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14 Free Product Key Finder Programs

A List of the Best Free Product Key Finder Software Programs

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

Normally this product key is located with the original CD or DVD. If you've lost your product key you can often find it in the Windows Registry but this can be very difficult to do. Luckily, there are many free key finder programs available to help.

Important: Please read my Key Finder Programs FAQ for more information.

Below are the top 14 free key finder programs. I keep an updated list of commercial key finder programs too.

1. Belarc Advisor

Screenshot of Belarc Advisor v8.3

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 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 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.

2. Magical Jelly Bean Keyfinder

Screenshot of Magical Jelly Bean Keyfinder v2.0.9.5

The Magical Jelly Bean Keyfinder program is a free utility that retrieves product keys from the registry. It also has the ability to find product keys for Microsoft Office programs, along with product keys from many other non-Microsoft programs.

Advantages include very small size, ease of use, instant display of product keys and multiple product key saving options.

Finds Keys for Operating Systems: Windows 8, Windows 7, Windows Vista, Windows Server 2003, Windows XP, Windows 2000, Windows ME, Windows 98, and Windows 95.

Finds Keys for Other Software: Microsoft Office 2007, Office 2003, Office XP, and several non-Microsoft programs.

The Magical Jelly Bean Keyfinder website says that this free key finder will find your Office 2010 product key but in fact it does not, at least as of v2.0.9.8.

3. Winkeyfinder

Screenshot of Winkeyfinder v1.75 in Windows 7

The Winkeyfinder program is another free utility that retrieves product keys from the Windows registry.

Advantages include small program size, no installation required, and additional features such as the ability to change registered user information and activation backup capabilities.

Finds Keys for Operating Systems: Microsoft Windows 7, Windows Vista, Windows XP, Windows 2000, Windows ME, and Windows 98.

Finds Keys for Other Software: Microsoft Office 2010, 2007, 2003, XP, 2000 SP2, and 97.

4. Keyfinder Thing

Keyfinder Thing 3.1.6

Keyfinder Thing is another free, easy to use utility that finds product keys and serial numbers hidden in the Windows registry.

Advantages include small program size, nothing to run, and support for a large list of non-Microsoft programs.

Finds Keys for Operating Systems: Microsoft Windows Vista, Windows 2003 Server, Windows XP, Windows 2000, and Windows ME. Keyfinder Thing does not work with Windows 7 or Windows NT.

Finds Keys for Other Software: Microsoft Office 2007, Office 2003, Office XP, Microsoft Money, Nero, Corel Suite, The Sims, and many more programs.

5. LicenseCrawler

LicenseCrawler 1.3

LicenseCrawler is another well put together free key finder tool.

LicenseCrawler differs from other key finder programs in its almost full-text interface, which I like. I found LicenseCrawler to be very effective at finding serial numbers for the many programs on my PC.

Finds Keys for Operating Systems: Microsoft Windows 7, Windows Vista, Windows XP, Windows Server 2003, Windows 2000, and Windows XP.

Finds Keys for Other Software: Microsoft Office 2007, Office 2003, most Adobe products, and many more.

6. ProduKey

ProduKey 1.35

ProduKey is another completely free and easy to use key finder tool.

The thing I liked best about ProduKey is how easy it is to do advanced key finder tasks like loading product keys from remote registries.

Finds Keys for Operating Systems: Microsoft Windows 7, Windows Vista, Windows XP, and Windows 2000.

Finds Keys for Other Software: Microsoft Office 2010, Office 2007, Office 2003, Exchange Server, and SQL Server.

7. Product Key Finder

Product Key Finder v2.0.9

The not-so-originally-named Product Key Finder tool is actually a pretty good key finder program.

After executing Product Key Finder, a simple window opens displaying your Windows product key along with other product keys and serial numbers that Product Key Finder can locate.

Finds Keys for Operating Systems: Microsoft Windows 7, Windows Vista, Windows Server 2008 & 2003, Windows XP, Windows 2000, Windows 98, and Windows NT.

Finds Keys for Other Software: Most Microsoft and Adobe applications, more than 200 in all according to the Product Key Finder website.

8. KeyFinder Pro 2007

KeyFinder Pro 2007

Gear Box's KeyFinder Pro 2007 is another fantastic utility that can find your Windows product keys. It can also find product keys for several Microsoft Office programs.

Advantages include a very small download size, no installation required, no compressed files to extract, and nothing to run. KeyFinder Pro 2007 instantly displays product keys and allows you to save or print them for safe keeping.

Finds Keys for Operating Systems: Microsoft Windows 7, Windows Vista, Windows Server 2003, Windows XP, and Windows 2000.

Finds Keys for Other Software: Microsoft Office 2007, Office 2003, and Office XP.

9. WinGuggle

WinGuggle 1.6

WinGuggle is a very simple key finder program. WinGuggle easily finds product keys for popular Microsoft Windows operating systems and several Microsoft Office programs.

Major advantages include a quick download size, no installation required, access to a few advanced tools, and a very simple interface. WinGuggle instantly displays your Windows and Office product keys.

Finds Keys for Operating Systems: Microsoft Windows 7, Windows Vista, and Windows XP.

Finds Keys for Other Software: Microsoft Office 2010, Office 2007, Office 2003, and Office XP.

10. RockXP

RockXP v4.0

RockXP is another free program that retrieves lost product keys from the registry.

Advantages include small program size, no installation required, and additional features such as a password generator and password retriever.

Finds Keys for Operating Systems: Microsoft Windows XP (officially) and also Windows Vista, Server 2003, 2000, ME, and 98.

Finds Keys for Other Software: Microsoft Office 2007 and Office 2003.

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