15-digit to 18-digit ID Converter
ID Upgrade Guide
Conversion Algorithm
3-Step Process:
1. Year expansion: Add "19" prefix (e.g. 90→1990)
2. Sequence padding: Insert sequence code after birth date
3. Check digit: Generate per ISO 7064 standard (0-9/X)
Standard: Strictly follows GB11643-1999 national standard.
1. Year expansion: Add "19" prefix (e.g. 90→1990)
2. Sequence padding: Insert sequence code after birth date
3. Check digit: Generate per ISO 7064 standard (0-9/X)
Standard: Strictly follows GB11643-1999 national standard.
Why Upgrade?
Critical use cases:
1. Banking: Financial institutions require 18-digit IDs
2. Government: Social security systems only accept 18-digit
3. Verification: Online platforms mandate 18-digit format
2023 Data: 92% rejection rate for 15-digit IDs in official systems
1. Banking: Financial institutions require 18-digit IDs
2. Government: Social security systems only accept 18-digit
3. Verification: Online platforms mandate 18-digit format
2023 Data: 92% rejection rate for 15-digit IDs in official systems
Security Protocol
Four Safety Principles:
1. Local processing: Conversion happens in your browser
2. Zero storage: No data saved on servers
3. Auto-clear: Information erased after conversion
4. Legal compliance: Meets PIPL Article 13 requirements
Note: For personal use only. Commercial use prohibited.
1. Local processing: Conversion happens in your browser
2. Zero storage: No data saved on servers
3. Auto-clear: Information erased after conversion
4. Legal compliance: Meets PIPL Article 13 requirements
Note: For personal use only. Commercial use prohibited.
