Random Number Generator
Generate random numbers in any range — multiple at once, no-repeat, decimals, negatives, Gaussian, dice notation, and binary/octal/hex output.
A random number generator that does more than pick one number
This generator produces fresh random numbers on demand and gives you control over exactly what "random" means for your task. Set a minimum and maximum, choose how many numbers you want, and decide whether repeats are allowed — then generate. It is built for everything from lottery picks and raffle draws to test data, classroom demos, and tabletop games.
True vs. pseudo-random
Like virtually every software RNG, this tool produces pseudo-random numbers: a deterministic algorithm seeded by your browser yields a sequence that is statistically indistinguishable from chance for everyday use — games, picks, sampling, and simulations. True random numbers come from physical entropy (atmospheric noise, radioactive decay) and matter mainly for cryptography. For drawing a raffle winner or rolling dice, pseudo-random is perfectly fair; for generating secret keys, use a dedicated cryptographic tool instead.
Every mode, one widget
- Integer range — any min and max, including negative ranges (e.g. -50 to 50).
- Generate many at once — set a count to pull a whole batch in one click.
- No-repeat / unique — perfect for lotteries and raffles where the same number must not appear twice.
- Decimals / floats — choose how many decimal places you need.
- Binary, octal, and hexadecimal output — get each integer in base 2, 8, or 16, handy for developers and CS students.
- Gaussian / normal — cluster results near the middle of the range in a bell curve instead of a flat distribution.
- Dice notation — type
NdMlike2d6,1d20, or3d6+2and the tool rolls and totals for you.
How to use it
Pick a mode, set your range or notation, choose a count, toggle no-repeat or Gaussian if you need them, and click Generate. Copy the full list with one button — ideal for pasting winners into a spreadsheet or seeding a game.
Who uses a random number generator
Teachers draw numbers to call on students or set surprise quantities for word problems. Streamers and community managers run number-based giveaways live on camera so everyone can see the draw is fair. Developers and QA engineers generate ranges of sample IDs, prices, and test fixtures. Tabletop and board gamers replace lost dice with the NdM mode, and statistics students explore uniform versus Gaussian distributions side by side. Because every result is generated fresh in your browser, nothing is logged or shared.
Generating vs. converting
This tool creates new random numbers. If you instead already have a specific number and want to translate it between decimal, binary, octal, and hex, that is a different job — use the Number Base Converter linked on this page rather than generating a random value.
A random number generator that does more than pick one number
This generator produces fresh random numbers on demand and gives you control over exactly what "random" means for your task. Set a minimum and maximum, choose how many numbers you want, and decide whether repeats are allowed — then generate. It is built for everything from lottery picks and raffle draws to test data, classroom demos, and tabletop games.
True vs. pseudo-random
Like virtually every software RNG, this tool produces pseudo-random numbers: a deterministic algorithm seeded by your browser yields a sequence that is statistically indistinguishable from chance for everyday use — games, picks, sampling, and simulations. True random numbers come from physical entropy (atmospheric noise, radioactive decay) and matter mainly for cryptography. For drawing a raffle winner or rolling dice, pseudo-random is perfectly fair; for generating secret keys, use a dedicated cryptographic tool instead.
Every mode, one widget
- Integer range — any min and max, including negative ranges (e.g. -50 to 50).
- Generate many at once — set a count to pull a whole batch in one click.
- No-repeat / unique — perfect for lotteries and raffles where the same number must not appear twice.
- Decimals / floats — choose how many decimal places you need.
- Binary, octal, and hexadecimal output — get each integer in base 2, 8, or 16, handy for developers and CS students.
- Gaussian / normal — cluster results near the middle of the range in a bell curve instead of a flat distribution.
- Dice notation — type
NdMlike2d6,1d20, or3d6+2and the tool rolls and totals for you.
How to use it
Pick a mode, set your range or notation, choose a count, toggle no-repeat or Gaussian if you need them, and click Generate. Copy the full list with one button — ideal for pasting winners into a spreadsheet or seeding a game.
Who uses a random number generator
Teachers draw numbers to call on students or set surprise quantities for word problems. Streamers and community managers run number-based giveaways live on camera so everyone can see the draw is fair. Developers and QA engineers generate ranges of sample IDs, prices, and test fixtures. Tabletop and board gamers replace lost dice with the NdM mode, and statistics students explore uniform versus Gaussian distributions side by side. Because every result is generated fresh in your browser, nothing is logged or shared.
Generating vs. converting
This tool creates new random numbers. If you instead already have a specific number and want to translate it between decimal, binary, octal, and hex, that is a different job — use the Number Base Converter linked on this page rather than generating a random value.
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Frequently Asked Questions
Common questions about the Random Number Generator
They are high-quality pseudo-random numbers generated in your browser, which are statistically fair for games, raffles, sampling, and simulations. They are not cryptographically secure true-random numbers, so do not use them to generate passwords, keys, or security tokens — use a dedicated cryptographic generator for that.
Switch to the Integers mode, set your range and how many numbers you want, then enable the "No repeats (unique)" option. The tool draws without replacement, so every number in the result is distinct — exactly what you need for lottery numbers or raffle draws. The count must be no larger than the range size.
Yes. In Integers mode, change the "Output base" selector to Binary (2), Octal (8), or Hex (16) and each generated integer is shown in that base. This is useful for developers, computer-science coursework, or generating sample values for color codes and memory addresses.
By default every value in your range is equally likely (a uniform distribution). The Gaussian option instead clusters results near the middle of the range and makes the extremes rarer, following a bell curve. It is handy for generating realistic-looking sample data or demonstrating the normal distribution.
NdM means "roll N dice that each have M sides." For example 2d6 rolls two six-sided dice, 1d20 rolls a single twenty-sided die, and 3d6+2 rolls three six-sided dice and adds 2 to the total. Type the notation into the Dice mode and the tool shows the individual rolls and the sum.
ℹ️ Disclaimer
This tool is provided for informational and educational purposes only. All processing happens entirely in your browser - no data is sent to or stored on our servers. While we strive for accuracy, we make no warranties about the completeness or reliability of results. Use at your own discretion.