# davidbau/seedrandom

seeded random number generator for Javascript

Repository: https://github.com/davidbau/seedrandom
Canonical: https://ross.abutalabs.com/products/seedrandom
Language: JavaScript
License Family: other
Last push: 2024-04-25T08:17:08+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4864, "days_push": 860, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2132, forks 168 (observed 2026-08-28T04:06:17.259535+00:00)

## What it is
A small JavaScript library providing seeded pseudorandom number generators, including an ARC4-based PRNG and fast alternatives like Alea. It can replace Math.random with a deterministic generator or create local seeded PRNG instances, usable as a script, Node.js module, or AMD module.

## Use cases
- generate reproducible random numbers in JavaScript tests
- seed Math.random for deterministic simulations
- create predictable procedural generation in games
- shuffle data deterministically across runs
- add entropy to an explicit seed for better randomness
- use a fast Alea PRNG in performance-sensitive code

## When to choose
- you need reproducible/deterministic randomness in JavaScript
- you want to derandomize code for testing
- you need a lightweight PRNG usable in browser or Node.js

## When to avoid
- you need cryptographically secure randomness for security-sensitive purposes
- you need random numbers in a non-JavaScript environment

## Facets
- artifact type: library
- maturity: maintenance
- function: sdk, developer-tools
- domain: developer-tools, programming-languages
- platform: browser, cross-platform
- tags: prng, seeded-random, javascript, deterministic, alea, arc4, algorithms, nodejs

## Member repositories
- davidbau/seedrandom (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:17.259535+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:52:01.341554+00:00, confidence not recorded.
  - readme: https://github.com/davidbau/seedrandom (fetched 2026-08-28T04:06:17.259535+00:00, sha 8d1eced5ded4)
  - registry_npm: https://registry.npmjs.org/seedrandom (fetched 2026-08-29T10:32:22.706786+00:00, sha bdb0adfda6ad)
- Data as of 2026-08-30T08:39:29.467469+00:00.