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Whether you need to make a quick decision, settle a tie, or roll for a tabletop game, I7 Pixel's coin flip and dice roll simulator gives you instant, fair, random results — live in your browser, with no upload and no signup. Flip multiple coins, roll any combination of dice, and track everything with built-in history and stats.
Getting a random result takes just four steps.
Understanding how the tool generates results helps you trust and configure it for your use case.
Every coin flip and dice roll is generated using JavaScript's built-in Math.random() function, which produces a pseudo-random floating-point number between 0 and 1. For a coin flip, a result below 0.5 is "heads" and above is "tails"; for a dice roll with N sides, the result is scaled and rounded to a whole number between 1 and N. All of this runs inside your browser's JavaScript engine — no data is ever sent to a server.
d6 is the standard six-sided die used in most board games. d20 is the core die for tabletop RPGs like Dungeons & Dragons, used for ability checks and attack rolls. d4, d8, and d12 are common for weapon damage and spell effects. d10 is used for percentile systems and certain RPG mechanics, while d100 rolls a percentage directly. The Custom option lets you simulate any die from 2 to 9999 sides for games, raffles, or probability experiments.
Flip/roll animation adds a brief visual spin so results feel more tactile — turn it off for instant results. Sound effects add audio feedback on each flip. Show sum displays the total and average for multi-dice rolls. Highlight max/min visually marks the highest and lowest dice in a roll, useful for spotting critical successes or failures at a glance.
Quick reference for choosing the right die for your game or task.
| Die | Sides | Common Use |
|---|---|---|
| d4 | 4 | Tetrahedron die — small weapon damage, minor effects in tabletop RPGs |
| d6 Popular | 6 | Standard board game die — Monopoly, Yahtzee, most classic games |
| d8 | 8 | Octahedron die — weapon and spell damage in RPGs |
| d10 | 10 | Decahedron die — percentile systems, certain RPG mechanics |
| d12 | 12 | Dodecahedron die — larger weapon damage, calendar-based games |
| d20 Popular | 20 | Icosahedron die — core mechanic for D&D and many tabletop RPGs |
| d100 | 100 | Percentile die — direct percentage rolls, rare-item odds |
| Custom | 2-9999 | Any die — raffles, probability tests, custom games |
Random number and outcome generation is useful far beyond games.
Answers to the most common questions about the coin flip and dice roll tool.
Yes — completely free. There are no limits, no accounts, no watermarks, and no charges. Flip or roll as many times as you need, as often as you need.
Results are generated using JavaScript's Math.random(), which provides a high-quality pseudo-random number suitable for games, decisions, and casual use, entirely within your browser.
You can flip up to 12 coins at once, or roll up to 20 dice at once, with any combination of d4, d6, d8, d10, d12, d20, d100, or a custom number of sides.
No — never. All flips and rolls run entirely in your browser using JavaScript. Nothing is transmitted, logged, or stored anywhere outside your device.
Yes. Select "Custom…" from the Dice Type dropdown and enter any number of sides between 2 and 9999.
Yes. The History panel shows your recent flips or rolls with timestamps, and the Stats tab shows session totals like heads/tails ratio or average dice sum.
Tried the tool? Leave a quick rating and help others find it.
All tools at I7 Pixel run in your browser — no uploads, no accounts, always free.