Random number generator
Generate random numbers between any range. Single numbers, multiple numbers, no repeats.
A short history of random numbers
Generating fair random numbers is an old problem. Dice carved from bone were used for games and divination over 4,000 years ago, and lotteries funded public works from the Han dynasty's Great Wall to the early American colonies. The modern era began in 1955 when the RAND Corporation published A Million Random Digits — an entire book of random numbers that scientists used for statistical sampling before computers made generation instant. Today's computers produce randomness either with fast mathematical formulas (pseudo-random) or by drawing on unpredictable physical sources (cryptographically secure), which is what this tool uses.
Cryptographically secure randomness
TextlyPop uses the Web Crypto API's crypto.getRandomValues() function when available in your browser. This provides cryptographically secure random numbers — significantly more unpredictable than the standard Math.random() used by most online tools. Cryptographic randomness means the numbers cannot be predicted even if you know the previous results. This matters for any use case where true fairness is important, such as lotteries, giveaways, or statistical sampling.
Common uses for random number generation
Teachers use random number generators to call on students fairly, assign seats, or create randomized quizzes. Developers use them to test applications with random data inputs. Game players roll virtual dice for board games, tabletop RPGs, and decision making. Researchers and statisticians use random sampling to select participants from a population. Contest organizers pick winners fairly from a numbered list of entries. Anyone who needs to make a fair unbiased decision between numbered options benefits from a random number generator.
Dice rolling with this tool
Each standard dice type has a quick preset button. Click d6 and Generate for a standard six-sided die. Click d20 for a twenty-sided die used in tabletop RPGs. Set Count to match the number of dice you want to roll simultaneously — set Count to 3 and click d6 to roll 3d6. Enable Show sum to see the total roll value, which is how most dice games work. Enable No repeats when you need each die value to be different.
Frequently asked questions
How do I generate a random number between 1 and 10?
Click the "1 – 10" preset button and then Generate, or type 1 into the minimum field and 10 into the maximum field yourself. Both ends of the range are inclusive, so 1 and 10 are just as likely as any number between them. Every click of Generate produces a fresh, independent draw — previous results have no influence on the next one, exactly like rolling a fair ten-sided die.
Can I generate multiple random numbers at once?
Yes. Set the Count field to anything up to 1,000 and one click produces the whole batch. Combine it with Sort results to get them in ascending order, or Show sum to total them automatically. Batch generation is useful for assigning raffle entries, sampling rows from a spreadsheet, seeding test data, or splitting a class into random groups in one step.
Is this random number generator truly random?
It is as close as software gets. The tool uses the Web Crypto API's crypto.getRandomValues(), which draws on your operating system's entropy pool — unpredictable physical signals like timing jitter — rather than a mathematical formula. Unlike the Math.random() function most online generators rely on, the output cannot be predicted from earlier results, which makes it fair enough for giveaways, draws and statistical sampling.
Can I use this to simulate dice rolls?
Yes. The preset buttons cover the standard dice set used in board games and tabletop RPGs — d6 for a regular die, d20 for the classic Dungeons & Dragons roll, plus d4, d8, d10, d12 and d100. To roll several dice at once, set Count to the number of dice: Count 3 with the d6 preset rolls 3d6, and enabling Show sum gives the total exactly as most game rules expect.
Can I generate random numbers without repetition?
Yes. Enable the No repeats option and each number in your range can appear only once — like drawing numbered balls from a bag without putting them back. This is what you want for lottery-style draws, assigning unique door-prize numbers, or building a shuffled sequence. Note that Count cannot exceed the size of the range in this mode: you cannot draw 20 unique numbers from a range of 10.