Dice Roller and Bingo Machine: two party tools for a phone or a projector, no app required

Two of the simplest pages on Omikuji Tools are a Dice Roller and a Bingo Machine. Both are for the moment when the physical thing is missing (the dice went under the sofa, nobody brought a bingo cage) and a phone or a meeting-room screen is already there.

Dice Roller: three 3D dice with the total shown above

Dice Roller

Choose from one to six dice and press Roll (or Space / Enter). The dice are real 3D cubes drawn with CSS transforms and tumble for a moment before they land; the total and each face are shown above them, and the last 12 rolls stay in a history list. The rolling sound is synthesized in the browser, and a toggle turns it off for quiet rooms. There is a full-screen button for when the whole table needs to see it. Uses on the page: board games and sugoroku, TRPGs, turn order in a classroom, settling who does which chore.

Bingo Machine

Press Start (or Space / Enter) and the ball flickers through the numbers still in play; press again to stop it, or it stops by itself after five seconds. The default range is 1 to 75, like standard bingo, and the maximum can be set anywhere from 5 to 999. Numbers are drawn from the ones not yet called, so nothing repeats, and a board shows every number with the called ones marked. The draw history is saved in your browser, so an accidental reload in the middle of a party does not lose the game. Full-screen mode makes the number big enough for a projector.

Getting the randomness right

A common shortcut for shuffling in JavaScript, sorting with a random comparator, gives biased results. A code audit of the whole tools site found that none of the lotteries use it: draws pick uniformly from what is left, and shuffles use Fisher–Yates.

Features

  • Dice: 1–6 dice, 3D animation, automatic sum, history of 12 rolls, sound toggle, full screen
  • Bingo: adjustable maximum (5–999), no repeats, board view, history kept across reloads, full screen
  • Keyboard: Space / Enter to roll or draw
  • Nothing is sent to a server; no sign-up

👉 Dice Roller 👉 Bingo Machine

Comments

Post a Comment

Popular posts from this blog

Amidakuji (Ghost Leg) maker: a fair random pairing tool for up to 200 people, entirely in the browser

Image
Amidakuji is the Japanese ladder lottery: names go along the top, prizes or roles along the bottom, and each person traces a path down a ladder with random rungs. Every name lands on exactly one result, and nobody can predict it. Offices in Japan use it for seating, task assignment and drawing lots. I built a browser version that works for up to 200 people. How it works Enter names (and optionally results). Paste a column from a spreadsheet and the rows fill in automatically; tab-separated "name → result" pairs work too. Press Draw and watch each path animate down the ladder, or reveal them one at a time. Nothing is sent to a server. The whole lottery (names, results, and the random seed for the rungs) lives in the URL after the # , so you can hand the link to others and they will open exactly the same ladder. Cheat prevention : turn it on and the results stay hidden until every path has been traced. Redrawing changes the seed, so a new link means a new draw. Share...
Read more

omikuji.dev: free browser-based tools, puzzle games and reference sites made in Japan

Image
This blog is where I post news about the sites I build and run under omikuji.dev . Everything is free, needs no sign-up, and wherever possible runs entirely in your browser so that nothing you type or drop into a page ever leaves your device. What is there Omikuji Tools — about 130 small web tools: timers and clocks, a ladder lottery, PDF and audio converters, text converters, network checks (SSL certificate, DNS, IP address), calculators and print templates. Most are available in 12 languages. omikuji games — 105 browser games (puzzles, logic, arcade, brain training, play against the CPU, and games for small children). Everyone gets the same daily puzzle and can post to that day's leaderboard. Japanese only for now. Reference sites — a kaomoji dictionary (59,000 Japanese text faces), an emoji dictionary, a dictionary for the Japanese word game shiritori , traditional colors of the world with sources, and a guide to etiquette mistakes travelers make abroad. These are in Ja...
Read more

Hakarasenai: a Firefox extension that only stops Google Analytics from measuring you

Image
The second piece of software I publish is Hakarasenai , a Firefox extension for desktop and Android. The name means "won't let it measure", and that is the entire feature list: it stops Google Analytics from measuring you. Free, MIT licensed, on addons.mozilla.org (v1.2.0). Why it exists Google ships an official "Google Analytics Opt-out Add-on", and there is a Firefox build of it. The trouble is how it works: it injects a <script> element into the page, and Firefox, like Safari, applies the page's own Content Security Policy to content scripts. On any site with a strict CSP the injection is blocked and the opt-out quietly does nothing. Nothing tells you it failed, which is the worst failure mode a privacy tool can have. I ran into this while trying to keep my own visits out of the GA4 properties of my sites, and wrote this instead. Two layers It tells the Google Analytics code on the page that you have opted out, using the same official hook...
Read more