Random Number Generator

Generate random integers, decimals, and number sequences with custom ranges and options.

Single Number
Multiple Numbers
Decimal Numbers
Number Sequence
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History:
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How to Use the Random Number Generator

1. Choose a generator type from the tabs at the top:

  • Single Number: Generate one random integer at a time
  • Multiple Numbers: Generate multiple random integers at once
  • Decimal Numbers: Generate random numbers with decimal places
  • Number Sequence: Generate a shuffled sequence or random sample from a range

2. Set your parameters based on the generator type:

  • Minimum/Maximum Values: Define the range for your random numbers
  • Number of Results: Specify how many random numbers to generate
  • Decimal Places: Set precision for decimal numbers
  • Unique Numbers: Choose whether to allow duplicates
  • Sorting Options: Arrange results in ascending or descending order

3. Click the generate button to create your random numbers.

4. View your results in the results section below.

5. Copy results to your clipboard using the "Copy Results" button.

6. Clear results when you want to start fresh.

Frequently Asked Questions

How random are these numbers?

Our random number generator uses a cryptographically secure pseudorandom number generator (CSPRNG) provided by your browser. This ensures high-quality randomness suitable for most applications. However, for cryptographic purposes or applications requiring true randomness, specialized hardware random number generators are recommended.

What's the difference between "Random Shuffle" and "Random Sample"?

Random Shuffle takes all numbers in the specified range and randomly reorders them. This is like shuffling a deck of cards - all numbers from the range will appear exactly once in the result. Random Sample selects a specified number of items randomly from the range without replacement, meaning each number can appear at most once in the result.

What are some common uses for random numbers?

Random numbers have many practical applications:

  • Games and lotteries (dice rolls, card shuffling, winner selection)
  • Statistical sampling and research
  • Simulation and modeling
  • Randomized algorithms
  • Cryptography and security
  • Random selection for decision making
  • Educational activities and classroom exercises

Is there a limit to the range of numbers I can generate?

The tool supports integers within the JavaScript safe integer range (approximately ±9 quadrillion or ±9,007,199,254,740,991). For decimal numbers, the range is approximately ±1.7976931348623157 × 10^308 with up to 16 decimal places of precision. However, for very large ranges or large quantities of numbers, the generation process may take longer.

Can I generate unique numbers larger than the range?

No, when generating unique numbers (no duplicates), the number of results cannot exceed the size of the range. For example, if your range is 1-10, you cannot generate more than 10 unique numbers. The tool will automatically limit the number of results or display an error message in such cases.

Why would I need to exclude previously generated numbers?

Excluding previously generated numbers is useful in scenarios where you want to ensure fairness or complete coverage over multiple generations. For example, in a lottery or raffle where each number should only be drawn once, or when randomly assigning tasks to ensure everyone gets a different task each time.

Is my data secure?

Yes, all random number generation happens directly in your browser. No data is sent to our servers, ensuring complete privacy and security.