Free Registry Defrag is a tiny but powerful software that can perform a defragmentation task on your Windows registry keys.

The user interface of the program consists of a standard window in which you can press only two buttons.

So, the first thing you need to do is let Free Registry Defrag analyze the Windows registry. This task can take several long minutes to complete, during which your operating system may not properly respond (e.g. other processes run slower). It is highly recommend you stop any other operations on your computer.

Once the scanning job is complete, you can view the result which consists of the current registry size, estimated size after compacting and the total size you will save after compacting.

After Free Registry Defrag is done defragmenting the registry, you have to restart the computer in order for the effects to take place.

The program uses a low amount of system memory and moderate CPU when it is busy with a job. The user documentation is based on detailed information displayed directly in the interface.

After an initial scanning, Free Registry Defrag promised to reduce registry space by 6%, in our case. We performed a secondary scan to verify this accuracy and it turned out to be correct.

The bottom line is that Free Registry Defrag is a very good tool for defragmenting the Windows registry. It may lack any configurable settings and its interface may be outdated, but we still recommend it to all users.