Fun & Random Tools
Lottery, dice, roulette, and random generation tools
QR Code Generator
Convert URLs, text, and contact info to QR codes. Customizable and instant download.
List Randomizer
Randomly shuffle list items. Useful for drawings, randomized ordering, and more.
Coin Flipper
Flip a coin and get heads or tails. Flip multiple times and view statistics.
Dice Roller
Roll dice and see the results. Supports multiple dice and polyhedral dice.
Random Picker
Randomly pick one or more items from a list. Perfect for raffles, drawings, and random selection.
Team Generator
Randomly divide members into teams. Specify the number of teams or members per team for even distribution.
Spin the Wheel
Spin a customizable wheel to pick a random option. Freely add items and customize colors.
Typing Speed Test
Measure your typing speed (WPM) and accuracy in real time. Practice to improve your score over time.
Ladder Lottery Generator
Create and run a ladder lottery (Amidakuji) online. Customize the number of participants and prize settings.
Bingo Card Generator
Randomly generate bingo cards ready to print. Customize the number of cards and number range.
Random Card Draw
Simulate drawing random cards from a deck. Configure deck size and joker options.
Metronome
An online metronome with adjustable tempo. Switch between time signatures and accents to support your practice.
Calendar Display
View a monthly calendar and check holidays and days of the week. Supports month navigation and holiday display.
Date Formatter
Convert and format dates into various output styles. Supports ISO 8601, US format, European format, and more.
Timezone Converter
Instantly convert times between world time zones. Compare current times across multiple cities at a glance.
Body Surface Area Calculator
Calculate body surface area (BSA) from height and weight. Supports multiple formulas including Du Bois, Mosteller, and more.
Heart Rate Zone Calculator
Calculate target heart rate zones from your age and resting heart rate. Find your optimal zones for fat burn, cardio, and peak performance.
Digital Clock
A full-screen digital clock with 12/24-hour format toggle. Supports seconds display and customizable themes.
Analog Clock
A beautiful analog clock face displaying the current time in real-time. Customizable design with dark mode support.
Flip Clock
A retro flip-style animated clock display. Perfect for decorative displays and presentations.
Binary Clock
A unique clock that displays the current time in binary. Great for learning binary numbers and programming concepts.
Multi Timer
Create and manage multiple timers running simultaneously. Perfect for cooking, workouts, and multitasking time management.
Kitchen Timer
A quick-access kitchen timer for cooking. Preset buttons let you set common times with a single tap.
Maze Generator
Automatically generate mazes to play or print. Choose size and algorithm to adjust difficulty level.
Sudoku Generator
Generate Sudoku puzzles to solve on screen or print. Select difficulty level and toggle solution visibility.
Digital Stamp Maker (Hanko)
Create digital versions of "Hanko" — personal seal stamps used in Japanese business culture instead of signatures. Enter a name, choose shape, font, and color, then export as transparent PNG.
Invoice Generator
Create professional invoices and export as PDF. Set line items, tax rates, and payment details for instant billing.
Color Blindness Test
Check your color vision with Ishihara-style color plate tests. Multiple test formats available with instant results.
Online Ruler
Display a real-size ruler in your browser to measure objects. Screen calibration ensures accuracy on any monitor.
Online Protractor
Measure angles precisely with an online protractor in your browser. Drag to intuitively align and measure angles.
Mouse Tester
Test all mouse buttons, scroll, and click speed. Detect double-clicking issues and measure CPS.
Keyboard Tester
Test all keyboard keys and detect simultaneous key presses. Pressed keys are highlighted on a visual keyboard layout.
Decibel Meter
Measure ambient sound levels in decibels (dB) in real time using your microphone. Records average and peak values with noise level reference.
WiFi QR Code Generator
Generate a QR code from your WiFi SSID and password. Just scan with a phone to share your WiFi connection instantly.
Flash Card Maker
Create flash cards with questions on front and answers on back for study. Supports shuffle mode and CSV import for efficient learning.
Life Grid Visualizer
Visualize your life as a grid of weeks, months, or years. Mark life events and see how much time you have left.
Julian Date Converter
Convert between Julian Date (JD), Modified Julian Date, and Gregorian calendar. Supports high-precision bidirectional conversion including time.
Moon Phase Calculator
Calculate and display the moon's age and phase for any given date. Includes realistic visuals and monthly calendar view.
Birthday Weekday Finder
Find out what day of the week you were born on. Also shows birthday trivia and the weekday of your next birthday.
Age in Days Calculator
Calculate exactly how many days, hours, minutes, and seconds you've been alive. Get notified about milestone days like your 10,000th day.
Meditation Timer
A timer with bell sounds for meditation and mindfulness practice. Set intervals and choose from preset durations.
Presentation Timer
Manage your presentation time with color-coded warnings for remaining time. Supports fullscreen display and section-based time allocation.
Exam Timer
A subject-based timer designed for exam and test time management. Includes presets for standardized tests like SAT and TOEIC.
Child Height Predictor
Predict a child's adult height based on parents' heights. Includes gender-specific formulas and margin of error display.
Blood Type Inheritance Calculator
Calculate possible blood types and probabilities for children based on parents' blood types. Shows ABO genotypes and Rh factor inheritance patterns.
Rock Paper Scissors
Play Rock Paper Scissors against the computer. Track wins, losses, and draws with a real-time scoreboard.