Introduction

MD5 Checksum is a small application for Win32 systems, which is able to calculate the MD5 digest from the content of any file.

You can use this tool to ensure that a file wasn't altered in any way. If e.g someone tries to insert malicious code into an executable file, its MD5 checksum changes and you will recognize that something is wrong.

Its main purpose is to create checksums for archive files, which are located on websites. There the user can also see the MD5 digest of each file. After downloading one can compare if the checksum equals the one published on the website.

For detailed information about the MD5 algorithm please refer to the RFC 1321.