ID Checksum (CN)

Validate 18-digit Chinese ID checksum and parse birth/gender locally.

LifeLocal compute

Local format and checksum validation only — no network, no storage.

Disclaimer: For learning and format checks only. Not proof of identity. Do not use unlawfully. Avoid entering sensitive data on shared devices.

How to use

Validate the check digit of an 18-digit Chinese resident ID and parse birth date / gender code locally. For format checks only — not identity verification. Do not enter sensitive IDs on shared devices.

FAQ

Uploaded?

Never — validation is fully local.

15-digit IDs?

ID Checksum (CN)

How to use

FAQ

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