Every time that you type an email address or name in the message window of MS-Outlook, it automatically offer you a list of users and email address that you can choose.
This feature is known as 'AutoComplete' and Outlook automatically build this emails list according to user activity and save it into a file with .NK2 extension.
In some circumstances, you may need to repair or modify the values appeared in the AutoComplete list, or you may want to remove unwanted email addresses and/or to add new email addresses.
MS-Outlook doesn't provide any ability to edit this AutoComplete list, so this is where NK2Edit software can help you.
Publisher’s description
What is NK2Edit?
NK2Edit by NirSoft is free Windows software.
Installation and requirements
The publisher provides Portable and EXE (NSIS) installers for 64-bit, 32-bit and Any CPU Windows. The main installer is 427 KB. A silent install is possible with the installer’s documented switches.
Popularity and file types
The Chocolatey package has been downloaded 6,661 times. On Windows it registers 1 file type, including .nk2.
Pros / Cons
Pros
- Free to use
- Documented silent install
- Small download (427 KB)
Cons
- No update for more than a year
In short: NK2Edit is a free Windows tool for 64-bit, 32-bit and Any CPU PCs. Updates have slowed down. Administrators can deploy it unattended.
Is NK2Edit safe to download?
- The file is served by nirsoft.net, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
5AE99230E797E50E017AF8A7F71F95B545ADDAFA147042F44BA18F7082B13DC6· Open the VirusTotal report for this hash - The link answered when we last checked it (October 22, 2026)
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 1 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 3.46Latest | August 29, 2023 | 545 KB | Any CPU ZIP64-bit ZIP32-bit EXE (NSIS)32-bit ZIP |
Install from the command line
Silent install ›winget install --id NirSoft.NK2Edit -echoco install nk2edit -ynk2edit_setup.exe /SRelated guide: How to use winget: install and update apps
Information
- Publisher
- NirSoft
- Licence
- Freeware
- Price
- Free
- Requires
- Windows 11 / 10
- Architecture
- 64-bit, 32-bit, Any CPU
- Installer
- Portable, EXE (NSIS)
- Version
- 3.46
- Released
- August 29, 2023
- Added to the catalogue
- December 30, 2024
- Versions listed
- 1
- Chocolatey downloads
- 6,661
- Website
- nirsoft.net
- winget ID
- NirSoft.NK2Edit
- Chocolatey package
- nk2edit
File types it opens (1)
Ratings and reviews
No reviews yet. Be the first to rate it.
Frequently asked questions
Is NK2Edit free?
Yes. NK2Edit is free to use.
Is NK2Edit safe to download?
The download comes from nirsoft.net, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install NK2Edit with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can NK2Edit be installed silently?
Yes. The silent install page lists the exact command for each installer.
Does NK2Edit run on ARM (Windows on Arm)?
The installer is architecture-neutral.
