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Random Number Generator

Pick one random value or generate a list across a custom numeric range with Web Crypto-backed sampling.

TOOLMERA / GENERATORS
Random Number Generator
Browser-first processing
Bounded values use Web Crypto output with rejection sampling to avoid simple modulo bias. This utility is not a certified lottery or regulated drawing system.
Privacy-mindedBrowser-first whenever possible
Instant workflowNo setup or account required
Free core toolOpen it and get the task done
WHY TOOLMERA

Built to get the task done.

  • Integer & decimal modes
  • Unique values option
  • Cryptographic source
ABOUT THIS TOOL

Free Random Number Generator — Pick Numbers Online

Generate random integers or decimals with custom min and max values, quantity, precision, unique-value and sorting controls.

Integer and decimal generation

Integer mode draws whole numbers between the inclusive minimum and maximum. Decimal mode converts the requested precision into discrete numeric steps and draws from that finite range.

The generator supports up to six decimal places and can return one value or a larger list.

Unique values and sorting

Enable Unique values only when duplicates are not acceptable. Toolmera checks that the requested quantity can fit inside the selected discrete range before generating.

Results can remain in random order or be sorted ascending or descending after generation.

How bounded random values are sampled

Toolmera draws browser Web Crypto values and uses rejection sampling for bounded integer selection instead of a naive modulo operation.

This is a general-purpose utility and is not presented as a certified lottery, gaming or regulated drawing system.

HOW IT WORKS

How to use Random Number Generator

01

Choose the calculation

Open the tool and select the mode or options that match your task.

02

Enter the known values

Provide the inputs required for the result.

03

Review the result

Check the calculation, assumptions and supporting output shown by Toolmera.

KEEP GOING

Related tools

Useful next steps in the same workflow.

FAQ

Common questions

Can I generate unique numbers only?

Yes. Enable Unique values only; the tool validates whether enough distinct values exist in the selected range.

Can the tool generate decimals?

Yes. Decimal mode supports one to six decimal places.

What is the maximum batch size?

The current interface accepts up to 10,000 generated values per run.

Does the tool use Math.random()?

No. The current implementation derives bounded values from the browser Web Crypto API.