vCard Electronic Business Card (.vcf)
IETF StandardvCard Electronic Business Card (VCF) is the global standard for electronic address book contacts, allowing seamless contact sharing, phonebook synchronization, and address import across smartphones, email clients, and CRM platforms.
Convert VCF to CSV
Free in-browser VCF to CSV converter. Convert files instantly on your device.
Inspect & Metadata
Operating systems and file analyzers identify VCF files by inspecting the leading binary byte sequence:
Byte-Level Header Signature (Magic Bytes)
Operating systems and file analyzers identify VCF files by inspecting the leading binary byte sequence:
HEX SIGNATURE (OFFSET 0):
42 45 47 49 4E 3A 56 43 41 52 44ASCII REPRESENTATION: BEGIN:VCARD
Standardization: IETF RFC 6350 (vCard v4.0)
Technical Specifications
| Container Architecture | Plaintext record starting with BEGIN:VCARD and ending with END:VCARD containing structured contact properties |
| Compression | Uncompressed text (embedded photos use Base64 or URI links) |
| Byte Endianness | UTF-8 / Unicode text stream |
| Color Spaces | Embedded contact photo profiles |
| Channels & Structure | Full name (FN), structured name (N), phone numbers (TEL), emails (EMAIL), addresses (ADR), photos (PHOTO) |
| Max Dimensions | Unbounded contact list (can concatenate thousands of vCards in one .vcf file) |
| Transparency | None |
| Streaming & Progressive | Sequential card-by-card streaming parsing |
Technical Comparison Matrix: VCF vs Competitors
| Technical Attribute | VCF (Current) | CSV | JSON | LDIF |
|---|---|---|---|---|
| Mobile Phone Import | 100% native one-tap import (iOS/Android) | Requires mapping columns | Requires developer script | LDAP directory server use |
| Contact Photos | Embedded Base64 or photo URIs | None (text only) | URL or Base64 string | Base64 binary image |
| Standardization | IETF RFC 6350 (vCard 4.0) | RFC 4180 (Spreadsheet) | RFC 8259 (Web data) | RFC 2849 (LDAP directory) |
| Multiple Phone Labels | Native types (CELL, WORK, HOME) | Requires separate columns | Structured arrays | LDAP attributes |
Common Corruption Modes & Hex Recovery Guide
Imported contact names display garbled characters (e.g. '=C3=A9').
Root Cause: Quoted-Printable encoding from legacy vCard 2.1 not decoded properly into UTF-8.
Recovery: Normalize and transcode to vCard 4.0 UTF-8 using File2File Contact Converter.
Security Analysis & Parser Attack Vectors
VCF files are plain text, but malformed property values can trigger buffer overflows in phonebook apps or XSS in web contacts.
Known Attack Vectors
- Buffer overflow in smartphone address book parsers when importing massive Base64 photo strings.
- XSS injection via unsanitized contact name or note fields in webmail address books.
- Denial of service through circular contact group references.
Defensive Best Practices: Sanitize contact text fields and enforce maximum photo byte lengths during import.
Historical Origins & Milestones
Key Advantages & Pros
- Universal mobile contact standard: double-clicking a .vcf file imports contacts instantly on iPhone, Android, Mac, and Windows.
- Rich contact data: stores multiple phone numbers, email addresses, street addresses, company names, birthdays, and profile photos.
- Multi-contact support: an entire phonebook of thousands of contacts can be exported into a single .vcf file.
Technical Limitations & Cons
- Dialect differences between vCard 2.1, 3.0, and 4.0 can cause photo or accent character corruption on older phones.
- Base64-encoded contact photos can inflate the text file size significantly.
- No native relationship mapping or group synchronization hierarchy across different cloud address books.
Interesting Technical Trivia
- Every valid vCard file begins with the exact line 'BEGIN:VCARD' and ends with 'END:VCARD'.
- When you share a contact from your iPhone or Android phone via text message, your phone generates and sends a .vcf file.
- vCard was originally designed by the Versit Consortium, an alliance formed in 1994 by Apple, IBM, AT&T, and Siemens.
Frequently Asked Technical Questions
How can I transfer contacts from Android to iPhone?
Export your contacts from Android as a .vcf file, email or AirDrop it to your iPhone, and tap the file to import all contacts automatically.
Can I convert a CSV contact list to VCF?
Yes! File2File.app can convert Excel or CSV contact spreadsheets into standard .vcf files that import directly into any smartphone.
How can I open a VCF file on my computer?
You can open VCF files in Windows Contacts, Apple Contacts, Microsoft Outlook, or view and edit them online using File2File.app.