I have been using Nirsoft's ProduKey. It works with Windows 8.

ProduKey is a small utility that displays the ProductID and the CD-Key of Microsoft Office (Microsoft Office 2003, Microsoft Office 2007), Windows (Including Windows 7 and Windows Vista), Exchange Server, and SQL Server installed on your computer.

Answer from Erik on Stack Exchange
🌐
GitHub
gist.github.com › wellington1993 › aab7be9ebf8956f7a3f530cee723cd50
Windows 8 Product Keys Education Purpose · GitHub
As soon as I completed the payment, they sent me the key right away. The activation process was simple — I just entered the code, followed the instructions, and within minutes, my Windows was fully activated. No errors, no issues — everything went smoothly, which was a huge relief. ... This one XWCHQ-CDMYC-9WN2C-BWWTV-YY2KV works in Windows Tiny 8...
🌐
Microsoft Learn
learn.microsoft.com › en-us › windows-server › get-started › kms-client-activation-keys
Key Management Services (KMS) client activation and product keys | Microsoft Learn
Find the Generic Volume License Keys (GVLKs) required to activate Windows and Windows Server editions using a Key Management Services (KMS) host.
Discussions

Windows 8 Product Keys
Windows 8 has product keys embedded and encrypted in UEFI. If you put in a copy of Windows 8 on a machine that had 8/ 8.1 pre-installed it will auto-recognize it. If the customer upgraded from a different operating system, you will need them to supply you with the product key to use. More on reddit.com
🌐 r/Staples
63
21
March 26, 2015
Where can I find Windows 8 product key after reinstall?
I’m trying to locate the product key for my Windows 8 installation. I recently decided to reinstall the OS on an old laptop, but I can’t seem to find the... More on techcommunity.microsoft.com
🌐 techcommunity.microsoft.com
10
0
November 28, 2024
How to obtain Windows product key online
I have just downloaded Windows 8.1. I need to upgrade my windows 8 to Windows 8.1. During the process of the upgrade I was prompted to enter the product key. I don't even know if the product key I was asked to enter is that of the Windows 8 already… More on learn.microsoft.com
🌐 learn.microsoft.com
3
2
October 7, 2023
Windows 8.1 Product Key
This is not a tech support subreddit, use r/WindowsHelp or r/TechSupport to get help with your PC ... So I just finished up yesterday talking to Microsoft chat support and she said that I have to contact Dell about my product key. Thing is, and I admit it to her as well, I changed a few product keys and I don't know the original. I had 8... More on reddit.com
🌐 r/Windows10
28
9
August 22, 2015
🌐
Scribd
scribd.com › document › 354425188 › Windows-8-Product-Keys
Windows 8/8.1 Product Keys List | PDF | Windows 8 | Microsoft Windows
This document contains over 100 product keys and serial numbers for different versions of Windows 8 including Windows 8 Professional, Windows 8.1, Windows RTM x64, and Windows developer previews. It aims to provide users with updated and working keys to activate and install these Windows operating ...
Rating: 3.6 ​ - ​ 14 votes
🌐
YouTube
youtube.com › watch
Bypass Windows 8.1 Product Key Screen Easily - YouTube
In this video, I’ll show you how to skip the product key screen during Windows 8.1 installation.Sometimes Windows 8.1 setup asks for a product key immediatel...
Published: May 23, 2026
🌐
Trulyoffice
trulyoffice.com › blogs › truly-top-picks › free-windows-8-product-keys
Free Working Windows 8/8.1 Product Keys 2024 | Truly Office
February 7, 2024 - This article has compiled a list of free Windows 8 and 8.1 product keys that are still functional in 2024. These keys can be used to either reinstall these versions of Windows or activate your existing software, ensuring a smooth and legitimate Windows experience.
Find elsewhere
🌐
Eight Forums
eightforums.com › windows 8 forums › installation & setup
Solved - Activate retail Windows 8.1 with Windows 8 Product key. | Windows 8 Help Forums
April 6, 2014 - Note that although you may previously purchase a legit Windows 8 product key, the product key is unlikely able to be used to install or upgrade to Windows 8.1. Hence you will need the following product key to initiate the install or upgrade: Windows 8 (core): 334NH-RXG76-64THK-C7CKG-D3VPT Windows 8 Pro: XHQ8N-C3MCJ-RQXB6-WCHYG-C9WKB Windows 8 Enterprise: MNDGV-M6PKV-DV4DR-CYY8X-2YRXH FHQNR-XYXYC-8PMHT-TV4PH-DRQ3H KMS setup keys (8/8.1): Appendix A: KMS Client Setup Keys The keys above will let you install 8.1, but that's all it does. After installation is complete, you will still have to activate with your own Windows 8 key.
Top answer
1 of 5
40
How to find Windows 8 product key? If you purchased Windows 8 online, the product key is usually sent to your email. Check your inbox (and even the spam folder) for any emails from Microsoft or the retailer where you bought it. Sometimes it’s just chilling there, waiting to be found!If you got a physical copy of Windows 8 (like a DVD), the product key is often on a sticker inside the case or on the packaging. If you’ve got boxes cluttering your space, dig around a bit—you might just stumble onto it!
2 of 5
40
