Free Tools: Odds Calculators and Party Games
Party tools for the holidays, and the real odds before you play. Every tool runs in your browser and needs no account, and every calculator shows the formula behind its numbers.
Free games
Dice Roller: Roll Dice Online, Free
Roll up to ten dice online, hold the ones you want and see the total.
Minesweeper Online: Play Free, No Download
The classic in three sizes, with a safe first click and flags on long press.
Battleship Game: Play Free Against the Computer
The classic sea battle against the computer, on Easy or Hard.
Yahtzee Online: Play Free, Solo or With Friends
Five dice, three rolls and the full score sheet, alone or with friends.
Ludo Online: Play the Ludo Game Free Against the Computer
The classic race home, against the computer, in four countries' rules.
Checkers Online: Play Free Against the Computer
Checkers and draughts against the computer, in seven countries' rules.
Nine Men's Morris Online: Play Free Against the Computer
Nine Men's Morris (Mühle) against the computer: mills, flying and no download.
Snakes and Ladders Game: Play Free Online
The classic climb to 100 on the 1943 board, against the computer.
Tools and calculators
Martingale Strategy Calculator and Simulator
Simulate the martingale strategy with your own bankroll, odds and table limit.
Kelly Criterion Calculator With Risk of Ruin
Optimal bet size for any odds, with the exact risk of ruin for each stake.
Telegram Stars Calculator: Cost in USD, Rubles, Rupiah
What any number of Stars costs on Fragment and in the App Store, pack by pack.
Plinko Simulator: Drop Balls, See the Real Odds
Drop thousands of balls on real Plinko tables and compare them with the exact odds.
Mines Calculator: Odds and Multipliers for Any Board
Survival odds and multipliers for any mines board, mine count and house edge.
Keno Odds Calculator: Hit Odds and Paytable Return
Exact hit odds for any keno board, and the house edge of any paytable.
Provably Fair Checker: Verify a Round Yourself
Recompute any Gift Club round from its seeds, in your browser.
CS2 Major Simulator: Singapore 2026 Pick'Em Simulator
Simulate the Singapore Major's Swiss stages and test your Pick'Em picks.
Monty Hall Simulator: Play It, Then Run 10,000 Rounds
Play the Monty Hall problem, then run 10,000 rounds of stay versus switch.
Dice Calculator: Probability and Average of Any Roll
The chance of any dice total: exactly, at least or at most, with the full chart.
Printable Yatzy Score Sheet, Free (Maxi Yatzy Too)
Print a blank sheet for the table, or fill it in here and let it add up.
Gacha Simulator: Pity Calculator, Pull Odds and Expected Pulls
Exact pull odds with soft and hard pity, expected pulls per copy and the chance your pulls are enough.
Case Opening Simulator: Open a Free Box With Real Telegram Gifts
Open the free Spark box in your browser and see what it can hold, Telegram gifts included.
Roulette Odds Calculator: Payout Chart, European vs American
Roulette odds and payouts chart, house edge and streak odds for every bet.
Blackjack Basic Strategy Chart & Hint Trainer
Basic blackjack strategy for your table's rules, a hand lookup and a hint trainer.
Spin the Wheel Online: Free Wheel of Fortune, Your Own Options
Type your options, spin the wheel and get a random pick. Yes or no, numbers and names.
Party tools
- Secret Santa generatorDraw names with exclusions and send each person a private link. No email, no sign-up.
- Christmas countdownDays, sleeps, hours and seconds until Christmas, live in your time zone.
- New Year countdownA live count to midnight, full screen for a party, and where it is already New Year.
- Christmas trivia quizChristmas trivia questions and answers: host a team quiz, play solo, print or copy a round.
- Charades generatorRandom charades words with a timer, two teams and a Christmas pack, to play, print or share.
- White Elephant game helperThe rules, plus a host screen that draws the turn order and counts steals.
- Online advent calendar makerWrite a message for each December day and send the calendar as one link.
- Christmas bingo generatorMake different Christmas bingo cards and call them, to print or play on screens.
- Tambola ticket generatorPrint valid housie tickets and call numbers 1 to 90, with a board and voice.
- Super Bowl squares generatorFill a 10 by 10 squares grid, draw the numbers, and find the winner of each quarter.
