PIS / PASEP / NIS / NIT Validator

About this tool

PIS, PASEP, NIS and NIT are names for the same 11-digit worker/social identifier, and they share one national algorithm: 10 base digits weighted by 3,2,9,8,7,6,5,4,3,2 with a single mod-11 check digit. This tool checks the length, rejects repeated sequences, and verifies the check digit. Technical validation only — it does not confirm the number was issued.

How it works

1. Paste a PIS/PASEP number (also called NIS or NIT), formatted or raw.
2. The validator checks the length, rejects repeated sequences, and verifies the mod-11 check digit.
3. Read the result locally in your browser — nothing is uploaded.

Example output

{
  "valid": true,
  "reason": "Valid PIS/PASEP.",
  "Formatted": "120.72642.20-7",
  "Also known as": "NIS / NIT"
}

Frequently asked questions

Does a valid PIS mean it is registered?

No. This only checks the format and mod-11 check digit — not whether the number was actually issued.

Is PIS the same as PASEP, NIS and NIT?

Yes — they are different names for the same 11-digit identifier and share one check-digit algorithm.

Does it run locally?

Yes — validation happens entirely in your browser; the number is never uploaded.

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