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Random Number Generator

Generate one or thousands of random numbers within any range — integers or decimals, unique or repeating.

Last updated: May 30, 2026

Client-Side Processing
Input Data Stays on Device
Instant Local Execution

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What is Random Number Generator?

A random number generator creates values that cannot be predicted, selected uniformly from a given range. This browser-based tool uses JavaScript's `Math.random()` — a cryptographically-seeded pseudo-random number generator — to produce numbers instantly without any server calls.

Common uses range from simple dice rolls and lotteries to statistical sampling, game development, security testing, and data generation for software demos.

How to Use Random Number Generator

1

Set your minimum and maximum values (any integers or decimals).

2

Choose how many numbers to generate (1–10,000).

3

Set decimal places to 0 for whole integers, or 1–10 for floating-point.

4

Toggle "Unique" to prevent repeats (only works with integers in range).

5

Click "Generate" and copy the results.

Common Use Cases

  • Picking lottery numbers or raffle winners.
  • Generating random test data for software development.
  • Statistical sampling and simulation exercises.
  • Classroom activities and homework assignments.

Example Input and Output

Generate 6 unique random integers between 1 and 49 — a classic lottery number set.

Settings
Min: 1, Max: 49, Count: 6, Unique: Yes
Output
7, 14, 23, 31, 38, 45

Data Privacy

All number generation happens in your browser. No data is sent to any server.

Frequently Asked Questions

Are these truly random numbers?
They use a pseudo-random algorithm (Math.random) seeded by system entropy — suitable for most everyday uses like games, sampling, and testing, but not for cryptographic security.
What is the maximum count I can generate?
Up to 10,000 numbers per generation. For bulk datasets, generate multiple times.
Why can't I generate more unique numbers than are in the range?
With unique mode, each number can appear at most once. So if your range is 1–10, you can generate at most 10 unique integers.

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