Univik VCF Joiner Software

Yes. Univik VCF Joiner detects the vCard version of each input file independently. You can load a mix of vCard 2.1, 3.0 and 4.0 files simultaneously. The version mismatch is handled transparently, including encoding differences for photos and binary data, date format differences and the presence of version-specific fields like GENDER or ANNIVERSARY. Choose any output version regardless of what the inputs use.

Duplicate detection is optional and runs before any output is written. When enabled, the tool checks all contacts across all loaded source files against four independent matching strategies: UID (exact match on the vCard UID field), phone number (last 10 digits after stripping formatting), email address (case-insensitive exact match) and full name (normalised match for names of five or more characters with a space). Contacts matched as duplicates are flagged in the preview list. You review the flagged entries and decide which to include or exclude before clicking Join.

There is no limit. Load two files or two thousand in a single operation. Use Ctrl-click or Shift-click in the file picker to select multiple files, or use Add Folder to load every VCF file from a directory at once. All source files are indexed into a single unified contact list before the join operation. Files are processed in the order they were added, which is reflected in the join report.

Yes, completely. Every field from every contact in every source file is preserved in the output: all phone numbers and type labels, all email addresses, all postal addresses, embedded photos in original format, birthday, anniversary, notes, categories, IM handles, social profiles, websites and any custom X- extension fields. No data is stripped, modified or re-encoded during the join. What goes in comes out, correctly assembled into a single standards-compliant combined file.

No. All source VCF files are opened in read-only mode throughout the entire operation. The combined output is always written to a new file at a location you choose before clicking Join. Your source files remain exactly as they were before you opened the application. You can safely use your only backup copies as source files.

Yes. After loading all source files, every contact from every file is displayed in a single unified, searchable and sortable list. Each entry shows a source file indicator so you can see which file it came from. Click any contact to see its full detail panel with all stored fields. Search across name, email and company simultaneously. Sort by any column. Any duplicates flagged by optional duplicate detection are highlighted inline. You have complete visibility over what the output will contain before committing to the join.

The join_report.txt file created alongside every combined output lists: the total number of contacts in the output file, the list of all source VCF files processed, the number of contacts contributed by each source file, every contact name and the source file it came from, and any contacts that were excluded due to duplicate detection with the reason for exclusion. The report provides full data lineage for every contact in the combined output.

OS: Windows 11, Windows 10, Windows 8.1, Windows 7 (32-bit and 64-bit) and Windows Server 2019, 2016, 2012 R2, 2008. Framework: .NET Framework 4.8 or higher (included with Windows 10 and 11). Disk: 50 MB. No internet connection required. Available as a direct installer and via the Microsoft Store.

The free trial joins a limited number of contacts per operation. All features are fully available in the trial: all input versions, all output versions, duplicate detection, full contact preview, file naming options and the join report. This lets you fully verify the tool works correctly for your specific files before purchasing. The personal license at $39 removes the per-operation contact limit for a single PC. The business license at $99 covers 5 PCs with commercial use permitted.