There are four ways to get support. You can read the Users Manuals to know more about FastSum MD5 Checksum Checker and find some useful examples in using it, or take a look at the list of questions that users ask to find the answer immediately, or write a letter through the web-based form.

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Standard Edition Online Help

Command Line Edition User Manual\Usage examples

Frequently Asked Questions

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Free Download! The two integrity checkers based on cryptographic approved MD5 checksum algorithm in the one package!