
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CrypTool 2.1 (Nightly Build 8385.1) - September-26-2019 02:17:41 - 177.830.231 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8385.1).exe
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CrypTool 2.1 (Nightly Build 8385.1).zip
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CrypTool 2.1 (Nightly Build 8382.1) - September-24-2019 02:17:10 - 177.848.771 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8382.1).exe
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CrypTool 2.1 (Nightly Build 8382.1).zip
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CrypTool 2.1 (Nightly Build 8375.1) - September-23-2019 02:17:17 - 177.849.262 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8375.1).exe
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CrypTool 2.1 (Nightly Build 8375.1).zip
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