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CALCULATION DESK
Use the browser Web Crypto API to generate unbiased random integers in a [min, max] range, with optional duplicate suppression and a configurable count.
WHAT THIS DOES
Runs entirely in your browser.
/tools/random-number-generatorrandom-numberv4.0.0LOCAL · LOCAL RUNIMPLEMENTED — This workbench is functional in the current release.Presets for this workbench
No preset yet. A preset stores the values in this form — never the result — and only for workbenches that run entirely in your browser.
Collections
Saved on this device only. Turn on sync to carry them to another device.
METHOD / LOCAL RUN
crypto.getRandomValues into a Uint32Array; reject-sample to avoid modulo bias.
Boundary: Integers only. Duplicate suppression means the count is bounded by (max − min + 1).
The calculation or transformation runs in your browser using the values entered above. No input is sent to UtilityForge for this tool.
EXAMPLES / LOCAL RUN FIXTURES
FAQ
No. The random number generator runs locally.
The workbench states the exact method behind every result — the formula or procedure this page runs — so you can verify the computation instead of trusting a black box.
No. This workbench runs in the page: Min, Max, Count (1–100), Unique only are read by the code your browser already downloaded, and UtilityForge receives neither the values nor the result.
Integers only. Duplicate suppression means the count is bounded by (max − min + 1).
RELATED TOOLS
LOCAL — Runs entirely in your browser.
COMMON USE CASES / SOURCE NOTE
Last reviewed:
Source information: Local browser Web Crypto random; no PRNG seed, no remote call.