# cnpj

> Format, validate and generate CNPJ numbers

Latest version **5.1.1** (published 2026-05-08) · MIT license · 0 weekly downloads

## Install

```sh
npm install cnpj
pnpm add cnpj
yarn add cnpj
bun add cnpj
```

## Health

**Score 65/100 (B)** — status: active.

Positive: has types; esm support; no vulnerabilities; has provenance; high quality score.

Warnings: low downloads.

## Facts

| | |
|---|---|
| Version | 5.1.1 |
| Published | 2026-05-08 |
| First published | 2017-08-30 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | bundled |
| Module format | ESM + CommonJS |
| Dependencies | 0 |
| Unpacked size | 6.4 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| Provenance | attested (GitHub Actions) |
| GitHub stars | 29 |
| Maintainers | gabrielizaias |
| Keywords | cnpj, validation, brasil, brazil |

## Links

- npm: https://www.npmjs.com/package/cnpj
- Repository: https://github.com/gabeins/cnpj
- Homepage: https://github.com/gabeins/cnpj#readme
- Issues: https://github.com/gabeins/cnpj/issues
- npm.io page: https://npm.io/package/cnpj

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## Recent versions

- 5.1.1 (latest) — 2026-05-08
- 5.1.0 — 2026-05-08
- 5.0.0 — 2024-07-29
- 4.0.3 — 2023-04-12
- 4.0.1 — 2021-09-28
- 3.2.1 — 2021-09-28
- 3.2.0 — 2021-02-10
- 3.1.0 — 2020-06-21
- 3.0.0 — 2019-08-29
- 2.0.1 — 2019-07-08
- 2.0.0 — 2018-10-23
- 1.0.2 — 2017-08-31
- 1.0.1 — 2017-08-31
- 1.0.0 — 2017-08-31
- 0.2.0 — 2017-08-31
- … 1 more at https://npm.io/package/cnpj/versions

## README

# CNPJ

Format, validate and generate CNPJ numbers. Supports both numeric and the alphanumeric formats.

## Installation

### Node

```bash
npm install cnpj
```

or, if you are using jsr

```bash
npx jsr add @brazil/cnpj
```

```ts
import { validate, format, generate } from 'cnpj';
```

### Deno

```bash
deno add @brazil/cnpj
```

```ts
import { validate, format, generate } from '@brazil/cnpj';
```

## Usage

```js
// Validation
const valid = validate('38.981.218/0001-47'); // true
const validAlphanumeric = validate('12.ABC.345/01DE-35'); // true

// Format
const formatted = format(88415345000157); // 88.415.345/0001-57
const formattedAlphanumeric = format('12ABC34501DE35'); // '12.ABC.345/01DE-35'

// Generation
const generated = generate(); // randomly generated, valid CNPJ
const generatedAlphanumeric = generate({ format: 'alphanumeric' }); // randomly generated, valid alphanumeric CNPJ
```

### License

[MIT License](https://gabrielizaias.mit-license.org) © [Gabriel Silva](https://gabe.id)

---
_Source: https://npm.io/package/cnpj · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._