Json To Vcf Converter

Deep Write-Up: JSON to VCF Converter

1. Introduction

The vCard format (.vcf) is a standard for electronic business cards, used by email clients, smartphones, and contact management systems. JSON, on the other hand, is a lightweight data-interchange format. Converting JSON to VCF is essential for migrating contact data between systems, processing bulk imports, or building APIs that export contacts.

  1. Anonymize test data: Run a fake contact first (e.g., "Test User, 111-1111") to ensure the converter works.
  2. Read the Privacy Policy: Does the site store your files? Do they sell lead data?
  3. Use offline software: If you are converting client lists for GDPR or HIPAA compliance, do not use an online tool. Use Python, Node.js, or desktop software like "VCF Editor."
// Other fields if contact.organization: vcfString += "ORG:" + escapeVcf(contact.organization) + "\n" if contact.jobTitle: vcfString += "TITLE:" + escapeVcf(contact.jobTitle) + "\n" if contact.birthday: vcfString += "BDAY:" + contact.birthday + "\n" if contact.notes: vcfString += "NOTE:" + escapeVcf(contact.notes) + "\n" if contact.website: vcfString += "URL:" + contact.website + "\n" for variant in json_data: chrom = variant['CHROM'] pos = variant['POS'] id_ = variant['ID'] ref = variant['REF'] alt = ",".join(variant['ALT']) qual = variant['QUAL'] filter_ = variant['FILTER'] info = ";".join([f"key=value" for key, value in variant['INFO'].items()]) format_ = variant['FORMAT'] sample = variant['SAMPLE']['GT'] genotype = f"sample[0]|sample[1]" if len(sample) > 1 else sample[0]