One tool for every random roll and flip
Skip the physical dice bag and the arguing over whether a coin landed heads or tails. This single tool rolls any combination of dice and flips any number of coins with one tap, giving you a clean, shareable result in milliseconds. It is built for tabletop nights, classroom demos, and everyday 'who goes first' decisions alike.
Roll dice like a tabletop pro
Go beyond a plain six-sided die. Choose 1 to 12 dice, pick standard shapes (d4, d6, d8, d10, d12, d20, d100), or set a custom side count from 2 to 999. Type standard notation such as 3d6+2, roll with advantage using 2d20kh1, or drop the lowest with 4d6kh3. Exploding dice and success-threshold counting cover everything from indie RPGs to board-game house rules.
Flip coins for fair, instant decisions
Flip a single coin or up to 100 at once. Each flip is animated and the tool keeps a running tally of heads versus tails plus the current streak, so you can settle bets, assign turns, or run a quick A/B split without reaching for loose change. Weighted bias is available when you want an unfair coin for a game.
Private, fast, and statistically fair
Every result comes from a cryptographically secure random number generator (not JavaScript's Math.random), so the distribution is genuinely uniform and unpredictable. All rolling and flipping happens in your browser — nothing is uploaded, logged, or stored on a server — and a built-in history with a frequency histogram lets you review, copy, or export your rolls anytime.
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- Dice and coin modes in one tool — switch instantly
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- Roll 1–12 dice with presets d4, d6, d8, d10, d12, d20, d100
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- One-tap quick rolls: d20, 2d6, 4d6kh3, 2d20kh1 and more
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- Custom dice sides from 2 to 999 for any house rule
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- D&D notation parser: 3d6+2, 2d20kh1 (advantage), 4d6kh3 (drop lowest)
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- Advantage / disadvantage and exploding dice support
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- Live possible-range and average readout for your dice
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- Success-threshold counting (how many dice beat a target)
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- Flip 1–100 coins at once with heads/tails tally and streak
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- Coin analytics: heads %, expected %, and a proportion bar
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- Cryptographically secure RNG — not Math.random
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- Roll history, frequency histogram, and min/max/mean/mode stats
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- Spacebar to roll, plus copy, export, and reset — 100% client-side
