# Random Number Generator

> Generate random numbers in any range, with optional uniqueness — for draws and sampling.

To generate random numbers, set a minimum, maximum and how many you want. Values are drawn from the browser's cryptographically secure random source rather than Math.random, and the no-repeats option guarantees distinct values for draws and sampling.

**URL:** https://convertto.tech/t/random-number-generator
**Category:** Calculators (https://convertto.tech/c/calculators)
**Privacy:** Runs entirely in the browser; no upload
**Cost:** Free, no sign-up
**Last updated:** 2026-08-01

## Key facts

- **Privacy:** Runs entirely in your browser — nothing is uploaded
- **Cost:** Free, unlimited, no sign-up

## How to use

1. Set the minimum.
2. Set the maximum.
3. Set the how many.
4. Turn "No repeats" on or off as needed.
5. Turn "Sort ascending" on or off as needed.
6. The result appears immediately — copy or download it.

## FAQ

### Is this suitable for a lottery or a giveaway?

It uses the browser's cryptographic random source, so the numbers are unpredictable and uniformly distributed. For anything with legal or financial consequence, a documented and auditable process matters more than the generator itself.

### What is the difference between Math.random and crypto random?

Math.random is fast but predictable — observing a few outputs can reveal the internal state and therefore all future values. Cryptographic randomness draws from the operating system entropy pool and cannot be predicted.

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