Coin flip, dice roll, random number generator, and more
Random Tools is a free browser-based utility that bundles three common randomizers into one page: a coin flip (heads or tails), a dice roller (standard six-sided dice, with support for rolling multiple dice at once), and a random number generator that returns an integer within a range you define with a minimum and maximum. Everything runs locally in your browser, so results appear instantly with no page reloads or server round-trips.
It is used by teachers picking a student at random, tabletop and board gamers who need a d6 when no physical dice are handy, developers seeding test data, and anyone settling a decision with a fair coin toss. Because the range is configurable, the number generator also works for raffles, giveaway draws, and picking a winner from a numbered list.
All three tools draw from the browser's built-in Math.random() function, which returns a floating-point value in the range [0, 1). To produce a whole number in an inclusive range, the tool applies the standard formula Math.floor(Math.random() * (max - min + 1)) + min. For a coin flip this reduces to a range of 0 to 1 mapped to Tails and Heads; a six-sided die uses a range of 1 to 6.
Each result is statistically independent of the previous one, so a run of three heads in a row does not make tails 'due' next: every flip stays a fair 50/50. Rolling multiple dice simply repeats the single-die draw and sums the faces, which is why totals cluster toward the middle (a total of 7 is far more likely than 2 or 12 with two dice). Math.random() is a pseudo-random generator suitable for games, decisions, and casual draws, but it is not cryptographically secure and should not be used to generate passwords, tokens, or anything requiring security-grade unpredictability.
Yes, it is completely free with no sign-up. All randomization runs locally in your browser using JavaScript, so no results, ranges, or clicks are sent to a server or stored anywhere.
Yes. Each flip has an independent 50% chance of Heads and 50% chance of Tails. Past results have no effect on future ones, so streaks are normal and expected over many flips.
Yes. Set the number of six-sided dice you want and the tool rolls each one separately, then shows the individual faces and their combined total.
You set the minimum and maximum yourself, and both ends are inclusive. For example, a range of 1 to 100 can return any whole number from 1 through 100.
No. It uses the browser's Math.random(), which is fine for games and casual decisions but is not cryptographically secure, so it should not be used for passwords, security tokens, or lottery-grade draws.
No installation is needed; it works in any modern browser. Once the page has loaded, the tools run entirely on your device.
Because each result is independent, repeats are a normal part of true randomness. In a small range like 1 to 6, seeing the same value twice in a row happens fairly often.