Coin Flip & Dice Roller

Flip a coin or roll any dice — D4 to D100. Supports multi-dice, custom ranges, RPG sets, history & stats. Free, no signup.

✓ 100% Free✓ No Signup✓ D4–D100✓ Multi-Dice✓ RPG Sets✓ Stats & History✓ Works Offline
⌨️ Keyboard shortcuts: C Coin · D Dice · M Multi · R Range · Space Flip/Roll
Number of Coins
HEADS
TAILS
Click the coin or press Space to flip!

📐 Probability & Odds Reference

🪙 Coin Flip Probabilities

Heads (or Tails)50%1/2
2× Heads in a row25%1/4
3× Heads in a row12.5%1/8
5× same in a row3.1%1/32
10× same in a row0.1%1/1024

🎲 D6 Dice Probabilities

Any specific number16.7%1/6
Roll ≥ 450%3/6
2× D6 sum = 716.7%6/36
2× D6 sum = 122.8%1/36
2× D6 both same16.7%6/36

🔮 D20 Dice Probabilities

Natural 20 (Nat 20)5%1/20
Natural 1 (Crit Fail)5%1/20
Roll ≥ 1530%6/20
Roll ≥ 1055%11/20
2× D20 both Nat 200.25%1/400

Free Online Coin Flip & Dice Roller — Make Random Decisions Instantly

Utilsly's coin flip & dice roller is a completely free, browser-based random tool that lets you flip a fair virtual coin or roll any standard dice — D4, D6, D8, D10, D12, D20, and D100. No signup, no tracking. Everything runs locally in your browser.

How to Flip a Coin Online

Select the Coin Flip tab, choose how many coins to flip (1–10), and click "Flip Coin" or press the Space bar. The result is determined by a cryptographically-seeded random number generator ensuring a true 50/50 heads or tails outcome. Flip history, streak tracking, and heads/tails statistics update in real time.

How to Roll Dice Online

Select the Dice Roller tab, pick your dice type and quantity, then click "Roll" or press Space. Supports all standard tabletop RPG dice: D4, D6, D8, D10, D12, D20, and the percentile D100. Sum, average, minimum, and maximum are displayed instantly for multi-die rolls using this free virtual dice roller.

Multi-Dice Builder for RPG & Board Games

The Multi-Dice tab lets you combine any mix of dice — for example the full D&D set (D4 + D6 + D8 + D12 + D20) — and roll them all at once. Use the quick presets for common configurations like 2×D6 (Monopoly), 3×D6 (Yahtzee/ability score), or D&D advantage rolls (2×D20).

Custom Random Number Generator

The Custom Range tab generates a random integer between any two numbers you specify — perfect for lottery draws, raffles, teacher random student pickers, or any scenario where you need a fair random number generator outside of standard dice ranges.

Is the Randomness Truly Fair?

Yes. Every result is generated using your browser's built-in random number generator, ensuring each outcome is statistically independent and unbiased. No result is stored on any server — everything stays in your browser.

Frequently Asked Questions