Random Number Generator

Overview

• Generates multiple random numbers matching specified conditions: minimum, maximum, and count.
• Supports switching between integers and decimals, allowing or disallowing duplicates, and switching between standard randomness (Math.random) and cryptographically secure randomness (Web Crypto API).
• Useful for a wide range of purposes, from lotteries that require unpredictability to everyday uses like generating test data.

Usage

1. Enter the minimum value, maximum value, and count.
2. Choose whether to generate integers or decimals, whether to allow duplicates, and whether to use cryptographic randomness.
3. Click the "Generate" button to display a list of random numbers matching the conditions.

Example

Min: 1, Max: 10, Count: 5, Integers only

3
7
1
9
5

Use Cases

• Fairly generating winning numbers for a lottery or drawing using cryptographic randomness
• Generating dummy numeric values (age, price, score, etc.) for test data within a specified range
• Generating random numbers for a game or simulation, with duplicates allowed or disallowed

FAQ

Notes

• Enable "Use cryptographic randomness" for uses that require unpredictability, such as lotteries or token generation. It's fine to leave it off for everyday uses.
• In integer mode without duplicates, you cannot generate more values than the number of integers in the specified range — doing so results in an error.
• The generated result exists only on the page and is lost on reload, so copy and save it if you need to keep it.