Validate, generate and format CPF numbers


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1428May 30, 2021Apr 4, 2018Minified + gzip package size for @fnando/cpf in KB



Build Status NPM package version License: MIT Minified size Minified+Gzip size

This package does some CPF magic. It allows you to create, validate and format CPF documents.

HINT: Check out the CNPJ counter part available at https://github.com/fnando/cnpj.


This lib is available as a NPM package. To install it, use the following command:

npm install @fnando/cpf --save

If you're using Yarn (and you should):

yarn add @fnando/cpf


// Node.js-specific
const cpf = require("@fnando/cpf/commonjs");

// @import
import * as cpf from "@fnando/cpf"; // import the whole library
import { isValid as isValidCpf } from "@fnando/cpf"; // import just one function

// import via <script>; the lib will available as window.cpf
// <script src="cpf.js"></script>

//=> true

//=> true

//=> 53282085796

//=> 532.820.857-96

cpf.generate(true); // generate formatted number
//=> 838.684.734-40

cpf.generate(); // generate unformatted number
//=> 72777632898

On the web, without transformation, just use web/cpf.min.js.

Strict Validation

By default, validations will strip any characters you provide. This means that the following is valid, because only numbers will be considered:

//=> true

//=> 10168854236

If you want to strict validate strings, use the following signature:

cpf.isValid(number, strict);

The same example would now return false:

cpf.isValid("101#688!!!!!!542......36", true);
//=> false

If you find any bugs or have a feature request, please open an issue on github!

The npm package download data comes from npm's download counts api and package details come from npms.io.