Fast MD5 Checksum Utility for Windows

Welcome to the fastest and easiest Windows MD5 software project. No matter the size of your important files, FastSum Windows MD5 utility produces short and strong fingerprints for each of your files that can be easily verified and shared.


FastSum MD5 utility for Windows lets you create fingerprints of your data in three ways. You can choose between the easiest step-by-step wizards, regular application interface or a command line utility, and also you can run it from the Windows Explorer context menu. This makes FastSum stand out against all the other Windows MD5 software.


Well optimized as it is FastSum CPU load is visibly lower then in other Windows MD5 utilities. It is a great choice for processing a huge number of files, entire drives or mass storage systems.

More reliable

Be sure your files are safe and sound, instantly find the changes, and track errors using time-proven cryptographic MD5 message-digest algorithm witch is the result of longstanding work of Ronald Rivest - one of the most world famous cryptographers.

Shell integration

The shell integration lets you to start FastSum from the Windows Explorer context menu. You can quickly check the integrity of several folders or entire drives with the help of easy step-by-step Wizards, as well as visually compare latest fingerprint with actual, copy it to clipboard and post it on your web site.

Global shortcut keys

When you are installing the full software package, you can also set up the global shortcut keys to run FastSum checker faster.

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