: Some online converters incorrectly concatenate vCards without proper BEGIN:VCARD and END:VCARD separators. Solution : Use a reliable converter or the Python script above. Open the .vcf in Notepad; each contact must begin with BEGIN:VCARD and end with END:VCARD .
Now, create a conversion script:
Before converting 10,000 contacts, test the converter with one or two JSON objects. Import the resulting VCF into your phone or email client to verify formatting. json to vcf converter
This method is useful if your JSON structure is irregular or you want to manually clean data before conversion.
"field_mapping": "first_name": ["firstName", "givenName", "first"], "last_name": ["lastName", "familyName", "last"], "phone": ["phone", "phoneNumber", "mobile", "cell"], "email": ["email", "emailAddress", "mail"] , "default_vcf_version": "3.0" Now, create a conversion script: Before converting 10,000
with codecs.open(output_vcf_path, 'w', encoding='utf-8') as vcf_file: # Write content
with open(output_vcf_path, 'w', encoding='utf-8') as f: f.writelines(vcf_entries) "field_mapping": "first_name": ["firstName"
"name": "Jane Smith", "phone": "+1987654321", "email": "jane.smith@example.com", "company": "Beta LLC", "title": "CTO"