Random Number Generator
Generates deterministic random samples for developers, testers, and data scientists with configurable range, type, and distribution to support robust testing and prototyping.
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Worked Example & Common Values
Below is a sample worked calculation demonstrating how Random Number Generator processes input data instantly inside your browser.
Options list: ["Emma", "Liam", "Noah", "Olivia", "Sophia"]
Selected: Liam (Verifiably random selection)
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About This Tool
Under the hood, a seeded pseudo-random number generator initializes the sequence. Uniform values are mapped to [min, max], while Normal values center around the midpoint with a spread defined by the range and are clipped to bounds. For strings, characters are sampled from the provided alphabet to the requested length.
Target users include developers, QA engineers, and data scientists who need repeatable test data, synthetic datasets, or stochastic inputs for simulations. The tool’s unique value lies in explicit seed control for reproducibility, multiple distribution options, and optional non-duplicate output when required.
Core features include: seed input, distribution selection, numeric or string output, precision control, and optional uniqueness. Common use cases include unit tests with fixed datasets, performance benchmarks with repeatable inputs, and prototyping where external data isn't available. Outputs are provided as a structured list with seed reference and formatting rules suitable for downstream processing.
How to Use
- Provide inputs: min_value, max_value, count, data_type, distribution_type.
- Optional settings: set seed, precision, allow_duplicates, and alphabet for strings.
- Run generation: execute the calculation to produce the sample set.
- Review outputs: inspect the resulting array and summary metadata (seed_used, distribution_used).
- Export data: copy to clipboard or download in JSON/CSV for integration.
Frequently Asked Questions
Find Quick Answers
What inputs are required to generate values?
Can results be deterministic with a given seed?
What distributions are supported?
What formatting options exist for outputs?
Need to run multiple calculations?
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