Canada SIN Validator
Format and Luhn checksum. Browser-side only.
Length
Luhn
Formatted
Privacy & limits
Checksum only. A valid Luhn result does not prove the SIN is assigned or active with Service Canada.
Browser-only: No data is sent to servers or saved in localStorage.
Do not enter real SINs on untrusted websites.
Related tools
Learn more — open a section when you need details