Kutils🐶com
All the tools you need, right here — free · no sign-up required
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🆕 New Games
View all →🔥 Stress-Relief Games
View all →Rally your squad and mow down zombie hordes
Smash bricks to bits, classic arcade style
Power-up mayhem — brick breaking turned up to 11
360° aiming, pure zone-out shooting
Blast asteroids into satisfying space rubble
Click and watch the cookies pile up — pure idle chill
🧮 Calculators
View all →🎮 Games
View all →🎳 Bowling
Aim + power timing — 10-frame bowling
🏃 100m Sprint
Mash left/right to sprint
🐱 Word Chain for Kids
Easy Korean word chain + hints
Water Sort
Sort colors into tubes
Fruit Pop
Match-3 with cascade combos
Block Puzzle
Place pieces, clear lines
Merge Pets
Suika-style merge puzzle
2048
Number puzzle game
Tetris
Classic block game
🐱 Cat Versus Tetris
Attack-Tetris duel vs cat AI
🐶 Dog Versus Tetris
Attack-Tetris duel vs dog AI
🐱 vs 🐶 Versus Tetris
Watch cat vs dog AI + bet
Snake
Classic snake game
Minesweeper
Classic puzzle game
Number Baseball
Logic puzzle game
Typing Practice
Measure typing speed
Whack-A-Mole
Reaction speed test
Cookie Clicker
Idle clicker game
Memory Game
Card matching puzzle
Sudoku
Number puzzle
Flappy Bird
Arcade flying game
Color Match
Memory pattern game
Breakout
Classic arcade game
Connect Four
Strategy board game
Hangman
Word guessing game
🔧 Utilities
View all →Image Resizer
Resize & compress, no upload
PDF Tools
Images to PDF & merge
HEIC → JPG
iPhone photos to JPG
QR Generator
Generate QR codes
Character Counter
Count text characters
Unit Converter
Convert length/weight/area
D-Day Calculator
Date countdown
Color Converter
Convert HEX/RGB
Password Generator
Generate secure passwords
Base64 Converter
Encode/Decode
JSON Formatter
Format/Minify JSON
Timer/Stopwatch
Time tracking tool
Random Picker
Random selection tool
✨ Life Utils
View all →What is Kutils?
Kutils is a free collection of online tools you can use instantly, with no sign-up. It brings together everyday calculators (take-home pay, loan limits, DSR, severance), work utilities (QR code generator, JSON formatter, unit converter), and light web games for a quick break — all in one place. Every calculation runs in your browser, and the values you enter are never stored on a server.
The tools are refined continuously based on real usage. Calculators are validated against Korean tax and finance rules, games are tuned for difficulty and fairness from play logs, and new tools are added starting with the topics people search for most. Spotted a bug or have a suggestion? Send it through our report & feedback page — we review each one.
For a fuller introduction and the complete tool list, see the About page. For how we handle your data, see our Privacy Policy.