What is this?
Faker is a JavaScript/TypeScript library that generates massive amounts of fake but realistic data — names, addresses, dates, finance records — for testing and development, in the browser and Node.js.
Faker is a JavaScript/TypeScript library that generates massive amounts of fake but realistic data — names, addresses, dates, finance records — for testing and development, in the browser and Node.js.Is it a library I import into my own code, or an online service?A library: you install it from npm and call its generator methods directly in your JavaScript or TypeScript code. There is also a StackBlitz playground if you want to try it without installing anything.
A library: you install it from npm and call its generator methods directly in your JavaScript or TypeScript code. There is also a StackBlitz playground if you want to try it without installing anything.How do I add it to a project?Install the @faker-js/faker package from npm (usually as a dev dependency) and import the faker instance. Docs live on fakerjs.dev; v10 is the stable release and v11 is next.
Install the @faker-js/faker package from npm (usually as a dev dependency) and import the faker instance. Docs live on fakerjs.dev; v10 is the stable release and v11 is next.Does my environment need anything specific to run it?Node.js ^22.13.0, ^23.5.0 or >=24 with npm 10 or newer. The package ships with zero runtime dependencies, so it adds nothing else to your dependency tree.
Node.js ^22.13.0, ^23.5.0 or >=24 with npm 10 or newer. The package ships with zero runtime dependencies, so it adds nothing else to your dependency tree.Is the data it generates guaranteed to be obviously fake?No — Faker intentionally produces realistic-looking data, so generated names, addresses, emails and phone numbers might coincidentally belong to real people. The README warns not to send them messages or calls from your test setup.
No — Faker intentionally produces realistic-looking data, so generated names, addresses, emails and phone numbers might coincidentally belong to real people. The README warns not to send them messages or calls from your test setup.Can I use it in commercial projects for free?Yes — Faker is MIT-licensed open source, with ongoing development funded by sponsors and backers.
Yes — Faker is MIT-licensed open source, with ongoing development funded by sponsors and backers.What kinds of data can it generate?Person data (names, genders, bios, job titles), locations (addresses, zip codes, street names, states, countries), dates (past, present, future, recent, soon), finance (account details, transactions, crypto addresses), commerce (prices, product names, adjectives, descriptions), joke 'hacker' phrases, plus random numbers and strings.
Person data (names, genders, bios, job titles), locations (addresses, zip codes, street names, states, countries), dates (past, present, future, recent, soon), finance (account details, transactions, crypto addresses), commerce (prices, product names, adjectives, descriptions), joke 'hacker' phrases, plus random numbers and strings.Can it generate data in other languages?Yes — over 70 locales. The main instance uses English; you import a locale-specific instance for other languages. Not every locale covers every module, and pre-made instances fall back to English where data is missing, but you can build your own instances with a different fallback.
Yes — over 70 locales. The main instance uses English; you import a locale-specific instance for other languages. Not every locale covers every module, and pre-made instances fall back to English where data is missing, but you can build your own instances with a different fallback.Can I get the same 'random' data on every run?Yes — set your own randomness seed and results become consistent and reproducible. The README notes there are additional considerations when seeding faker.date methods.
Yes — set your own randomness seed and results become consistent and reproducible. The README notes there are additional considerations when seeding faker.date methods.What happened to the original faker.js?The README points to a team update from January 14th, 2022 explaining it. The project now continues under the faker-js organization, with docs, release notes and a changelog on fakerjs.dev.
The README points to a team update from January 14th, 2022 explaining it. The project now continues under the faker-js organization, with docs, release notes and a changelog on fakerjs.dev.What are similar projects?faker, faker, msw, json-server, luxon, nock, big-list-of-naughty-strings, ua-parser-js
faker, faker, msw, json-server, luxon, nock, big-list-of-naughty-strings, ua-parser-js