🎲 Dice Roller
Roll Dice Online Instantly
or press Spacebar
📜 Roll History
No rolls yet. Roll the dice to see your history!
What Is the Dice Roller?
Dice Roller is a free, browser-based dice simulator that lets you roll virtual dice with realistic results powered by browser-based cryptography. It solves the problem of needing physical dice for games, RPG sessions, or random number generation. No downloads, no sign-ups — everything runs locally in your browser.
Key Features
- 7 Dice Types: Choose from d4, d6, d8, d10, d12, d20, and d100 — all standard tabletop RPG dice at your fingertips.
- Customizable Quantity: Roll 1 to 10 dice at once. See individual results and an auto-calculated total for each roll.
- Cryptographic Randomness: Uses the browser's crypto.getRandomValues() API for truly fair, unbiased rolls — better than Math.random().
- Roll History: Track your last 20 rolls with timestamps, dice types, individual results, and totals. Never lose a roll.
- Keyboard Shortcut: Press the Spacebar to roll instantly — faster than clicking. Great for rapid-fire RPG sessions.
📋 When to Use the Dice Roller
Board game night and someone lost the dice — open Dice Roller and keep the game going. Dungeon Master needs to roll 4d6 for character stats — select d6, quantity 4, and roll. Teaching probability in a classroom — use the history log to demonstrate distribution over multiple rolls. Playing a tabletop RPG remotely — share your screen or use the embed on your campaign wiki. Need a quick random number from 1-20 for a saving throw — pick d20 and roll instantly.
⚙️ How the Dice Roller Works
Dice Roller uses the browser's built-in crypto.getRandomValues() API to generate cryptographically strong random numbers, which are then mapped to dice faces. Each die roll is independent and uniformly distributed — a d6 has exactly a 1/6 chance for each face. The total is simply the sum of all individual dice results. All computation happens locally in your browser — nothing is sent to any server. The d6 display shows traditional dot patterns for a realistic feel, while all other dice types show numeric results.
How to Use the Dice Roller
- Select your dice type — Click any of the d4, d6, d8, d10, d12, d20, or d100 buttons. The active die type is highlighted.
- Choose how many dice to roll — Use the +/− buttons to set the quantity from 1 to 10.
- Roll the dice — Click the big "Roll Dice" button or press your Spacebar. The dice animate briefly, then settle on random faces.
- Read your results — Each die shows its individual result. The total sum appears below in large text.
- Copy or share — Click the "Copy Results" button to copy all individual results to your clipboard.
- Review your history — Scroll down to see all your previous rolls with timestamps and totals.
Frequently Asked Questions
How do I roll a d20 online for D&D?
Select the d20 dice type from the Dice Roller, set quantity to 1, and click Roll Dice. The tool uses the browser's crypto.getRandomValues() API for fair, unbiased rolls. Each face has exactly a 5% (1/20) chance — perfect for D&D ability checks, saving throws, and attack rolls.
Can I roll multiple dice at once and see individual results?
Yes. Set the quantity slider to any number from 1 to 10. Each die rolls independently and shows its own face. The total sum is calculated automatically. You can see each die's result separately — great for rolling 4d6 for character stats or 3d8 for damage.
Is the Dice Roller free to use without sign-up?
Absolutely. The Dice Roller is completely free with no registration, no downloads, and no paywalls. All dice rolling happens locally in your browser — nothing is sent to any server. You can roll as many times as you want without limits.
Does the dice roller work on mobile phones?
Yes, the Dice Roller is fully responsive and works on all devices — phones, tablets, and desktops. The touch-friendly interface makes it easy to tap and roll on mobile. No app installation needed — just open the website in any modern browser.
How accurate are the dice rolls? Is it truly random?
Each die roll uses the Web Crypto API (crypto.getRandomValues()), which provides cryptographically strong random numbers from the operating system's entropy pool. This produces statistically uniform, unbiased results that are indistinguishable from true randomness — more reliable than physical dice, which can have manufacturing imperfections.
What dice types are available in the roller?
The Dice Roller supports d4 (tetrahedron), d6 (cube), d8 (octahedron), d10 (decahedron), d12 (dodecahedron), d20 (icosahedron), and d100 (percentile). These cover all standard tabletop RPG dice used in D&D, Pathfinder, and other gaming systems.
How do I roll 4d6 drop lowest for character creation?
Select d6, set quantity to 4, and roll. The individual results are shown — simply ignore the lowest number and sum the remaining three. The tool displays each die face clearly so you can manually drop the lowest. Repeat 6 times for a full D&D stat array.
What's the difference between d100 and rolling two d10s?
A d100 roll gives a single result from 1 to 100 with uniform distribution. Rolling two d10s (one for tens, one for ones) also produces 1-100 but requires designating one die as the tens digit. Our d100 option gives the result directly — no math or designation needed.
Can I embed the Dice Roller on my RPG campaign website?
Yes. Copy the embed code from the "Embed This Tool" section and paste it into your website's HTML. The embedded dice roller is fully functional with the same dice types, quantity control, and results display. Perfect for campaign wikis, Discord servers, or gaming forums.
Why use crypto.getRandomValues instead of Math.random for dice?
crypto.getRandomValues() generates cryptographic randomness from the operating system's entropy pool, while Math.random() uses a deterministic pseudo-random algorithm that can exhibit subtle statistical biases over many rolls. For fair gaming, the cryptographic approach guarantees each face has truly equal probability.