What is the random number generator?
This random number generator picks whole numbers from 1 up to any maximum you choose. It is handy for draws, games and quick sampling.
For a visual version, use the number wheel 1-100.
How to use the random number generator
Set How many numbers you need (1–20).
Set the maximum. Numbers are drawn from 1 to that value.
Press Generate.
Read the results, and check the history line for previous draws.
When to use a random number generator
A random number generator (RNG) gives you an unbiased whole number from a range you choose. Unlike a wheel, it works for huge ranges. Picking from 1 to 1,000,000 would need a million slices, but here it's instant.
Each number comes from your browser's cryptographic random source. Requesting several numbers gives independent draws, so repeats are possible, just as rolling a die twice can give the same face. If you need unique numbers, use the number wheel with Elimination on, or the bingo caller.
RNGs are useful for raffles where tickets are numbered, for choosing random survey rows, for games and for classroom exercises. Results appear immediately, and recent draws are listed underneath.
Random numbers in everyday life
Random numbers sit behind many everyday activities. Raffles with numbered tickets, choosing a random page to read, selecting a question from a numbered bank, or picking a winner by seat number all start with an unbiased number in a range. A quick generator saves pulling numbers from a hat.
For surveys and quality checks, random sampling is a cornerstone of fair analysis. Instead of reviewing the first ten responses, generate ten random row numbers from the total and review those. That avoids the bias of always looking at the earliest or latest entries.
In games, random numbers decide events, hidden values and turn order. A classic classroom game is guess-the-number: the generator picks a value from 1 to 100 and students narrow it down with higher or lower hints, practising place value and logical thinking.
Choosing ranges and avoiding bias
Define your range before you draw. If tickets run from 1 to 250, set the maximum to 250, not a round number above it, or some draws will land on tickets that don't exist. If you need a range that doesn't start at 1, such as 50 to 100, draw from 1 to 51 and add 49 to the result.
Don't redraw because you dislike a number. That quietly introduces bias. Record each draw, especially for prizes, and if you need several unique numbers, use the number wheel with Elimination or the bingo caller so duplicates can't happen.
For transparent prize draws, share the range, the number of draws and the results publicly. Screen-recording the draw adds another layer of trust.
When in doubt, write down the range, the number of draws and the results in one place. That small record answers almost every question participants might raise afterwards.
Key terms explained
Uniform distribution
Every number in the range is equally likely.
Independent draws
Each draw is unaffected by earlier ones, so repeats are possible.
Sampling without replacement
Drawing so the same number can't appear twice, as with bingo.
Seed
A starting value for pseudo-random generators. Cryptographic sources avoid predictable seeds.
Range
The lowest and highest values a draw can produce, set before any number is drawn.
Draw record
A written log of each number drawn, useful for prize draws.
Practical examples
Pick a raffle ticket between 1 and 500. Choose a random page in a textbook for a reading task. Generate six unique numbers from 1 to 49 for a game. Select a random sample of survey responses to review by hand. Roll a custom-sided die for a tabletop game. Assign random IDs to participants in a classroom experiment. For lotteries or anything with money involved, check local rules before using any online generator.
Random Number Generator features
Any range
From 1–2 to 1–millions.
Several numbers at once
Up to 20 per draw.
Cryptographic randomness
Unpredictable and unbiased.
History
See previous draws.
Instant
No delay, even for huge ranges.
Private
Nothing is uploaded.
Popular uses
Numbered raffles
Pick a winning ticket number.
Sampling
Choose random rows from a spreadsheet.
Games
Guess-the-number and random events.
Lessons
Random maths questions.
Tips and best practices
- For unique numbers, use the number wheel with Elimination.
- Write down the range before drawing for transparency.
- For a visible draw, use the wheel instead.
- Use the dice roller for game dice.
- For bingo, use the dedicated caller.
- Repeat draws are normal and expected.
Related tools: number wheel 1-100, bingo number generator, dice roller, raffle picker, or go back to the main spin the wheel page.
Random Number Generator FAQs
What range can I use?
From 1 up to any maximum.
Can I get several numbers at once?
Yes, up to 20.
Is it fair?
Yes. It uses crypto randomness.
Can numbers repeat?
Yes. Each draw is independent. Use the number wheel with Elimination for unique results.
What's the largest range?
Any positive whole number your browser can handle.
Can I start from a number other than 1?
Draw 1–(max−min+1), then add (min−1) to the result.
Is it truly random?
It uses crypto.getRandomValues().
Can I generate decimals?
This tool gives whole numbers.
How is it different from the dice roller?
It's the same method, just labelled for ranges and draws.
Can I use it for a lottery?
Use it for fun or private draws only, and follow local laws.
Does it work offline?
Yes, after loading.
Can I use it to sample rows from a spreadsheet?
Yes. Set the maximum to your row count and draw the number of samples you need.
What's a good classroom game with random numbers?
Guess the number: pick 1–100 and give higher or lower hints.
Can I pick a random number between 1 and 10?
Yes. Set the maximum to 10.
How do I avoid repeated numbers?
Use the number wheel with Elimination, or the bingo caller.
Can I draw lottery-style numbers?
You can draw several numbers at once, but use it only for fun or private draws.
Is the result shown instantly?
Yes, numbers appear immediately after pressing Generate.
Is the random number generator free?
Yes. It's free, needs no sign-up and runs entirely in your browser.