SA ID Number Decoder
Your South African ID number contains your date of birth, gender, and citizenship status. Enter it below to decode it instantly — all processing happens in your browser.
Enter ID number
Your ID number is never sent to any server — all calculations happen in your browser.
Frequently asked questions
What information is stored in a South African ID number?
Your 13-digit SA ID number contains: your date of birth (digits 1–6), a gender indicator (digits 7–10, where 0000–4999 = female and 5000–9999 = male), your citizenship status (digit 11: 0 = South African citizen, 1 = permanent resident), and a check digit (digit 13) to confirm the number hasn't been mistyped.
Is it safe to enter my ID number here?
Yes. All calculations happen entirely in your browser using JavaScript. Your ID number is never sent to any server, stored, or shared. You can verify this by disconnecting from the internet — the calculator still works.