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▶ Developer Tools for Random Data Generation // v2.13.1
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Random Integer Generator

Generate random whole numbers (integers) with customizable ranges - perfect for games, simulations, and random selection

Our random integer generator creates cryptographically secure whole numbers within your specified range. Generate unique integers, sorted sequences, or bulk random numbers for games, statistical simulations, lottery draws, and test data. Perfect for developers, mathematicians, and anyone needing truly random whole number selection with uniform distribution and no bias.

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NUMBER GENERATOR →

All-in-one number generator with integers, decimals, primes, and percentages. Generate any type of random number in one place.

$ generate --type=number --subtype=integer
DECIMAL GENERATOR →

Generate floating-point numbers with customizable decimal precision (1-10 places) for scientific calculations and measurements.

$ generate --type=decimal --precision=2

What is a Random Integer?

An integer is a whole number without fractional or decimal components. Integers include positive numbers (1, 2, 3...), negative numbers (-1, -2, -3...), and zero (0). Our random integer generator uses cryptographically secure algorithms to ensure truly unpredictable values with uniform distribution across your specified range.

Integers are fundamental in mathematics and computer science, used for counting, indexing, identification, and discrete calculations where fractional values don't make sense (you can't have 2.5 people or roll 3.7 on a die). This generator ensures every integer in your range has exactly equal probability of selection.

Integer Generator Configuration Options

Range Configuration (Min/Max Values)

Define the boundaries for random integer generation by setting minimum and maximum values (0 to 1,000,000). The generator ensures uniform distribution with cryptographically secure randomness, meaning every integer within the inclusive range [min, max] has equal probability of selection.

Quantity (1-1000 integers)

Generate multiple random integers simultaneously for batch operations, statistical analysis, or bulk data needs. Each integer is independently generated with fresh cryptographic randomness for true unpredictability.

Unique Numbers Option

Ensure all generated integers are unique with no duplicates. This implements sampling without replacement, where each integer can only appear once in the result set. Perfect for lottery numbers, raffle draws, and unique ID generation.

Sorting Options

Organize generated integers in ascending order or preserve random order. Sorting is applied after generation and does not affect randomness quality. Useful for presentations or when order matters.

How to Generate Random Integers

[STEP 1] Set Range

Configure minimum and maximum values to define your integer range (e.g., 1-100 for percentages, 1-6 for dice rolls).

[STEP 2] Set Quantity

Choose how many integers to generate (1-1000). Each number is independently generated with cryptographic randomness.

[STEP 3] Configure Options

Enable unique mode to prevent duplicates for lottery draws, or enable sorted mode to arrange results in ascending order.

[STEP 4] Generate & Export

Click EXECUTE GENERATION to create your random integers. View statistics (sum, average), copy individual numbers or all at once, and export results as TXT, CSV, or JSON for integration into your projects.

Integer Generator Best Practices

  • _ Range Validation - Always ensure minimum value is less than maximum for valid generation.
  • _ Unique Mode Limits - When using unique mode, quantity cannot exceed range size (e.g., can't generate 10 unique integers from range 1-5).
  • _ Zero Handling - Decide if zero should be included in your range based on your use case (percentages often exclude zero).
  • _ Negative Numbers - Use negative ranges for temperature simulations, coordinate systems, or financial calculations involving debt.
  • _ Large Ranges - For ranges exceeding 1 million, consider performance implications and whether you truly need that scope.
  • _ Cryptographic Quality - Suitable for non-security applications like games and simulations; use dedicated cryptographic tools for security keys.

Technical Implementation

Our integer generator employs cryptographically secure random number generation (CSPRNG) with uniform distribution across specified ranges. The system uses rejection sampling when necessary to ensure unbiased selection:

// Random integer generation with uniform distribution
Algorithm: Uniform Integer Generation

N = min + ⌊R × (max - min + 1)⌋
where R ∈ [0,1) is uniformly distributed CSPRNG value

// Example: Generate integer between 1 and 100
N = 1 + ⌊R × 100⌋ → produces integers {1, 2, 3, ..., 100}

// Probability for each integer: P(n) = 1/(max-min+1)

API Access for Developers

Generate random integers programmatically using our free REST API. No authentication required for basic usage.
GET https://generate-random.org/api/v1/generate/numbers?type=integer&min=1&max=100&count=10
VIEW FULL API DOCUMENTATION →

Frequently Asked Questions

Are the integers truly random? ▶
Yes, our generator uses cryptographically secure random number generation (CSPRNG) which produces truly unpredictable integers with uniform distribution. Each integer in your specified range has exactly equal probability of selection, with no patterns or bias.
What's the difference between unique and normal mode? ▶
Normal mode allows duplicate integers (sampling with replacement), where each generation is independent. Unique mode prevents duplicates (sampling without replacement), ensuring each integer appears at most once. Use unique mode for lottery draws or when you need distinct values.
Can I generate negative integers? ▶
Yes, you can set negative minimum and maximum values to generate negative integers. This is useful for temperature simulations, coordinate systems, financial calculations involving debt, or any scenario requiring numbers below zero.
Why does sorting not change the randomness? ▶
Sorting is applied after the random integers are generated, so it doesn't affect the quality of randomness. Each integer is still selected with cryptographic randomness - sorting just reorganizes the final results for easier reading or presentation.
What happens if I request more unique integers than the range allows? ▶
The system will prevent this invalid configuration. For example, you cannot generate 10 unique integers from the range 1-5, as there are only 5 possible values. The quantity in unique mode is automatically limited to the range size (max - min + 1).