Faker

Generate massive amounts of fake (but realistic) data for testing and development.

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## ⚡️ Try it Online [Open in StackBlitz](https://fakerjs.dev/new) ## 📙 API Documentation

⚠️ You are reading the docs for the next branch ⚠️

Please proceed to the [Getting Started Guide](https://fakerjs.dev/guide/) for the **stable** release of Faker. For detailed API documentation, please select the version of the documentation you are looking for. | Version | Website | | :----------: | :------------------------ | | v8.\* (next) | https://next.fakerjs.dev/ | | v8 (stable) | https://fakerjs.dev/ | | v7 (old) | https://v7.fakerjs.dev/ | --- ## 🚀 Features - 💌 Locations - Generate valid looking Addresses, Zip Codes, Street Names, States, and Countries! - ⏰ Time-based Data - Past, present, future, recent, soon... whenever! - 🌏 Localization - Pick a locale to generate realistic looking Names, Addresses, and Phone Numbers. - 💸 Finance - Create stubbed out Account Details, Transactions, and Crypto Addresses. - 👠 Products - Generate Prices, Product Names, Adjectives, and Descriptions. - 👾 Hacker Jargon - “Try to reboot the SQL bus, maybe it will bypass the virtual application!” - 🧍 Names - Generate virtual humans with a complete online and offline identity. - 🔢 Numbers - Of course, we can also generate random numbers and strings. > **Note**: Faker tries to generate realistic data and not obvious fake data. > The generated names, addresses, emails, phone numbers, and/or other data might be coincidentally valid information. > Please do not send any of your messages/calls to them from your test setup. ## 📦 Install ```bash npm install --save-dev @faker-js/faker ``` ## 🪄 Usage ```ts // ESM import { faker } from '@faker-js/faker'; // CJS const { faker } = require('@faker-js/faker'); export function createRandomUser(): User { return { userId: faker.string.uuid(), username: faker.internet.userName(), email: faker.internet.email(), avatar: faker.image.avatar(), password: faker.internet.password(), birthdate: faker.date.birthdate(), registeredAt: faker.date.past(), }; } export const USERS: User[] = faker.helpers.multiple(createRandomUser, { count: 5, }); ``` ## 💎 Modules An in-depth overview of the API methods is available in the documentation for [v8 (stable)](https://fakerjs.dev/api/) and [v8.\* (next)](https://next.fakerjs.dev/api/). ### Templates Faker contains a generator method `faker.helpers.fake` for combining faker API methods using a mustache string format. ```ts console.log( faker.helpers.fake( 'Hello {{person.prefix}} {{person.lastName}}, how are you today?' ) ); ``` ## 🌏 Localization Faker has support for multiple locales. The main `faker` instance uses the English locale. But you can also import instances using other locales. ```ts // ESM import { fakerDE as faker } from '@faker-js/faker'; // CJS const { fakerDE: faker } = require('@faker-js/faker'); ``` See our documentation for a list of [provided languages](https://fakerjs.dev/guide/localization.html#available-locales). Please note: Not every locale provides data for every module. In our pre-made faker instances, we fall back to English in such a case as this is the most complete and most commonly used language. If you don't want that or prefer a different fallback, you can also build your own instances. ```ts import { de, de_CH, Faker } from '@faker-js/faker'; export const faker = new Faker({ locale: [de_CH, de], }); ``` ## ⚙️ Setting a randomness seed If you want consistent results, you can set your own seed: ```ts faker.seed(123); const firstRandom = faker.number.int(); // Setting the seed again resets the sequence. faker.seed(123); const secondRandom = faker.number.int(); console.log(firstRandom === secondRandom); ``` ## 🤝 Sponsors Faker is an MIT-licensed open source project with its ongoing development made possible entirely by the support of these awesome backers ### Sponsors ![](https://opencollective.com/fakerjs/organizations.svg) ### Backers ![](https://opencollective.com/fakerjs/individuals.svg) ## ✨ Contributing Please make sure to read the [Contributing Guide](https://github.com/faker-js/faker/blob/next/CONTRIBUTING.md) before making a pull request. ## 📘 Credits Thanks to all the people who already contributed to Faker! The [fakerjs.dev](https://fakerjs.dev) website is kindly hosted by the Netlify Team. Also the search functionality is powered by [algolia](https://www.algolia.com). ## 📝 Changelog Detailed changes for each release are documented in the [release notes](https://github.com/faker-js/faker/blob/next/CHANGELOG.md). ## 📜 What happened to the original faker.js? Read the [team update](https://fakerjs.dev/update.html) (January 14th, 2022). ## 🔑 License [MIT](https://github.com/faker-js/faker/blob/next/LICENSE)