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Instantly Retrieve Your Windows License Key
Lost your Windows product key? Need to reinstall Windows but can't find your activation code? Windows Product Key Viewer v3.03 is an easy-to-use utility that instantly displays your installed Windows product key (CD key) along with other important system details. Simply download, unzip, and run--your product key appears in seconds with no installation required.
Whether you're preparing for a clean reinstall, migrating to a new PC, auditing licenses across your organization, or just want a backup of your activation key before it's too late, Windows Product Key Viewer has you covered. It works on both 32-bit and 64-bit systems and supports every modern version of Windows from 7 through 11, plus Windows Server editions.
What Information Does It Display?
Windows Product Key Viewer goes far beyond just showing your product key. It gives you a complete snapshot of your Windows installation:
Windows Product Key
Your 25-character activation key (CD key), displayed and ready to copy. Hidden by default for privacy--click to reveal for 30 seconds.
Windows Version & Build
See your exact installed Windows edition, version number, service pack, and build details.
Product ID
Displays your unique Windows Product ID, useful for Microsoft support calls and license verification.
Installation Date & Time
Find out exactly when Windows was originally installed on this machine.
Registered User & Organization
See the account name and organization Windows is registered to.
System Uptime
View how long your system has been running continuously since the last restart.
Genuine License Detection
Automatically checks whether your Windows license is genuine or pirated, with clear visual indicators for each status.
VMware & Virtual Machine Detection
Identifies if Windows is running inside VMware, VirtualPC, or VirtualServer--useful for IT administrators managing virtual environments.
Windows Score
Displays the Windows Experience Index (WEI) rating for your hardware performance, where available.
IP Addresses
Lists all assigned IP addresses on the system, helpful for network troubleshooting and documentation.
Windows Updates History
Browse every installed update including Knowledge Base IDs, install dates, who installed them, and descriptions.
Advanced System Details
ReleaseID, Build Lab, Build Revision, Display Version, Installation Type, UAC status, Game Mode, and Virtualization Status.
Save, Copy, or Print Your Key
Windows Product Key Viewer makes it easy to keep a permanent record of your key and system information:
- Copy to Clipboard - Instantly copy your product key with a single click for quick pasting into activation dialogs or support forms.
- Save as a Text File - Export all displayed information to a
.txt file. Includes your product key, system details, extra information, and Windows Update history--everything in one file for archival.
- Print Windows Information - Generate a hard copy of your system report for safekeeping in physical records or IT documentation binders.
- Double-Click to Copy - Double-click on Machine GUID, Build Lab, or Product ID fields to instantly copy their values.
Who Should Use Windows Product Key Viewer?
Windows Product Key Viewer is trusted by hundreds of thousands of users worldwide. It's especially useful for:
- Home users preparing for a Windows reinstall or upgrading to a new computer and need their activation key.
- IT professionals auditing Windows licenses across multiple workstations, servers, and virtual machines in their organization.
- System administrators documenting server configurations, verifying genuine licenses, and maintaining compliance records.
- Tech support staff who need to quickly pull product keys and system details during remote or on-site support sessions.
- Anyone who purchased a PC with Windows pre-installed and never received a separate product key card or email.
Why Use Windows Product Key Viewer?
Microsoft does not provide an easy way to view your full 25-character Windows product key once Windows is installed. The built-in slmgr /dli command only shows a partial key, and digging through the registry is risky and unreliable. If you've lost your registration card, original installation media, or the email from your PC manufacturer, you might be completely unable to reinstall or reactivate Windows.
With Windows Product Key Viewer, you can retrieve your complete key in seconds--no hassle, no registry editing, no command-line expertise required. Just download, run, and your key is right there. It even detects whether your license is genuine, which is critical before attempting a reinstall.
Unlike other key finders, Windows Product Key Viewer is completely standalone--no installer, no adware, no bundled toolbars, no "premium upgrade" prompts. What you download is what you get. It has been actively developed and maintained since 2006 with regular updates to support the latest Windows versions.
