How to use
- Paste the value into the validation field.
- Review format and check-digit feedback.
- Fix the input if needed — nothing is sent to a server.
What it's for
Validate Canadian SIN format and Luhn check digit.
About the document
A Canadian SIN has 9 digits and uses the Luhn algorithm for the check digit.
Also useful
Need an example? Try the SIN generator.
FAQ
- Does this query official databases?
- No. Validation is algorithmic and local only.
- Does data leave my browser?
- No. Everything runs locally on your device.