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Free, easy to use Cyclic Redundancy Check (CRC) calculator and source code generator
Python C Shell

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This directory contains the pycrc general purpose CRC utility and C source file
generator. See for more details.

See the files doc/faq.html or doc/faq.html for frequently asked questions.


pycrc requires Python 2.2.3 or later.

This program doesn't need any particular installation. You may execute the
script from any directory. On UN*X platforms, you might need to make the script
executable: chmod +x

Getting help

If you have questions about using pycrc which is not answered satisfactorily by
the documentation, please send a mail to the pycrc user mailing list
<>. The list info page is available at

If you have found a bug in pycrc, please take the time and file it to the issue
tracker at
Thanks for your collaboration.

Copyright of the generated source code

Prior to v0.6, pycrc was released under the GPL and an additional addition to
the licence was required to permit to use the generated source code in products
with a OSI unapproved licence. Since version 0.6, pycrc is released under the
terms of the MIT licence and thus such an additional clause to the licence has
become obsolete.
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