Generate random numbers within specified ranges
Generate random numbers within specified ranges
This tool produces random numbers in any range you define, entirely in your browser using the browser's random number source. It offers two modes: a single-number generator that instantly displays one large result, and a batch generator that produces up to 1,000 numbers at once. The batch mode includes an important distinction for fair draws: with duplicates allowed, each pick is independent (like repeated dice rolls), while the no-duplicates setting draws without replacement so every number is guaranteed unique, which is exactly what raffles, prize drawings, and lottery-style selections require. Results can optionally be sorted, and a statistics panel summarizes the average, sum, minimum, and maximum.
Practical uses show up everywhere: teachers call on students or assign presentation order, game nights resolve ties and rolls without hunting for dice, developers test sample data, and committees pick winners from entry lists. The quick presets cover the most common cases: a standard die (1 to 6), a coin flip (0 to 1), and the classic 1 to 10 and 1 to 100 ranges. Negative ranges are supported too, which is useful for math exercises and game mechanics. When you need to split people into fair groups after drawing, the Random Team Generator can take it from there, and the Password Generator applies randomness to account security instead.
It uses your browser's built-in random number source and maps the result uniformly across your chosen minimum and maximum, so every number in the range has an equal chance of appearing. All generation happens locally on your device, which keeps it fast and works even if you go offline after the page loads.
When duplicates are allowed, each number is drawn independently, so the same value can appear more than once, just like rolling a die repeatedly. When you turn it off, the tool switches to drawing without replacement from the range, which guarantees every result is unique. That mode is ideal for lottery-style draws, raffle ticket selection, or assigning unique numbers to people.
You can generate up to 1,000 numbers in a single batch. If unique mode is on, your requested count cannot exceed the size of the range itself, since there are only that many distinct values available; the tool will tell you if the combination is impossible.
Yes. The quick presets include a six-sided dice range of 1 to 6 and a coin flip range of 0 to 1, plus 1 to 10 and 1 to 100 for general use. You can also type any custom range you need, including negative numbers, for games, sampling, or classroom activities.
After generating a batch, the tool displays the average, sum, minimum, maximum, and count of your numbers. This is handy for quick sanity checks on classroom exercises, simulations, or verifying that a draw looks reasonably distributed across the range.