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JSON at a glance
JSON
RFC 8259 describes JSON as derived from ECMAScript object literals and notes its design goals as minimal, portable, textual, and a subset of JavaScript.
VCF at a glance
VCF
RFC 6350 standardized a modern vCard profile for exchanging contact-card records between systems.
Format comparison
| Feature | JSON | VCF |
|---|---|---|
| File type | Other | Other |
| Extensions |
|
|
| MIME type |
|
|
| Compression / quality | depends | depends |
| File size characteristics | depends | depends |
| Compatibility | moderate | moderate |
| Editability | moderate | moderate |
| Created year | 2001 | 1995 |
| Inventor | Douglas Crockford | Versit Consortium |
| Status | active | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Common software |
|
|
| Archival suitability | moderate | moderate |
| Metadata handling | moderate | moderate |
| Delivery profile | moderate | moderate |
| Workflow fit | exchange | exchange |
| Vector scaling | Not supported | Not supported |
| Reflowable text | Not supported | Not supported |
| Structured data | Supported | Supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use JSON
- system exchange
- automation
- specialized interoperability
- Easy to parse across nearly every modern programming environment.
When to use VCF
- system exchange
- automation
- specialized interoperability
- Broad support across contact-management systems.
FAQs
Why convert JSON to VCF?
Choose VCF as target when exporting contacts for import into phones, mail clients, CRMs, or other address-book systems.
What changes when converting JSON to VCF?
Convert to VCF when exporting contacts for import into phones, mail clients, CRMs, or other address-book systems. It is ideal for contact migration, lead handoff, customer lists, and personal address-book backups. Use it when preserving contact semantics matters more than generic tabular representation.
What should I review after converting JSON to VCF?
After conversion, review these destination checks: Open converted output in Apple Contacts and verify behavior on real samples; Compare output against the expected depends quality profile; Field support varies across clients.
How can I keep quality stable in JSON to VCF conversion?
Run representative samples, keep settings deterministic, and monitor these risks: The file can be semantically correct yet still map poorly into a target contact model; Field support varies across clients; Validate destination compatibility before large-batch conversion.