38 lines
2.2 KiB
Markdown
38 lines
2.2 KiB
Markdown
# Random Tools
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Generate secure or reproducible random values locally in the browser.
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Random Tools is a standalone local-first application in the [add·ideas Toolbox](https://git.add-ideas.de/lotobo/toolbox-portal). Inputs are processed in the browser and are not uploaded.
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## Current scope
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- Unbiased local WebCrypto integers and strings plus normal-distribution samples
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- Explicitly non-cryptographic, seeded deterministic generation with reproduction metadata
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- Dice expressions, sampling without replacement, Fisher–Yates shuffling and passphrases
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- Exact weighted sampling without replacement from bounded quoted CSV input
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- Versioned executable seeded recipes for integers, strings, equal-weight samples and weighted samples
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- WebCrypto commit–reveal ceremonies with domain-separated commitments, 256-bit private nonces, canonical participant ordering and fail-closed verification
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- UUIDv4, UUIDv7 and random ULID generation
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- Local draws for coin flips, shuffled card deals and unique integer sequences
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- Random calendar dates with weekday and uniqueness controls, exact decimal fractions, and equal-area spherical coordinates
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All functionality runs locally. Secure generation never falls back to the seeded source, and deterministic results/recipes are reproducible but not suitable for secrets. Recipes can embed list values, so review them before sharing. Recipes for custom passphrases identify the normalized list by count and SHA-256 but do not embed it, so reproduction requires the same custom input. A commit–reveal result proves only that the supplied reveals match the supplied commitments; participants must publish every commitment before any reveal through a channel of their choice. The browser CSPRNG is not physical entropy, and no operation is presented as certified for regulated drawings or gambling. See [docs/ARCHITECTURE.md](docs/ARCHITECTURE.md) and [docs/PRIVACY-SECURITY.md](docs/PRIVACY-SECURITY.md).
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## Development
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Requires Node.js 22 and npm 11.
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```sh
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npm ci
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npm run check
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npm run test:browser
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```
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## Release
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`npm run release:artifact` creates a deterministic `release/rand-tools-0.2.0.zip` and checksum sidecar.
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## Licence
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GPL-3.0-or-later. Runtime dependencies retain their own licences; see [THIRD_PARTY_NOTICES.md](THIRD_PARTY_NOTICES.md).
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