LatAm Tax ID Validator (NIT, RUT, RFC, CNPJ, CUIT)

Check whether Colombian NIT, Chilean RUT, Mexican RFC, Brazilian CNPJ and Argentine CUIT numbers are valid, in bulk, in seconds, without sending them anywhere.

• Five countries in one call: pass a list of IDs; the country is detected automatically or set once.
• Check digits and format: each number gets valid, the reason when it is not, and the official display format. Includes Brazil's new alphanumeric CNPJ (issued from July 2026).
• Privacy by design: numbers are validated offline. Company numbers come back in full; numbers that may belong to a person are masked, and the input is never echoed.

Output example

{
  "index": 0,
  "country": "BR",
  "idType": "CNPJ",
  "valid": true,
  "entityType": "company",
  "id": "16727230000197",
  "formatted": "16.727.230/0001-97",
  "masked": false,
  "checksumVerified": true,
  "alsoValidIn": [],
  "error": null
}

A person's number (for example an Argentine CUIT starting with 20) comes back as "id": "********682", "entityType": "person", "masked": true. Use index to match each row with your input list.

Cost

You pay per ID checked: US$0.001 per ID, so 1,000 IDs = US$1.00, plus US$0.00005 per run start. A typical run of 50 IDs costs about US$0.05.

Input

Field	Type	Default	Description
ids	array of strings	required	Tax IDs, with or without dots, dashes or slashes.
country	CO, CL, MX, BR or AR	not set	Leave it out to try every country; the others where the ID is also valid go in alsoValidIn.
maxItems	integer	1000	Stop after this many IDs.

How entity type is decided

Country	Company	Person or unknown (masked)
Colombia (NIT)	9-digit NIT from 800.000.000	Everything else (usually a cédula)
Chile (RUT)	50.000.000 and above	Below 50.000.000
Mexico (RFC)	12 characters	13 characters
Brazil (CNPJ)	Always (CNPJ is only for legal entities)	Never
Argentina (CUIT)	Prefix 30, 33 or 34	Prefix 20, 23, 24 or 27 (person), others unknown

FAQ

Does it check that the company exists or is active? No. It checks structure and check digits, which catches typos and made-up numbers. It does not query tax authorities.

Why is checksumVerified false for some Mexican RFCs? Around 1.5% of RFCs in use carry homoclave digits that do not follow the published algorithm, so an RFC with a correct format and date is still reported as valid.

Are my IDs stored? The Actor stores only the results shown above, with personal numbers masked. It never logs IDs. Like every Apify run, your input is kept in your own run storage under your Apify data retention settings.

Can AI agents use it? Yes. Input is a plain list and a run takes a few seconds.

Legal

Validation runs locally with public check-digit algorithms. No website or government service is contacted and no personal data is returned.

Related Actors

• Tax ID & VAT Number Validator (65 countries): need EU VAT, UK VAT, US EIN, ABN, GSTIN or other countries? The same offline checks for 65 countries in one call.

En español

Valida NIT (Colombia), RUT (Chile), RFC (México), CNPJ (Brasil) y CUIT (Argentina) en lote, sin enviar los números a ningún servicio. Los números de empresas se devuelven completos; los que pueden ser de personas salen enmascarados y la entrada nunca se repite en la salida.

Changelog

• 0.2: results are saved in batches (1,000 IDs in about 4 s); country no longer has an empty option, leave it out to auto-detect.
• 0.1: first version.