Four Pillars of Destiny (destiny.onl.jp)
A web app for fortune-telling based on the Four Pillars of Destiny (Shichusuimei / Ba-Zi) using birth date and time. Easily check personality and fortune through this traditional East Asian divination method.
Dice Web (dice.onl.jp)
A web tool to roll dice in the browser. Roll one or multiple dice at a time, great for board games, tabletop RPGs, and other activities.
Division Challenge (divided.onl.jp)
A math practice web app where you solve division problems within a time limit. Great for improving children's arithmetic skills or as a brain workout for adults, with score tracking.
Lunch Roulette (lunch.onl.jp)
A web app to randomly decide where to eat lunch using a roulette spinner. Register candidate restaurants and let the wheel choose for you — perfect for indecisive lunch decisions.
Subtraction Challenge (minus.onl.jp)
A math practice web app where you solve subtraction problems within a time limit. Great for improving children's arithmetic skills or as a brain workout for adults, with score recording.
Multiplication Challenge (multiplied.onl.jp)
A math practice web app for solving multiplication table problems within a time limit. Ideal for memorizing the multiplication table and track accuracy and scores to gauge progress.
Paint Web (paint.onl.jp)
A paint web app for drawing directly in the browser. Equipped with basic tools such as pen and eraser, it supports touch drawing on smartphones, tablets, and PCs.
Addition Challenge (plus.onl.jp)
A math practice web app where you solve addition problems one after another within a time limit. Great for improving children's arithmetic skills or as a brain workout for adults, with score recording.
Bingo Machine (saruwakakun.com)
A free online bingo machine. Draws numbers in roulette style and saves them automatically. Fullscreen mode makes it perfect for parties, weddings, or projector displays.
Online Dice Roller (saruwakakun.com)
A free 3D dice roller that works instantly in the browser. Roll 1 to 6 dice simultaneously. Supports button clicks, spacebar, and Enter key. No personal data collected.
Online Roulette (saruwakakun.com)
A free online roulette tool ready to use the moment you open it. Supports item customization, URL sharing, and fullscreen mode. Great for YouTube live streams or large-group events.
Reaction Time Test (toolpods.io)
Measure your reaction time in the browser. Respond to visual stimuli and see your results compared to animals.
