VCF File Comparer
Compare two VCF (vCard) files to identify similarities, differences, and unique contacts. Perfect for analyzing contact databases, finding duplicates, or tracking changes between exports.
Smart Matching
Advanced algorithms match contacts by name, email, or combination for accurate comparisons
Visual Results
Clear visual representation of differences, similarities, and unique contacts with color coding
Field-Level Analysis
Detailed field-by-field comparison showing exactly what information differs between contacts
Flexible Criteria
Choose matching criteria based on names, email addresses, or combined logic for your needs
Summary Statistics
Get instant overview with counts of identical, different, and unique contacts across files
Privacy Protected
All comparison happens locally in your browser - your contact data never leaves your device
Comparison Analysis
🔍 What Gets Analyzed
✅ Identical Contacts
Contacts that exist in both files with exactly the same information across all fields.
⚠️ Different Contacts
Contacts found in both files but with differences in one or more fields. Shows exactly which fields differ.
📄 Unique to File 1
Contacts that exist only in the first file and have no match in the second file.
📄 Unique to File 2
Contacts that exist only in the second file and have no match in the first file.
⚙️ Matching Options
Name Only
Matches contacts based only on their full name (display name). Best for well-organized contact lists.
Email Only
Matches contacts based only on shared email addresses. Useful when names might be formatted differently.
Name OR Email (Recommended)
Matches contacts if either the name OR email address matches. Most comprehensive approach for real-world contact lists.
Perfect For
🔄 Migration Verification
Compare contact lists before and after migrating between platforms to ensure all data was transferred correctly and no information was lost.
🔍 Duplicate Detection
Identify potential duplicates across different contact sources by comparing separate VCF files and finding overlapping contacts.
📊 Data Analysis
Analyze differences between contact databases from different departments, teams, or time periods to understand data changes and inconsistencies.
🔄 Synchronization Audit
Verify sync operations between different platforms by comparing exported contact lists to identify sync failures or data corruption.
📝 Update Tracking
Track what contact information has changed over time by comparing older exports with newer ones to see additions, deletions, and modifications.
🏢 Merger Integration
During company mergers or acquisitions, compare contact databases to identify overlapping clients and avoid duplicate communications.
How to Compare Files
Upload Files
Select two VCF files you want to compare - they can be from different platforms or time periods
Choose Criteria
Select how contacts should be matched - by name, email, or combination based on your needs
Run Analysis
Click compare to analyze the files and identify similarities, differences, and unique contacts
Review Results
Browse detailed results showing differences, similarities, and unique contacts with visual indicators
Frequently Asked Questions
How accurate is the contact matching?
The matching accuracy depends on the criteria you choose. Name OR Email mode provides the most comprehensive matching for real-world contact lists where names might be formatted differently.
Can I compare files from different platforms?
Yes! The tool works with VCF files from any platform including Google Contacts, Outlook, Apple Contacts, Android, and others. It handles different vCard versions automatically.
What does "field differences" mean?
When the same contact exists in both files but has different information (like updated email or phone), it's shown as "different" with details about which specific fields don't match.
Is there a limit to file size or number of contacts?
No hard limits, but very large files (thousands of contacts) may take longer to process. All analysis happens in your browser for privacy.
Can I export the comparison results?
Currently, the tool provides visual results for review. You can screenshot or manually document findings. Export functionality may be added in future updates.
Technical Information
Matching Algorithms
- • Case-insensitive text comparison
- • Normalized whitespace handling
- • Special character filtering
- • Multi-field correlation analysis
Supported Formats
- • VCF (vCard) files (.vcf, .vcard)
- • All vCard versions (2.1, 3.0, 4.0)
- • UTF-8 and ASCII encoding
- • Files from all major platforms
Analysis Features
- • Identical contact detection
- • Field-level difference analysis
- • Unique contact identification
- • Statistical summaries
Privacy & Security
- • No data sent to servers
- • Processing in browser only
- • No registration required
- • Complete privacy protection