chancejs/chancejs

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

6540 stars · 462 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Chance is a minimalist JavaScript library for generating random strings, numbers, names, addresses, dates, and other data, built on a seedable Mersenne Twister for reproducibility. It is primarily used to reduce monotony when writing automated tests or generating mock data.

Use cases

• generate fake user data for tests
• seed random data generator for reproducible tests
• generate random names and addresses in javascript
• mock api response data
• generate random strings and numbers in node
• populate json schema with sample data

When to choose

• you need random test or mock data in JavaScript with optional seeding for repeatability
• you want a lightweight, dependency-free generator covering names, addresses, finance, web, and time data
• you need browser and Node support from a single library

When to avoid

• you need cryptographically secure randomness
• you need locale-specific fake data beyond what Chance provides
• you are not working in JavaScript

Facets

library · maturity maintenance

data-generation sdk developer-tools testing browser cross-platform fake-data random-generator mock-data seeded-random mersenne-twister test-data automation nodejs javascript

Member repositories

For agents

markdown · JSON · MCP: product_card(name="chancejs/chancejs")