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Hazuu Tools

Random Number Generator

Generate random numbers within any range instantly. Set your min, max, and quantity.

Maximum 500 Results

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No numbers generated yet

Set your range and count, then click Generate.
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About Random Number Generator

Random Number Generator produces pseudo-random integers within any numeric range you define. Enter a minimum value, a maximum value, and the quantity you need — from a single number up to 500 at once — then click Generate. The tool uses the formula Math.floor(Math.random() * (max - min + 1)) + min, giving every integer in the range an equal probability of being chosen each time.

This tool suits a wide range of tasks: picking a winner from a numbered list, seeding a dataset for software testing, assigning random IDs during a prototype, setting up a probability experiment, or giving students unique quiz variants. Because you control both the range and the count, you can tailor the output to match the exact constraints of whatever you are building or deciding.

Every number is generated locally in your browser with no network requests. Nothing is logged, stored, or transmitted to any server, so you can use it freely for internal data, academic research, or any sensitive context. There is no account, no subscription, and no daily limit.

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Key Features

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Configurable integer range

Set any whole-number minimum and maximum, including negative values. The tool handles ranges of any width, from a single digit up to billions, without extra configuration.

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Batch generation up to 500

Generate one number or a full batch of up to 500 in a single click. The results appear both as a comma-separated list you can paste directly and as individual numbered cards.

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Copy all or copy one

Grab every number at once with Copy All, or hover over any individual card to copy just that value. Either way the result lands on your clipboard in one click.

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Uniform distribution

Each integer in the defined range has an equal chance of appearing. The uniform distribution makes the output appropriate for fair draws, load balancing tests, and unbiased sampling.

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100% client-side processing

All generation runs in your browser via JavaScript. No data is sent to a server, making it safe for sensitive or internal use cases without any sign-in or setup.

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Instant and repeatable

Click Generate as many times as you like to produce a fresh batch. Each run is independent, so you can keep drawing new sets until you have exactly what you need.

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How to Use

01

Set Your Range

Enter a minimum and maximum value to define the range for your random numbers.

02

Choose Quantity

Specify how many random numbers you want to generate (1 to 500).

03

Generate & Copy

Click Generate to create your numbers, then copy individual results or all at once.

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Example

Set Min to 1, Max to 50, and Count to 5. The tool generates five independent random integers in that range, displayed both as a comma-separated list and as individual numbered cards.

Settings
Min: 1
Max: 50
Count: 5
Generated numbers
17, 3, 42, 29, 8

1. 17
2. 3
3. 42
4. 29
5. 8
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Common Use Cases

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    Picking a random winner or participant

    Assign each participant a number, set the range to match, and generate one result. Unlike a lottery-number generator — which produces a fixed set of non-repeating draws for a specific game format — this tool gives you a single unrestricted integer from any range you choose.

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    Generating test data and sample datasets

    Populate database columns, mock API responses, or seed randomized arrays for unit tests. Generating 100 or 500 values at once means you can fill a spreadsheet column or JSON fixture in seconds rather than writing a script.

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    Classroom probability experiments

    Run repeated trials of a dice roll (range 1-6), coin flip (0-1), or custom experiment to build frequency tables. Students can see the law of large numbers in action directly in the browser without installing software.

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    Assigning random integer IDs during prototyping

    When building a prototype, quickly generate a batch of unique-looking numeric IDs to stand in for real database keys. This avoids conflicts with sequential IDs and gives mock data a realistic appearance.

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    Game development and tabletop gaming

    Simulate any die roll or stat roll on the fly. Set the range to match the die (1-4, 1-6, 1-8, 1-12, 1-20, or 1-100 for a percentile roll) and generate one value per roll without needing physical dice.

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Frequently Asked Questions

What is a Random Number Generator? expand_more
A Random Number Generator (RNG) is a tool that produces integers selected at random from a range you specify. This tool uses the formula Math.floor(Math.random() * (max - min + 1)) + min so every integer in the range has an equal probability of appearing. It is useful for games, simulations, statistical sampling, and everyday decision-making.
Can I generate negative numbers? expand_more
Yes. Enter any integer — positive or negative — for both the minimum and maximum fields. For example, setting the range from -50 to 50 will generate random integers anywhere across that span, including zero.
Are the generated numbers truly random? expand_more
The numbers are pseudo-random, produced by the browser's built-in Math.random() algorithm. They are not suitable for cryptographic key generation, but they are statistically uniform and fully adequate for games, simulations, statistical sampling, testing, and general-purpose randomization.
Is there a limit on how many numbers I can generate? expand_more
You can generate up to 500 random numbers in a single batch. If you need more than 500, click Generate again to produce a fresh independent set. There is no daily cap or rate limit.
How is this different from the Lottery Number Generator? expand_more
The Lottery Number Generator creates a fixed-size set of non-repeating numbers drawn from a specific pool — modelling the rules of a real lottery draw. This Random Number Generator has no such constraint: numbers can repeat, you control the range freely, and you can request any quantity from 1 to 500. Use this tool when you need unrestricted integer randomness rather than a lottery-style unique draw.
How is this different from the UUID Generator? expand_more
A UUID is a 128-bit universally unique identifier formatted as a hexadecimal string, designed to avoid collisions across distributed systems. This tool generates plain integers within a range you define, which is what you need for dice rolls, sampling, or numeric IDs — not globally unique opaque tokens.
Is my data safe when using this tool? expand_more
Yes. All generation runs locally in your browser. No input, output, or settings are sent to any server, so the tool is safe for sensitive or internal use without an account.
Can I use the output in a spreadsheet or script? expand_more
Yes. The Copy All button places all generated numbers on your clipboard as a comma-separated list, which you can paste directly into a spreadsheet cell range, a JavaScript array literal, a Python list, or any other comma-delimited context.