HKID Verifier
Validate Hong Kong Identity Card numbers using the official checksum algorithm.
Processed locally in your browser. No data is sent to servers.
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How it works
The algorithm converts the prefix letter(s) into numbers (A=1, B=2, etc.) and multiplies each digit by a weight (8, 7, 6, 5, 4, 3, 2). The sum is divided by 11, and the remainder determines the check digit.