Flip a fair coin or roll secure dice with crypto randomness. Track heads-tails streaks and dice totals, all private and offline in your browser.
Part of our Generators collection — Explore more Generators tools · See also: Password & Passphrase Generator, Lorem Ipsum Generator.
Quick answer: Coin Flip & Dice Roller — Flip a coin or roll dice Free, no signup, runs in your browser. See below for the interactive tool, 4-step guide and FAQs.
Best of
Reviewed by the Tool4SaaS Editorial Team — In-house reviewers who build and test every tool locally for accuracy across current Chrome, Edge, Firefox, and Safari. Last updated: . See our authors, methodology or contact us.
Two views share one tab bar. Coin delivers a fair Heads or Tails with a running tally, streak counter and best-of-3, 5 or 7 series, while Dice rolls from one to twenty dice with two to one hundred sides each and shows the faces and their total. Flip for a kickoff, then roll 2d6 for a board game, copying either result in one click.
Yes. Each coin toss draws one unbiased bit and each die face draws from window.crypto with rejection sampling, so modulo bias that would skew small faces never appears, unlike Math.random. Over 100 flips expect about 50 heads, give or take 5, and 1d20 gives every face a 5 percent chance. Everything computes locally with no tracking.
Roll up to 20 dice with 2 to 100 sides each in one batch. Use 2d6 for board games that average 7, 1d20 for initiative with 5 percent critical odds, or 4d8 for 4 to 32 damage. Presets for d6, d20, 2d6 and 3d6 speed common rolls, and the last twenty rolls stay in a history list on your device.
Two dice combine 36 pairs, and there are six ways to make 7 but only one way to make 2 or 12, so totals bunch in the middle. Roll 2d6 a hundred times and you land near 17 sevens against roughly 3 twos, matching theory. The tool shows each face such as 4 and 6 with a total of 10, making the distribution visible during play and teaching.
Every result has a one-click copy button. Copy Heads to settle a toss, or a whole dice line like 2d6: 4 + 6 = 10 straight into Discord, campaign notes or a spreadsheet. The coin view can also copy its full history, and the dice history keeps the last twenty rolls so you can scroll back before logging an official outcome.
Nothing is uploaded. Both views compute locally in your browser and clear when the tab closes, so results stay private. After the page loads the tools work offline, which suits classrooms, conventions, travel and power outages. No account or sign-up is needed, and rapid clicks still resolve to a valid result you can log.
Two views centralize fair chance outcomes in one offline page. Coin returns Heads or Tails with a live tally, current and longest streak, and a best-of-3, 5 or 7 scoreboard, while Dice rolls one to twenty dice with two to one hundred sides and reports each face and the total. A toss might read Heads to award a kickoff, 2d6 might return 4 and 6 for 10, and 1d20 might land 17 for initiative. Reference table: 100 flips equal about 50 heads, give or take 5, 1d20 gives 5 percent per face, and 2d6 totals near 7 about 16.7 percent of the time.
Each outcome draws from window.crypto with rejection sampling, which discards out-of-range draws so no face or side is favoured, unlike predictable Math.random sequences. The coin uses a single unbiased bit, while each die samples independently, so two dice combine thirty-six equally likely pairs. That is why 2d6 clusters at 7 and 1d20 stays flat, and why a four-head streak appears about once in every sixteen runs rather than signalling a rigged coin. Limitation: streaks look surprising but are expected, and results are independent, so a run of tails never raises the odds of heads.
Settle a match: flip best-of-5 for order, read the heads-tails tally, then roll 2d6 for your move and copy 2d6: 4 + 6 = 10 into the game log. For initiative, roll 1d20 and note the 5 percent crit band. Edge case: rolling 20d100 produces a long list, so scroll horizontally and copy the total rather than misreading it during a live session. The coin and dice views both clear on close, so export anything official first. For numeric ranges beyond dice, use the random generator's Numbers view.