NK2Edit is a utility that enables you to modify the AutoComplete list in Microsoft Outlook.
Free for personal use
Best NK2 File Viewer Alternatives ranked by AI · updated Aug 2026
A Windows utility for opening Outlook NK2 AutoComplete files and extracting their recipient entries. It is intended for users who need to inspect or export legacy AutoComplete data without building a full Outlook profile migration.
Top 6 NK2 File Viewer alternatives
A Windows utility that exports recipient addresses from Microsoft Outlook's AutoComplete cache into reusable files. It is intended for Outlook users who...
Pros
- Designed specifically for exporting Outlook AutoComplete addresses
- Simpler than manually handling Outlook data files
- Useful for transferring recipient suggestions between computers
Cons
- Windows and Outlook focused
- Less capable than full Outlook migration suites
- Limited editing and deduplication features
Free for personal use
3
MFCMAPI
Stephen Griffin
MFCMAPI is a free Windows utility for inspecting and modifying MAPI stores, including Outlook profiles and mailbox properties. It is intended for...
Pros
- Provides deeper MAPI access than dedicated reporting add-ins
- Useful for diagnosing profile and mailbox data problems
- Free and actively available as an open-source project
Cons
- Far steeper learning curve than the original product
- Easy to alter or damage mailbox data without MAPI expertise
- Does not provide a polished AutoComplete report workflow
4
ReliefJet Essentials
Relief Software
ReliefJet Essentials is an Outlook productivity and data-management suite that includes tools for copying, moving, and consolidating Outlook items and folders. It...
Pros
- Offers broader Outlook automation than Regain
- Useful for folder and item-level consolidation tasks
- Better fit for recurring Outlook administration workflows
Cons
- More complex than a dedicated PST merger
- May require configuring individual Outlook operations
- Not as direct for one-click whole-file merging
5
Auto Complete Manager
Sperry Software
An Outlook add-in for backing up, restoring, copying, and managing AutoComplete entries. It targets users who want an integrated Outlook interface instead...
Pros
- Provides backup and restore through an Outlook add-in
- More convenient for nontechnical Outlook users
- Supports copying AutoComplete data between computers
Cons
- Requires Outlook and add-in installation
- Costs more than free utilities
- Less suitable for unattended or scripted processing
From $29.95
6
NK2 Viewer
RecoveryTools
A Windows application for viewing and exporting addresses stored in Outlook NK2 AutoComplete files. It is aimed at users handling legacy Outlook...
Pros
- Provides a visual interface for legacy NK2 data
- Can export cached recipient entries into usable formats
- Useful when Outlook is unavailable or the profile is damaged
Cons
- Primarily focused on legacy NK2 files
- Paid tiers may be needed for full export functionality
- Fewer editing controls than NK2Edit
Free viewer; paid export features
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