If you've done any kind of search for a free registry cleaner, you've likely encountered many that were anything but free. It's become common to advertise that a program is a free registry cleaner even though the all important "cleaning" part will cost you.
Luckily, among the hundreds you'll find in a search, there are several very good, completely free registry cleaner tools available, ones that scan the Windows Registry and repair it!
Only freeware registry cleaner programs are included in this list. I did not include any registry cleaners that charge a fee of any kind.
In other words, there are no shareware, trialware, or other for-pay registry cleaners in my list.
Important Note About Free Registry Cleaner ListsThere are many lists of free registry cleaner programs out there but the huge majority of them include registry cleaner tools that, at some point during their download or use, charge you something.
The scanning may be free but when you get to the cleaning part, you're prompted for a credit card number. Worse yet, sometimes only the "download" is free but actually using the program is not. It's all semantics - and it's not very ethical.
I assure you that I am not affiliated with any of these registry cleaners and receive no compensation from any of them for promoting their programs. I have tested each of them personally and, at the time I used them, each one was completely free to download, scan, and clean your registry.
Please let me know if any of the free registry cleaner programs in the list I linked to above are no longer free so I can remove them.
Important: Free registry cleaner programs should only be used to troubleshoot actual issues. Registry cleaning should not be part of regular PC maintenance.