Random tools

The 5 tools in this category cover three distinct kinds of operation: simulating a simple physical draw (flipping a coin, rolling one or several dice), and picking or reordering results among options you write yourself (picking a random item, shuffling a whole list's order, splitting a group into teams). Picking a random item and shuffling a list aren't the same operation: the first returns a single result from the list, the second returns the entire list reordered.

Coin Flip

Dice Roller

All 5 tools in this category get their randomness from the browser's crypto.getRandomValues() (Web Crypto API), not Math.random(): integers are generated with rejection sampling to avoid modulo bias, and list shuffles use the Fisher-Yates algorithm over that same source. The "cycling" animation you see before the final result settles (in the dice roller, for example) is purely visual: every value shown during that cycle is a real draw, just as valid as the one it ends on, not a fake sequence rigged to land on a prepared value.

In the random item picker and the team randomizer, the text is split by line, whitespace is trimmed, and empty lines are dropped -- but duplicate lines are not removed: if you type the same name twice, it counts as two independent entries in the draw, so it has twice the relative chance of being picked compared to a name that appears only once. Picking a random item is conceptually a draw with replacement over that list of lines (each line is an independent entry); shuffling a list, on the other hand, doesn't pick or discard anything -- it returns exactly the same items, without replacement, just in a different order.

Random Item Picker

List Shuffler

Coin flip has two possible outcomes (heads or tails) with equal probability each; it doesn't reproduce real physical factors like weight or air resistance -- it's a digital simulation of two equally likely states, not an exact replica of a real coin's physical behavior. Dice roller supports different numbers of sides (D4, D6, D8, D10, D12, D20) and several dice at once, adding up the total; every side has the same probability of coming up. The team randomizer first shuffles the full list of participants and then distributes them round-robin across the number of teams you choose: if the participant count isn't a multiple of the team count, the size difference between the largest and smallest team never exceeds one person -- there's no skill or level criterion, the split is purely random.

Team Randomizer

These tools are meant for everyday decisions, games and informal dynamics -- what to eat, who goes first, splitting a group into teams for a game. They aren't intended or verified for regulated draws, real-prize lotteries, betting, or medical, legal or financial decisions: using the browser's cryptographic randomness source here doesn't turn the tool into a legally audited draw mechanism.

All 5 tools in this category process everything in your browser: the list you type, the number of dice sides, or the number of teams is never sent to a server. The result isn't saved between visits either; each draw, roll or shuffle is independent of the previous one.