21 Free Product Key Finder Programs

A list of the best free product key finder software programs.

If you’re preparing to reinstall a program or an operating system (like a clean install of Windows), you’ll need to find your unique product key (CD key) or serial number before continuing.

Normally this product key is located on the original install disc, or maybe in your order confirmation email. If you’ve lost your product key, you can often find it in the Windows Registry but this can be difficult, or sometimes even impossible, to do. Fortunately, there are many free key finder programs available to help.

Important: Please read our Key Finder Programs FAQ for lots of helpful information. This isn’t an easy topic, especially if you’re new to it.

Below are the top 21 free key finder programs. We also keep a list of commercial key finder programs but I highly recommend that you exhaust the options below before paying for one.

Belarc Advisor

Screenshot of Belarc Advisor 8.5c in Windows 10
 Belarc Advisor 8.5c.

Belarc Advisor is the standard when it comes to system information software. I’ve been using this program for many, many years. One small aspect of Belarc Advisor is its ability to extract product keys for many software programs, including the one for Windows.

Advantages include a display of information in your browser window, no adware/toolbars to worry about, and an extensive list of other important computer data.

Finds Keys for Operating Systems: Windows 10, Windows 8 & 8.1, Windows 7, Windows Vista, Windows Server 2012/2008/2003, Windows XP, Windows 2000, Windows NT, Windows ME, Windows 98, and Windows 95.

Finds Keys for Other Software: Microsoft Office 2013, 2010, (plus all previous versions), Microsoft enterprise products, most programs from Adobe, Nero, Corel, and more, as well as keys for popular video games.

Please try Belarc Advisor for your software and Windows key finding needs before any other program. It’s likely to provide you with the best results.

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