Fully Portable -- Zero Installation
No Installation Required Runs directly from an .exe file. No setup wizard, no "Next, Next, Finish."
Runs From USB Copy to a flash drive and use on any PC. IT techs carry these on a keychain for on-site support.
Leaves No Trace No files left behind after use. Delete the folder and it is gone completely.
No Registry Changes Does not modify the Windows registry, system settings, or install drivers.
Self-Contained Everything the program needs lives in its own folder. No scattered DLLs or AppData clutter.
No Admin Rights Needed Runs under standard user accounts. No UAC prompts, no IT ticket required.
Lightweight Tiny footprint, typically under 1 MB. No frameworks, runtimes, or bloated dependencies.
Instant Startup Launches in under a second. No splash screens, no loading bars, no waiting.
Compatible with Modern Windows
Windows Product Key Viewer v3.03 supports both 32-bit and 64-bit Windows operating systems:
Win 11
Win 10
Win 8
Win 7
Server 2022
Server 2019
Server 2012
Server 2011
Server 2008 R2
Legacy Windows Support
Need to retrieve product keys for older Windows versions? Download Windows Product Key Viewer v2.00 for legacy system support.
Vista
XP
ME
98
95
Server 2003
Server 2000
NT Server
Download Windows Product Key Viewer
Screenshots
When you load Windows Product Key Viewer it will display this screen with detailed system information. For privacy, clicking "Reveal Windows Product Key" shows the key for only 30 seconds.
The Extra Information tab retrieves additional details from Windows 11.
The Windows Score (Windows Experience Index) displays a numerical rating of your hardware performance. A higher score means better performance.
The Windows Updates tab shows installed updates, Knowledge Base IDs, install dates, and descriptions.
Use File > Save to export all displayed information to a text file for archival purposes.
Comparison between a genuine Windows product key and a pirated key. The software detects this and displays clear indicators.
If your Windows product key is determined to not be genuine, Windows may display a warning dialog.
Windows 10 Home with a non-genuine product key. You can still copy the key, but the status is clearly indicated.
When your version of Windows does not support the Windows Score metrics.
The Extra Information tab with details retrieved from Windows 10.
Windows 7 Ultimate Edition with a non-genuine product key detected.
On older Windows versions, some fields like ReleaseID and Display Version are not available.
Windows Product Key Viewer displaying information from Windows 7.
When a product key is not genuine, the border around the Genuine Logo flashes yellow and red with a thumbs-down indicator.
A Multi Volume License detected on Windows Server. Volume licenses are cost-effective agreements for businesses to install Windows on many devices.
When the installed Windows uses a Multi Volume License, the product key displays as BBBBB-BBBBB-BBBBB-BBBBB-BBBBB since no unique key is assigned.
Windows Server 2012 with some fields unavailable despite having a genuine key.
Screenshots from Windows Product Key Viewer v2.00 on older operating systems:
When closing the application, a message invites you to support continued development.
The splash screen appears briefly after the support message and closes automatically in 10 seconds.
Windows Product Key Viewer displaying a Windows Server 2003 product key.
64-bit Windows product key detection on Windows Server 2003.
Windows Vista Ultimate running under VMware. Virtual machine detection is noted in the output.
Windows 98 product key retrieval. If you still use it, we still support it!
Version History
v3.03
April 26, 2025
Updated the loading Splash screen and RJL logo.
Fixed issue where entire window was clickable cursor.
Added self-signed certificate to validate the .exe is from RJL Software.
Reduced file size and changed the closing message.
Added a new icon to the project.
v3.02
March 15, 2025
Added x64 or x32 in Operating System Name.
Added 64-bit or 32-bit Processor Architecture display.
Moved Major, Min, Build to its own field.
Added list of all assigned IP Addresses to Extra Information tab.
Added splash screen to show it is loading the key.
Allow multiple instances of the application.
