Welcome to FastSum

FastSum is an extremely fast and simple solution for your files integrity control based on the time proven cryptographic algorithms. Everyone from novices to professionals can use and enjoy it.

With FastSum you can easily create checksums of the files that are important to you, save them and check their integrity in future.

Irrespective of the source file's size as a result you get a fix sized short value that is something like a fingerprint for further data invariability verification.

This Help file is organized in the following manner:

FastSum Online Help