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NRIC / FIN Validator
Check whether an NRIC or FIN checksum is valid, without sending it anywhere.
Runs 100% in your browser - nothing leaves your device
How it works
The last letter of every NRIC/FIN is a checksum computed from the 7 digits and the prefix. This tool recomputes it locally using the standard weighted-sum algorithm. A valid checksum only means the number is well-formed - it does not mean the NRIC has been issued to anyone.
Validation happens entirely in your browser - the number is never transmitted or stored. Supports S, T, F, G and M series.