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10 Best Free Product Key Finder Programs 2021

Best Free Product Key Finder Programs 2021

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 Windowsgistry but this can be difficult, or sometimes even impossible, to do. Many free key finder programs are available to help.

Below are the top 10 free key finder programs. There are also commercial alternatives but we recommend exhausting the options below before paying for one.

Belarc Advisor

What We Like

  • Finds keys for newer versions of Windows
  • Also locates MS Office keys
  • Shows other information about your computer
  • Very small download size
  • Lets you copy information to the clipboard
What We Don’t Like
  • Can’t be used portably (you have to install it)
  • Finds product keys for programs like Internet Explorer, that don’t use one.

Belarc Advisor is the standard when it comes to system information software. 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 or 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.

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.

Magical Jelly Bean Keyfinder

What We Like
  • Very simple interface that’s easy to understand
  • Will find your Windows 10 key as well as keys for older OSs
  • The product keys are listed automatically so you don’t have to click anything
  • Product keys can be saved to a file or copied to the clipboard
  • Includes advanced features like the option to view remote product keys
What We Don’t Like
  • Doesn’t find keys for newer MS Office programs
  • The program is sometimes identified as a virus in antivirus programs
  • Setup tries to install other, unrelated programs along with MJB Keyfinder

The Magical Jelly Bean Keyfinder program is a free utility that retrieves product keys from the registry. It also finds 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 10, 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 v2.0.10.13.

Winkeyfinder

What We Like
  • Very easy to use
  • Finds keys for Windows and Microsoft Office
  • Works as a portable program
  • You can save the results or print them off
  • Lets you change product keys in some operating systems
  • Shows results instantly
What We Don’t Like
  • Unable to locate the MS Office 2016 product key
  • Some of the advanced options might be confusing if you’re new to key finders

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.

Finds Keys for Operating Systems: Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP, Windows 2000, Windows ME, and Windows 98.

Finds Keys for Other Software: Microsoft Office 2013, 2010, 2007, 2003, XP, 2000 SP2, and 97.

Keyfider Thing

What We Like
  • Installs quickly
  • Provides a very minimal and easy-to-understand interface
  • Shows keys for Windows, MS Office, and other programs
  • You can export the keys to save them to a file
What We Don’t Like
  • Shows a key for Windows 10 and 8 but it isn’t correct
  • Setup might try to install an unnecessary program
  • Loads slower than other key finder programs

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: Windows 7, Windows Vista, Windows 2003 Server, Windows XP, Windows 2000, and Windows ME.

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

Keyfinder Thing doesn’t find the right product keys for Windows 10, Windows 8, or Windows NT, even though one may show up in the results.

Product Key Finder

What We Like
  • Finds keys for Windows 7 and older OSs
  • Uncluttered and minimal UI couldn’t be easier to use
  • Lets you export the product keys to a file
  • You can also find keys from a registry file
What We Don’t Like
  • Doesn’t show Windows 10/8 product keys
  • Setup might attempt to install another program to your computer
  • Includes zero advanced features (which you may or may not want depending on what you plan to do)

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: 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.

Product Key Finder doesn’t find keys in Windows 8 or Windows 10.

ProduKey

What We Like
  • Includes all the features you’d expect in a Microsoft-based key finder tool
  • Shows keys for Windows 10, MS Office, and other Microsoft programs
  • Can show keys from a registry file or remote computer
  • Lets you copy and export keys for backup
  • You don’t have to install it (it’s portable)
What We Don’t Like
  • Unlike some key finder tools, you can’t use this one to find product keys for non-Microsoft programs
  • Novice users can be easily confused because results include both a Product ID and a Product Key column

ProduKey is another completely free and easy to use key finder tool that performs advanced key finder tasks like loading product keys from remote registries.

Finds Keys for Operating Systems: Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP, and Windows 2000.

Finds Keys for Other Software: Microsoft Office 2013, Office 2010, Office 2007, Office 2003, Exchange Server, and SQL Server.

Windows Product Key Finder Pro

What We Like
  • Finds keys for Windows 7 and older Windows versions, plus MS Office
  • The program size is small, so it’s quick to download
  • The software is fully portable, so no install is necessary
  • Keys display instantly without having to click any buttons
  • Product keys can be backed up to a file or printed
  • The application is very easy to use and read results from
What We Don’t Like
  • Windows 10 and Windows 8 are supposedly supported, but it won’t find keys for them
  • Hasn’t been updated since 2013
  • Confusing download page
  • Only finds keys for Microsoft programs
  • Security software might falsely identify it as a threat

Gear Box’s Windows Product Key Finder Pro 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, the ability to run it from a flash drive or other portable device, no compressed files to extract, and nothing to run to display the keys. Windows Product Key Finder Pro instantly displays product keys and allows you to save or print them for safe keeping.

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

Finds Keys for Other Software: Microsoft Office 2013, Office 2010, Office 2007, Office 2003, and Office XP.

It’s said that both Windows 10 and Windows 8 are supported, but we were unable to find the product key when we tested v2.5.

WinGuggle

What We Like
  • Locates product keys for Windows 7 and older versions of Windows
  • Finds the product keys quickly and automatically
  • Keys can be copied from the program
  • The program is portable
  • Supports OEM editing
  • Also functions as a system information tool
What We Don’t Like
  • Might give false product keys for Windows 10 and Windows 8
  • Doesn’t show keys for non-Microsoft applications
  • Each time the program is started, a web page opens
  • The program opens slower than similar key finder tools

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: Windows 7, Windows Vista, and Windows XP.

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

Though WinGuggle supports Windows 8, Windows 10, and MS Office 2013, it did not find the correct keys when we tried it.

LicenseCrawler

What We Like
  • Will find product keys for Windows 10 and older Windows OSs
  • The program is easy to use
  • Also locates Microsoft Office keys
  • Finds product keys for non-Microsoft programs, too
  • The software is portable (no install is necessary)
  • You can scan a remote computer for product keys
  • Keys can be copied or saved to a file
What We Don’t Like
  • Unlike some product key finders, the results include lots of information that many won’t find useful, such as registry information
  • Lists product keys for programs that don’t use one, such as Internet Explorer

LicenseCrawler differs from other key finder programs in its almost full-text interface. We found LicenseCrawler to be effective at finding serial numbers for the many programs on a test PC.

Finds Keys for Operating Systems: Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP, Windows Server 2003, and Windows 2000.

Finds Keys for Other Software: Microsoft Office 2013, Office 2010, Office 2007, Office 2003, most Adobe products, and many more.

SIW

What We Like
  • Keys can be found for Windows 7, Vista, XP, and other older OSs
  • Also finds product keys for MS Office and lots of other non-Microsoft programs
  • Shows lots of other information about your computer
  • Small download size
What We Don’t Like
  • Windows 10/8 are not supported
  • The program no longer gets updated
  • There’s a lot of extra information beyond product keys, which can be overwhelming

SIW (System Information for Windows) is a portable program that displays tons of detailed information on your Windows installation and hardware devices.

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

Finds Keys for Other Software: Microsoft Office 2010, Office 2007, Office 2003, Office XP and other Microsoft products as well as non-Microsoft applications like Adobe products, Norton, Nero, AutoCAD, and 150+ others

SIW doesn’t run in Windows 10 or Windows 8.

SIW is no longer in development, but even though no new updates have been released in a long while, it’s still a great program.

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