Added images to the Menu Items.
v3.01
March 5, 2025
Added column sorting on Windows Update tab.
Added all application data into the saved .txt file.
Cleaned up the user interface for consistency.
Unsupported features are now removed from UI and saved file.
v3.00
March 3, 2025
Complete re-write of the software from scratch.
This version only supports Windows 7, 8, 10, 11+ and Server 2008+.
Added Microsoft Windows Genuine Software support.
Added Licensed Users, ReleaseID, Build Lab, Display Version, Installation Type.
Added User Access Control (UAC), Game Mode, and Virtualization Status.
Added Windows Score and Windows Updates list.
Added double-click copy on Machine GUID, Build Lab, and Product ID.
End of Life: Windows Product Key Viewer v2.00 has reached end of life. You can still use v2.00 on older Windows systems, but it will not receive updates or maintenance.
v2.00
June 7, 2024
Attempted to add preliminary support for Windows 11 and Windows Server 2008, 2011, 2012, 2019, 2022.
v1.07
August 7, 2015
Attempted to add preliminary support for Windows 10. Added Windows Live ID for Windows 8.
v1.06
March 24, 2015
Significantly increased performance. Added Windows Last Boot Time and Logged in User name. Initial Windows 10 key support.
v1.05
May 30, 2013
Corrected Save functionality to include everything. Added Machine GUID and Microsoft Internal Build Number.
v1.04
April 13, 2012
Added support for Windows 8. Corrected Edition on Windows 2008 and Windows 7.
v1.03
November 26, 2009
Added support for Windows 7 and Windows 2008.
v1.02
June 19, 2007
Added VMware, VirtualPC, VirtualServer detection. Fixed Windows 95 and Vista 64-bit detection.
v1.01
December 1, 2006
Added 64-bit detection, uptime improvements, double-click refresh, open-after-save option, button menus, and Vista support.
v1.00
June 17, 2006
Initial version of Windows Product Key Viewer.
What Users Are Saying
★★★★★
"Saved me during a Windows reinstall. Retrieved my product key in seconds when I thought it was lost."
-- Jason R., IT Admin
★★★★★
"I keep this on a USB drive. It is the first tool I use on every support call."
-- Amanda G., Tech Support
★★★★★
"Audited 200 workstations using this tool. The genuine license detection is a lifesaver for compliance."
-- Carlos M., Sysadmin
Download Windows Product Key Viewer
Version Comparison
| Feature | v3.03 | v2.00 (Legacy) |
|---|
| Windows 11/10/8/7 | Yes | Limited |
| Windows Vista/XP/98/95 | No | Yes |
| Genuine License Detection | Yes | No |
| Windows Updates List | Yes | No |
| Windows Score | Yes | No |
| IP Address Display | Yes | No |
| Advanced System Details | Yes | No |
| 64-bit Support | Yes | Limited |
What's New in v3.03: Updated splash screen and RJL logo, Self-signed certificate validation, Reduced file size
Windows 7, 8, 10, 11+ · x64/x86
2.1 MB
SHA256: 82741e9c3724...211a
Freeware
Updated: April 26, 2025
Windows Vista, XP, ME, 98, 95, NT · x86
392 KB
SHA256: 16f4f589a7e8...a428
Support Windows Product Key Viewer Development
We rely on community support to keep this software available at no cost. If Windows Product Key Viewer helped you recover your product key, please consider making a contribution. Every dollar helps fund the next update.
Support and Information
Frequently Asked Questions
Find answers to common questions about Windows Product Key Viewer.
View FAQ
Need Help?
Found a bug or have a question? We are here to help.
Contact Us
Uninstall
To uninstall, simply delete the program folder. No registry entries or system files are left behind.
How to Update
Download the latest version and extract over your existing folder, or to a new location. Settings are preserved.
Privacy: This software does not collect, transmit, or store any personal data. No internet connection required.
End-User License Agreement (EULA)
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