If the previous suggestion still does not work, then it is recommended to use a product key finder instead. Product key finder software is a tool designed to retrieve software license keys or activation codes stored on a device. These tools scan the system's registry or specific files to locate and display the product keys for operating systems, productivity software, or other installed programs. They are particularly useful when users lose access to their original documentation or emails containing the license information.This type of software is especially helpful during system upgrades, reinstalls, or migrations, where reactivation of software is required. For example, if you’re reinstalling Windows or Microsoft Office, a product key finder can save time and hassle by quickly retrieving the necessary key without the need to contact support or search through old records.Additionally, Windows 8 product key finder tools are useful for businesses or individuals managing multiple licenses. By consolidating and displaying all keys in one place, these tools simplify software management, ensuring compliance and reducing the risk of losing access to purchased software.
🌐
Microsoft Support
support.microsoft.com › en-us › windows › activation › find-your-windows-product-key
Find your Windows product key | Microsoft Support
For more information, see Volume Activation for Windows 10. A product key is usually required when uninstalling or reinstalling Windows 7 or Windows 8.1. Generally, if you bought a physical copy of Windows, the product key should be on a label or card inside the box that Windows came in.
🌐
Microsoft Learn
learn.microsoft.com › en-us › answers › questions › 1384600 › how-to-obtain-windows-product-key-online
How to obtain Windows product key online - Microsoft Q&A
October 7, 2023 - 4.If your activation channel is not one of the above three, you can try to look for the product key on the label or card inside the box that Windows came in. If you’ve lost or can’t find the product key, contact the manufacturer. Hope it is helpful for you. ... This tool may work to get the product key. https://www.nirsoft.net/utils/product_cd_key_viewer.html ... https://support.microsoft.com/en-us/windows/update-to-windows-8-1-from-windows-8-17fc54a7-a465-6b5a-c1a0-34140afd0669
🌐
Tech Resourcia
techresourcia.com › home › blog › windows 8.1 product key and how to activate it
Windows 8.1 Product Key and How to Activate it | Tech Resourcia
December 31, 2025 - Step 2: Choose the option to Activate Windows from the PC settings. Step 3: Copy the Windows 8.1 product key and paste it into the box.
🌐
Scribd
scribd.com › doc › 165114583 › Windows-8-Professional-Serial-Key
Windows 8 Pro Serial Keys List | PDF
967N4-R7KXM-CJKJB-BHGCW-CPKT7 RRYGR-8JNBY-V2RJ9-TJP4P-749T7 ND8P2-BD2PB-DD8HM-2926R-CRYQH F8X33-CNV3F-RH7MY-C73YT-XP73H BDDNV-BQ27P-9P9JJ-BQJ96-KTJXV KNTGM-BGJCJ-BPH3X-XX8V4-K4PKV CDQND-9X68R-RRFYH-8G28W-82KT7 7HBX7-N6WK2-PF9HY-QVD2M-JK49V 4NMMK-QJH7K-F38H2-FQJ24-2J8XV HNRGD-JP8FC-6F6CY-2XHYY-RCWXV KQWNF-XPMXP-HDK3M-GBV69-Y7RDH F2M4V-KFNB7-9VVTW-MVRBQ-BG667 VHNT7-CPRFX-7FRVJ-T8GVM-8FDG7 GPTCC-XN297-PVGY7-J8FQY-JK49V HV3TW-MMNBG-X99YX-XV8TJ-2GV3H 2GVN8-TV3C2-K3YM7-MMRVM-BBFDH 84NRV-6CJR6-DBDXH-FYTBF-4X49V CR8NP-K37C3-MPD6Q-MBDDY-8FDG7 39DQ2-N4FYQ-GCY6F-JX8QR-TVF9V Q4NBQ-3DRJD-777XK-MJHDC-749T7 D32KW-GNPBK-CV3TW-6TB2W-K2BQH NBWPK-K86W9-27TX3-BQ7RB-KD4DH
Rating: 5 ​ - ​ 1 votes
🌐
Foundry
foundry.com
Imagination Engineered | Foundry
Foundry creates pioneering software for creative industries across Digital Design, Media and Entertainment.
🌐
Facebook
facebook.com › groups › windows8and10support › posts › 7364551883629974
How to get activation keys for Windows 8 pro?
Popular groups · Find communities for you · Over 1 billion people across the globe are using Facebook Groups to explore their favorite topics · Log in · Categories · Science & tech · Travel · Animals · Sports & fitness · Entertainment
🌐
RSPO
rspo.org › home
A global partnership to make palm oil sustainable - Roundtable on Sustainable Palm Oil (RSPO)
December 19, 2020 - When grown sustainably, palm oil protects the environment, communities, employees and wildlife. Discover how RSPO is enabling these positive impacts.
🌐
Mitsubishi Heavy Industries
mhi.com
Mitsubishi Heavy Industries, Ltd. Global Website
Welcome to the global website of Mitsubishi Heavy Industries, Ltd. Introduce Mitsubishi Heavy Industries and its group companies.
🌐
Harvard & Smithsonian
cfa.harvard.edu
Home | Center for Astrophysics | Harvard & Smithsonian
How can we expand the limits of human knowledge further into the unknown? The Center for Astrophysics is a collaboration between the Smithsonian Astrophysical Observatory and Harvard College Observatory that’s designed to ask big questions about the universe, build the tools needed to answer ...
🌐
Facebook
facebook.com › groups › windows8and10support › posts › 7716089978476161
What are the Windows settings for a specific address?
Popular groups · Find communities for you · Over 1 billion people across the globe are using Facebook Groups to explore their favorite topics · Log in · Categories · Science & tech · Travel · Animals · Sports & fitness · Entertainment