ProduKey is a free and lightweight utility that allows you to easily retrieve, reveal, or recover lost product keys, CD keys, license and serial numbers for Microsoft Windows and Microsoft Office products. If you've misplaced your Windows or Office activation key, it can quickly display it from an existing installation. Its tiny size and simple interface make it an essential must have portable tool for any USB toolkit.
ProduKey | Windows & Microsoft Office CD Key Recovery Tool
ProduKey shown recovering a Windows product CD key
The software interface is minimal and straightforward, similar in design philosophy to other NirSoft utilities such as IEPassView. Upon launch, it automatically scans the system and displays any supported product keys it finds.
What Is ProduKey?
ProduKey is a small Windows utility developed by NirSoft that retrieves and displays product keys and serial numbers for installed Microsoft software. Supported products include:
- Microsoft Windows
- Microsoft Office
- Microsoft SQL Server (limited versions)
It is especially useful when you need to reinstall Windows or Office and no longer have access to the original product key. Instead of searching through old emails, packaging, or documentation, the serial key finder extracts the key directly from the system registry.
How ProduKey Works
Once launched, ProduKey automatically scans the local system and displays available product information, including:
- Product name
- Product key (Installation CD key / serial number / license)
- Product ID
- Installation folder
- Service pack or version details (when available)
No installation is required. The utility can be run directly from a USB flash drive, making it ideal for technicians, system administrators, or anyone who needs to recover Microsoft Windows product keys on multiple machines.
Why Use ProduKey?
This free application is useful in a variety of scenarios:
- Recovering a lost or forgotten Windows product key
- Backing up Microsoft Office license information
- Preparing for a system reinstall or hardware upgrade
- Auditing installed Microsoft software on a PC
- Adding a reliable license recovery tool to a portable USB toolkit
Because it is portable, you can carry it on a flash drive and use it on any compatible Windows system without leaving traces behind.
Specifications | Official Site | Download
- Author's Website: Project Page
- Developer: NirSoft
- License: Freeware
- Supported Operating Systems: Windows
- Portable: Yes (no installation required)
- Download: ProduKey Download
Final Thoughts
ProduKey is a simple yet extremely effective Windows product key recovery tool. Its small size, portability, and ease of use make it ideal for recovering lost Windows or Microsoft Office keys without unnecessary complexity. Whether you are preparing for a reinstall, managing multiple systems, or building a portable USB toolkit, this is a reliable utility worth keeping on hand.