Random Number Generator

Enter numbers between

Enter numbers

From number:

To number:

Spin duration: seconds

1 - 4 1 - 10 1 - 20 1 - 30 1 - 50 1 - 100 1 - 500 1 - 1000

What Is a Random Number Generator?

A random number generator (RNG) is a tool — digital or physical — that produces a sequence of numbers that have no predictable pattern. Online random number generators like this one use algorithms seeded by system entropy to produce results that are statistically unbiased and fair.

Unlike rolling a die or picking a card, a digital RNG can work across any range you specify: from 1 to 6 for a dice simulation, 1 to 100 for a classroom lottery, or 1 to 1,000,000 for a large raffle. You can also generate multiple random numbers simultaneously, making it ideal for everything from team assignments to data sampling.

Our tool uses JavaScript's cryptographically secure random API (window.crypto.getRandomValues) to ensure every result is truly unpredictable — The generator uses the Web Crypto API instead of the standard Math.random() function.

How to Use This Random Number Generator

Generating a random number takes three seconds and zero technical knowledge:

Set Your Range

Enter your minimum and maximum values in the From / To fields. The default is 1–100.

Choose Quantity

Need more than one number? Set the quantity field to generate up to 100 unique numbers at once.

Press Generate

Click the Generate button. Your random number appears instantly the result is displayed immediately.

Repeat Freely

Hit the button again for a new result. Every spin is independent — Results can repeat unless duplicate exclusion is enabled.

What Can You Use a Random Number Generator For?

A random number generator can be useful for classroom activities, games, raffles, simulations, sampling and simple decisions. Here are the most common:

🎓

Education

Randomly select students, questions, groups or exercises from a numbered list.

🎰

Raffles & Draws

Select a number from a predefined range for simple prize draws.

🎮

Games

Simulate dice rolls, random events and other game mechanics.

📊

Statistics & Sampling

Generate random values for testing, simulations and simple sampling tasks.

🏆

Sports & Competitions

Randomly assign matchups, positions or playing order.

🍽️

Daily Decisions

Assign numbers to your options and let the generator make a random choice.

Types of Random Number Generators

Not all random number generators work the same way. Here's a breakdown of the main types and when to use each:

Type	How It Works	Best For
Pseudo-RNG (PRNG)	Uses a mathematical algorithm seeded by a starting value. Deterministic but statistically random.	Simulations, games, general use
Cryptographic RNG (CSPRNG)	Uses system entropy (mouse movement, hardware noise) for unpredictable results.	Security, passwords, encryption
True Random (TRNG)	Derives randomness from physical phenomena like atmospheric noise or quantum events.	High-stakes lotteries, scientific research
Weighted RNG	Assigns probability weights to different outcomes so some numbers appear more often.	Game loot systems, probability demos
Range RNG (this tool)	Generates a uniform random integer or set of integers within a user-defined min-max range.	Everyday tasks, raffles, teaching

Popular Random Number Generator Ranges

Here are the most commonly requested random number ranges and what people use them for:

1–10 — Quick decisions, small quizzes, beginner dice games
1–20 — D20 dice rolls in Dungeons & Dragons and other RPGs
1–50 — Mid-size class raffles, numbered seating, bracket draws
1–100 — Most popular range; percentage picks, classroom lotteries, guessing games
1–1000 — Large group raffles, research sampling, stress testing
1–10000 — Token generation, ticket numbering, large-scale events

All of these ranges are available via preset buttons at the top of the tool, or you can type any min/max values you need.

Frequently Asked Questions

What is a random number generator? ▾

A random number generator is a tool that produces a number within a range you specify. For example, you can generate a number between 1 and 100.

How do I generate a random number between 1 and 100? ▾

Enter 1 as the minimum value and 100 as the maximum value, then click Generate. You can also use the 1–100 preset.

Can I generate multiple random numbers? ▾

Yes. You can generate multiple numbers in one request, up to the maximum quantity supported by the tool.

Can random numbers repeat? ▾

Yes, depending on the selected settings. If duplicate values are disabled, the generator will avoid selecting the same value more than once within that request.

Does the generator work on mobile? ▾

Yes. The tool runs in modern web browsers on smartphones, tablets and desktop computers.

How does the generator create random numbers? ▾

The tool uses the Web Crypto API (crypto.getRandomValues()) provided by modern browsers to obtain high-quality random values.