@marcuth/cpfcnpj

A lightweight, high-performance TypeScript library for validation, generation, and formatting of Brazilian documents (CPF and CNPJ).

✨ Features

• 🏎️ Ultra-fast: Minimal overhead and highly optimized algorithms.
• 🛡️ Type-safe: Built with TypeScript for excellent IDE support and reliability.
• 📦 Zero Dependencies: Keeps your bundle size small.
• 🛠️ Full Toolkit: Validate, generate, format, and unformat with ease.
• 📍 Region-Aware: CPF generation support for specific Brazilian states.
• 🆔 Alphanumeric CNPJ: Full support for the new 2026 CNPJ format.

🚀 Installation

npm install @marcuth/cpfcnpj
# or
yarn add @marcuth/cpfcnpj
# or
pnpm add @marcuth/cpfcnpj

📖 Usage

CPF (Cadastro de Pessoas Físicas)

import { cpf } from '@marcuth/cpfcnpj';

// Validation
cpf.validate('123.456.789-00'); // false
cpf.validate('52998224725');     // true

// Generation
cpf.generate();                        // '52998224725'
cpf.generate({ formatted: true });       // '529.982.247-25'
cpf.generate({ state: 'SP', formatted: true }); // SP region CPF

CNPJ (Cadastro Nacional da Pessoa Jurídica)

import { cnpj } from '@marcuth/cpfcnpj';

// Validation
cnpj.validate('12.345.678/0001-00'); // false
cnpj.validate('11.222.333/0001-81');   // true
cnpj.validate('ABC1D23E/0001-91');     // true (Alphanumeric example)

// Generation
cnpj.generate();                      // '11222333000181'
cnpj.generate({ formatted: true });    // '11.222.333/0001-81'
cnpj.generate({ alphanumeric: true }); // 'ABC1D23E000191'

🛠️ API Reference

cpf & cnpj

Both modules export the following methods:

Method	Signature	Description
validate	(value: string) => boolean	Validates the check digits and format.
generate	(options?: GenerateOptions) => string	Generates a valid document.
format	(value: string) => string	Applies standard formatting (mask).
unformat	(value: string) => string	Removes all non-digit characters.

GenerateOptions

• CPF: { formatted?: boolean, state?: string }
• CNPJ: { formatted?: boolean, alphanumeric?: boolean }

🧪 Testing

The library is fully tested with Vitest.

npm test

📄 License

Distributed under the MIT License.

---

Developed with ❤️ by Marcuth