Life & Health
Music & Hobby
Luck & Fortune
Skill & Fun
Finance
✦ Jay Project
Everyday Tools
for a Better Life
A collection of simple yet useful web tools that add fun and practicality to everyday life.
From a lottery generator and BMI calculator to a balance game and salary calculator — fun and handy web apps, all in one place.
What can you do here?
Tools for every occasion:
Lottery Number Generator
Create your lucky numbers with a click!
Salary Calculator
Calculate your actual take-home pay.
Stock Average Calculator
Pre-calculate your average price when buying more.
Compound Interest Calculator
See the magic of compound growth.
FIRE Simulator
Simulate your target wealth and retirement timeline.
Dividend Reinvestment Simulator
Forecast long-term returns with reinvested dividends.
DCA Calculator
Calculate future wealth from monthly investing.
Loan Calculator
Compare monthly payments and total interest by repayment type.
Balance Game
What is your choice in difficult situations?
Reaction Speed Test
How fast are your reflexes?
Quick Click Test
Challenge your click speed in 10 seconds.
1 to 50 Game
A test of focus and speed!
Chromatic Trainer
Build finger independence with chromatic scale practice.
Metronome
Keep perfect time during music practice.
Typing Practice
Sharpen your typing skills.
10.000s Challenge
Can you stop exactly at 10 seconds? Test your focus!
Dream Interpretation
Ask AI about your dreams.
Name Compatibility
A fun love compatibility test!
Zodiac Compatibility
Check harmony through zodiac signs.
D-Day Calculator
Manage your important dates easily.
Age Calculator
Calculate your exact Korean legal age accurately.
JSON Formatter
Prettify and validate your JSON data.
Gratitude Journal
Record daily gratitude and stay positive.
Text Counter
Count characters and spaces.
BMI Calculator
Check your health and set goals.
Bomb Game
A thrilling countdown penalty game.
Random Draw/Ladder/Roulette
Fair and fast decision making.
QR Code Generator
Generate QR codes effortlessly.
Fortune Cookie
Receive inspiring messages.
Dice Roller
Roll the dice anytime.
Team Picker
Divide teams fairly and easily!
Unit Converter
Convert length, weight, temperature and more.
Menu Decider
Decide what to eat today.
Gift Decider
Get gift ideas for any occasion.
Color Sensitivity Test
Find the slightly different block!
More new and exciting tools are continuously being added based on fresh ideas.