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Faker.js

Faker.js is a JavaScript tool for generating fake but realistic data for testing and development.

Place
#13 of 28
Score
6.0
Faker.js's website

What Faker.js is

Faker.js is a JavaScript tool for generating fake but realistic data for testing and development. Its modules provide person, location, date, finance, commerce, and other data types, useful for unit or performance testing, demos, and work before a backend is complete. It includes pre-built instances for more than 70 locales and lets users create custom locales. Setting a seed can make output repeatable, although results for the same seed may change between Faker versions. The JavaScript implementation runs in browsers and Node.js; Faker v10 requires Node.js 20 or above. Installation guidance covers npm, pnpm, yarn, and Deno, and framework examples include Vitest, Jest, Cypress, and Playwright. Faker is free under the MIT License for commercial and non-commercial use and supports self-hosted deployment. The full package is over 5 MiB minified, and the guide advises against deploying it whole in a web app. Locale coverage varies: some locales have limited coverage and may fall back to English, while some locale and method combinations have no applicable data.

Good

  • Modules cover people, locations, dates, and finance
  • Pre-built instances cover more than 70 locales
  • Supports custom locales and seeded output
  • Free under MIT for commercial and non-commercial use
  • Examples cover Vitest, Jest, Cypress, and Playwright

Watch out

  • Faker v10 requires Node.js 20 or above
  • Full package exceeds 5 MiB minified
  • Some locales have limited or fallback coverage
  • Same seed can vary between Faker versions

Who it suits

Faker.js suits developers who need generated data for tests, demos, or work without a completed backend. It is for JavaScript environments in browsers or Node.js, with Faker v10 requiring Node.js 20 or above.

Verdict

Faker.js offers broad data-generation modules and locale options for development and testing. Check its runtime requirement, package size, and locale coverage before using it in a project.

Plans and prices

From Faker.js's own pricing page, checked 7 Oct 2026.

All about pricing
PlanPriceWhat it gives you
FakerFreeMIT licensed · commercial and non-commercial use

The facts

Each one read from Faker.js's own pages, with the date it was checked.

What it does

Data types
Faker can generate person, location, date, finance, commerce, and other data through its modules.checked 7 Oct 2026
Deterministic output
Users can set a seed to repeat generated values, though results for the same seed may change between Faker versions.checked 7 Oct 2026
Installation
The guide documents installation through npm, pnpm, yarn, and Deno.checked 7 Oct 2026
Integrations
The framework guide provides examples for Vitest, Jest, Cypress, and Playwright.checked 7 Oct 2026
Limited locales
Some locales have limited coverage and may rely on English fallback data; some locale and method combinations have no applicable data.checked 7 Oct 2026
Localization
Faker provides pre-built instances for more than 70 locales and lets users build custom locales.checked 7 Oct 2026
Package size
The full Faker package is over 5 MiB minified, and the guide advises against deploying it whole in a web app.checked 7 Oct 2026
Purpose
Faker generates fake but realistic data for testing and development.checked 7 Oct 2026
Runtime
The JavaScript implementation runs in browsers and Node.js, and Faker v10 requires Node.js 20 or above.checked 7 Oct 2026
Security and compliance
The opened official pages state that Faker is released under the MIT License and do not list security certifications or compliance claims.checked 7 Oct 2026
Support
The project directs users with questions to its Discord community and GitHub Discussions.checked 7 Oct 2026
Use cases
The guide lists unit testing, performance testing, building demos, and working without a completed backend as use cases.checked 7 Oct 2026

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