Random Generator: Number, Name, Dice & Coin

A random generator gives you an unpredictable result at the click of a button. This one has four modes: Random Number, Coin Flip (heads or tails), Dice, and “Names & Lists.” Choose a mode above, adjust its settings, and click the big button. You'll see how each result was calculated—for example, the individual dice rolls—and find it in your history. The tool is free, runs in your browser, and requires no sign-up.

Select “Random Number,” choose the “1 to 100” preset or enter 1 under “From” and 100 under “To,” then click “Draw number.” Both endpoints are included, and each of the 100 numbers has the same 1 percent chance. You can also choose “1 to 10” or “1 to 1000,” or enter your own endpoints, including a small range like 1 to 2 or a negative range like -50 to 50. With “How many numbers?” you can draw up to 1000 at once; “No duplicate numbers” ensures each appears at most once.

Open the “Names & Lists” tab, enter one item per line, choose how many to draw, and click “Select.” You can draw up to 100 entries per click. With “Draw each entry at most once,” you'll get distinct entries—for example, three winners from 20 names. Draw every entry to get a random order, such as who goes first. A name listed twice has twice the chance of being picked. You can enter up to 1000 items, and your list stays in your browser's storage. The generator only draws from your list; it doesn't invent new names.

Yes. Each flip is independent and has exactly a 50 percent chance of heads or tails, even after five heads in a row. Results can vary considerably over a small number of flips, though: exactly 5 heads and 5 tails occurs in only 252 out of 1024 sequences of 10 flips, or about 24.6 percent. The statistics below the coin flip show proportions and streaks from your recent flips. For a yes-or-no decision, decide beforehand that heads means yes.

Open the “Dice” tab, choose the d6, and click “Roll.” The result appears immediately and is added to your history. Use “Number of dice” to roll several at once, such as two d6 for board games or five for dice games like Yahtzee; the total is calculated too. Other dice, including d4, d8, d10, d12, and d20, are one click away, with presets up to d100.

The number before “d” is the number of dice; the number after it is the number of sides. You can also add an optional modifier. 2d6+3 means roll two six-sided dice and add 3: rolls of 4 and 5 total 12. “W” also works instead of “d” (2W6). You can combine groups (1d8+1d4-2); “kh3” keeps the 3 highest dice (4d6kh3), while “kl1” keeps the lowest. Up to 100 dice with up to 1000 sides and 10 groups are allowed.

With advantage, you roll the d20 twice and take the higher result; with disadvantage, you take the lower one. For example, with d20+5 and rolls of 7 and 15, advantage uses the 15 for a total of 20, while disadvantage uses the 7 for a total of 12. A d20 averages 10.5, or 13.8 with advantage and 7.2 with disadvantage. In the Dice tab, select a single die such as d20+5 and enable “Advantage” or “Disadvantage.”

For numbers, click the “6 from 49 Lottery” preset. It sets From to 1, To to 49, the number of draws to 6, “No duplicate numbers,” and ascending order. There are 13,983,816 possible combinations, all equally likely. For other formats, set the range and number of draws yourself and enable “No duplicate numbers.” For Eurojackpot, for example, draw 5 numbers from 1 to 50, then 2 numbers from 1 to 12. The generator won't improve your chances of winning, isn't an official draw, and doesn't provide predictions.

The tool uses your browser’s cryptographically secure random source (Web Crypto) instead of Math.random(). It also avoids modulo bias: dividing 4.294.967.296 possible random values by 6 leaves a remainder of 4, making sides 1 through 4 slightly more likely. The tool discards those 4 values and draws again, giving every side exactly the same probability. This is pseudorandom rather than physically random, but it is more than sufficient for games and draws among friends.

Not on our servers: all results are generated in your browser. Your history exists only in the open tab and disappears when you reload. Only your “Names & Lists” list is saved in your browser's local storage; “Clear list” deletes it. “Copy link with these settings” shares only the settings, such as the Dice tab with 2d6+3. Results and your list are deliberately excluded from the link so nobody can falsify a result afterward. To share a result, use “Copy.”