dni-validator

Validators for Latin American and related national ID documents. Available as both a PHP/Laravel package and a JavaScript/TypeScript package. Both packages implement the same rules and are covered by the same shared test vectors.

Supported documents

| Country | Type | Validation | PHP class | JS import | |---------|------|------------|-----------|-----------| | 🇦🇷 Argentina | CUIT/CUIL | Prefix + modulo-11 check digit | CuitCuilArgentina | /argentina | | 🇧🇷 Brazil | CPF | Two modulo-11 check digits | CpfBrazil | /brazil | | 🇧🇷 Brazil | CNPJ | Two modulo-11 check digits | CnpjBrazil | /brazil | | 🇨🇦 Canada | SIN | Luhn check digit | SinCanada | /canada | | 🇨🇱 Chile | RUT | Modulo-11 check digit | RutChile | /chile | | 🇨🇴 Colombia | CC | Structural only — 8 or 10 digits | CcColombia | /colombia | | 🇨🇴 Colombia | NIT | Structural only — 10 digits, check digit not verified | NitColombia | /colombia | | 🇨🇴 Colombia | PASS | Length only — 2 to 12 characters | PassportColombia | /colombia | | 🇪🇨 Ecuador | CI | Structural only — 10 digits, check digit not verified | CiEcuador | /ecuador | | 🇪🇨 Ecuador | RUT | Structural only — 13 digits, check digit not verified | RutEcuador | /ecuador | | 🇪🇨 Ecuador | PASS | Length only — 8 to 12 characters | PassportEcuador | /ecuador | | 🇪🇸 Spain | DNI | Modulo-23 check letter (covers DNI and NIE) | DniSpain | /spain | | 🇲🇽 Mexico | CURP | Regex + weighted checksum | CurpMexico | /mexico | | 🇵🇪 Peru | DNI | Structural only — 8 digits plus optional verification character | DniPeru | /peru | | 🇵🇪 Peru | RUC | Structural only — 11 digits with a known taxpayer prefix | RucPeru | /peru | | 🇺🇸 United States / 🇵🇷 Puerto Rico | SSN | Structural only — rejects ranges the SSA never issues | SsnUnitedStates | /united-states | | 🇺🇾 Uruguay | CI | Weighted check digit | CiUruguay | /uruguay | | 🇺🇾 Uruguay | RUT | Modulo-11 check digit | RutUruguay | /uruguay |

Rows marked Structural only or Length only verify shape or length, not a checksum: a well-formed value can still be a number that was never issued.

PHP

Install

composer require esponsor/dni-validator

Requires PHP ^8.4 and illuminate/contracts ^10|^11|^12|^13.

Direct usage

Every validator exposes validate(). Most also expose clean() (strip formatting) and format() (apply the country's display format); passport validators only expose validate(), and RutEcuador has no display format.

use Esponsor\DniValidator\CpfBrazil;
use Esponsor\DniValidator\RutChile;

$rut = new RutChile();
$rut->validate('11.111.111-1'); // true
$rut->clean('11.111.111-1');    // '111111111'
$rut->format('111111111');      // '11.111.111-1'

$cpf = new CpfBrazil();
$cpf->validate('111.444.777-35'); // true
$cpf->format('11144477735');      // '111.444.777-35'

Laravel validation rules

Each validator has a matching rule under Esponsor\DniValidator\Rules named after the validator class (CpfBrazil → CpfBrazilRule). Rules reject non-string values and fail with a Spanish message.

use Esponsor\DniValidator\Rules\CpfBrazilRule;
use Esponsor\DniValidator\Rules\RutChileRule;

$request->validate([
    'rut' => ['required', 'string', new RutChileRule()],
    'cpf' => ['required', 'string', new CpfBrazilRule()],
]);

Registry

Country and document type are matched case insensitively.

use Esponsor\DniValidator\DocumentValidatorRegistry;

DocumentValidatorRegistry::validate('CL', 'RUT', '11.111.111-1');      // true
DocumentValidatorRegistry::validate('ar', 'cuit/cuil', '20-12345678-6'); // true

$validator = DocumentValidatorRegistry::for('UY', 'RUT');
$validator->format('211003360014'); // '21-100336-001-4'

DocumentValidatorRegistry::for('CL', 'UNKNOWN'); // null

Running PHP tests

composer install
vendor/bin/pest

JavaScript / TypeScript

Install

npm install @esponsor/dni-validator

Requires Node 22+. The published npm package is the repo root package.json; packages/js holds sources and tests only.

Named imports

Import from the country subpath, or from the package root for everything at once. Function names are suffixed with the country when the same document type exists in several countries (ciUruguayValidate, ciEcuadorValidate, dniPeruValidate, dniSpainValidate).

import { rutValidate, rutFormat } from '@esponsor/dni-validator/chile';
import { cpfValidate, cnpjValidate } from '@esponsor/dni-validator/brazil';
import { rutUruguayValidate, ciUruguayValidate } from '@esponsor/dni-validator/uruguay';

rutValidate('11.111.111-1');  // true
cpfValidate('111.444.777-35'); // true

Registry

Country and document type are matched case insensitively.

import { getValidator } from '@esponsor/dni-validator';

const validator = getValidator('uy', 'rut');
validator?.validate('211003360014'); // true
validator?.format?.('211003360014'); // '21-100336-001-4'

getValidator('CL', 'UNKNOWN'); // null

Running JS tests

npm --prefix packages/js install
npm test

Contributing

See CONTRIBUTING.md. Security reports: SECURITY.md.

Shared specs

spec/<cc>/<type>.json is the language-independent contract for each document (valid, invalid with reasons, optional format_cases, and metadata). Both the PHP and JS test suites load these files through the registry, so the two runtimes cannot drift apart. See spec/README.md for the schema.

Behaviour notes

These validators were ported from the eSponsor front-end helper. The following differences are deliberate fixes:

• CL RUT validate() accepts only digits and conventional separators (., -, spaces, K). The body is limited to 1–8 digits and the check digit is computed digit-by-digit (no whole-body integer conversion). clean() may still strip other characters when formatting.
• BR CPF rejects repeated-digit values such as 111.111.111-11, which pass the checksum but are not issued. CNPJ already rejected them.
• UY CI requires 7 or 8 digits before checking the digit. Without the length guard a 12-digit Uruguayan RUT could be accepted as a CI.
• PE DNI requires 8 digits plus an optional verification character, instead of any 8 to 9 characters drawn from 0-9 and A-K.
• ES DNI/NIE and PE DNI normalise their input (uppercase, punctuation stripped) before validating, like every other validator in the package.
• PE DNI format() groups 8 digits plus the verification character (12345678-K), matching the documented placeholder.

License

MIT — Copyright (c) 2026 eSponsor