Is ProduKey legal to use?

Yes, for retrieving keys from software you own. It's a read-only viewer, not a license bypass tool.

Can ProduKey find someone else's product key remotely?

No — it only reads keys stored locally on the machine it runs on (or, per NirSoft docs, a remote machine you already have admin access to).

Why does my antivirus warn about it?

Key-recovery utilities are often flagged generically as PUA by heuristic scanners. Download directly from nirsoft.net to be sure of the source.

Does ProduKey work for Windows 11?

Check the ProduKey page on nirsoft.net for current OS support notes before relying on it.

NirSoft ProduKey: Retrieve Your Own Product Keys

Download ProduKey

ProduKey is a free NirSoft utility that reads the Windows and Microsoft Office product keys stored on the PC you run it on. It's intended for recovering keys for software you already own, not for generating or bypassing licenses.

Updated August 9, 2026 · PC Utility Hub Editorial Team

What ProduKey does

ProduKey scans the Windows registry on the local machine and displays the product key(s) used to activate Windows and installed Microsoft Office versions. It's a read-only viewer — it does not modify licenses or generate new keys.

It's most useful for recovering a key before reinstalling Windows, migrating to new hardware, or documenting keys for machines you own or administer.

How to use it

1Download ProduKey only from the official NirSoft page at nirsoft.net.
2Extract the downloaded zip file — it requires no installation.
3Run ProduKey.exe. It will immediately list detected Windows and Office product keys found on the current machine.
4Use File > Save Selected Items to export the list to a text file for your records.

Legitimate uses only

Use ProduKey only to retrieve keys for software you own or are authorized to administer, such as your own PC or machines you manage professionally. It cannot recover keys from someone else's computer, and it should never be used with unauthorized or shared license keys.

Warning: Do not use product key tools to circumvent licensing on software you have not purchased. Retrieved keys are for your own records, not for redistribution.

Why antivirus sometimes flags it

Some antivirus engines flag ProduKey and similar NirSoft password/key-recovery tools as 'PUA' (potentially unwanted application) because the same technique used to read stored keys can, in principle, be misused. This is a generic heuristic, not evidence of malware, but it's still important to download the file directly from nirsoft.net so you know exactly what you're running.

This site is an independent resource and is not affiliated with, endorsed by, or sponsored by the vendor. Always download software from the official vendor site linked below.

Alternatives built into Windows

For a digital license tied to a Microsoft account, Settings > Update & Security > Activation shows activation status without exposing the raw key.
OEM keys embedded in firmware (BIOS/UEFI) on many pre-built PCs can also be read with `wmic path softwarelicensingservice get OA3xOriginalProductKey` from an elevated Command Prompt.

Get ProduKey

Start the download and follow the setup steps described on this page.

Download now

Frequently asked questions

Is ProduKey legal to use?: Yes, for retrieving keys from software you own. It's a read-only viewer, not a license bypass tool.
Can ProduKey find someone else's product key remotely?: No — it only reads keys stored locally on the machine it runs on (or, per NirSoft docs, a remote machine you already have admin access to).
Why does my antivirus warn about it?: Key-recovery utilities are often flagged generically as PUA by heuristic scanners. Download directly from nirsoft.net to be sure of the source.
Does ProduKey work for Windows 11?: Check the ProduKey page on nirsoft.net for current OS support notes before relying on it.