3 new tools in the last 30 days
The tool you need, in 3 seconds
Calculators, converters, and a few things to poke at when you are bored. No sign-up, no install.
Just shipped
Latest 6Visual IT Encyclopedia
Understand IT concepts such as disk scheduling and ARP spoofing through a definition and a step-by-step diagram.
Try it →September 30Koi Pond Growing Game
Steer a koi with the arrow keys or touch, eat fish smaller than you, and grow a little with every bite in this 3D pond game. Watch out for bigger fish.
Try it →September 29Jelly Dice Roller
Grab, stretch, poke and roll translucent gummy dice in 3D. Every result is read from each die's actual resting face.
Try it →September 3Pomodoro Timer
Set focus and break durations, study with natural backgrounds, and keep your focus history in this browser.
Try it →August 18Pass Map
A mind map for laying out everything you need to study on one canvas. Branch out fast with the keyboard, stay smooth as it grows, and save your maps to a file or Google Drive.
Try it →July 292048 Combo
Slide and merge 3D tiles, build combo chains, and challenge your personal best in an immersive 2048 game.
Try it →All tools
39 liveVisual IT Encyclopedia
Understand IT concepts such as disk scheduling and ARP spoofing through a definition and a step-by-step diagram.
Koi Pond Growing Game
Steer a koi with the arrow keys or touch, eat fish smaller than you, and grow a little with every bite in this 3D pond game. Watch out for bigger fish.
Jelly Dice Roller
Grab, stretch, poke and roll translucent gummy dice in 3D. Every result is read from each die's actual resting face.
Pomodoro Timer
Set focus and break durations, study with natural backgrounds, and keep your focus history in this browser.
Pass Map
A mind map for laying out everything you need to study on one canvas. Branch out fast with the keyboard, stay smooth as it grows, and save your maps to a file or Google Drive.
2048 Combo
Slide and merge 3D tiles, build combo chains, and challenge your personal best in an immersive 2048 game.
Chart Trading Practice
A mock trading game where you predict the next candle direction and practice day and swing trading.
Daily Fortune Cookie
Tap a fortune cookie or four-leaf clover to reveal a playful daily fortune.
Tearable Cloth Simulator
An interactive simulator where you drag, tear, texture with images, and set fire to Verlet-physics cloth.
JSON Toolkit
All-in-one JSON validation, formatting, comparison, and conversion
Study Cards
A private study tool for organizing sets in folders, reviewing flashcards, and backing everything up as JSON.
Color Vision Test
Find the one tile with a slightly different color in the grid to test your color perception.
Emoji Finder
Search emoji by Korean or English keywords and copy them instantly.
World Flags Quiz
Choose a difficulty and region, identify world flags, and challenge your best score.
GitHub Profile Comparator
Compare two GitHub profiles with public metrics, charts, and a clear winner card.
Space Gallery
Browse NASA Astronomy Picture of the Day entries by date and save favorites in your browser.
Kinetic Text Effect Generator
Preview animated text in real time and export ready-to-use CSS or Motion code.
Exchange Rate Time Machine
Review historical FX charts and simulate conversions for a specific past date.
QR Code Generator
Generate downloadable QR codes for text, URLs, WiFi, and more in one place.
Ethereum Account Generator
Generate an Ethereum address, private key, and 12-word mnemonic locally in the browser, then back them up with QR and JSON.
Days Since Birth Calculator
Accurately calculate the elapsed days from birth date to a reference date.
Character Counter + Meta Snippet Checker
Check body text counts and the title/description length shown in search results in one place.
Korean-English Typo Converter
Quickly convert mistyped text between Korean and English keyboard layouts.
Gradient Generator
A free tool to visually create CSS gradients and copy the code.
Ethereum Unit Converter
Convert between all Ethereum denomination units including ETH, Gwei, and Wei.
1-Min Interview Rhythm Coach
Analyze script timing and 4-section pacing to polish your interview self-introduction.
Workday Calculator
Calculate workdays between two dates, excluding weekends and Korean holidays.
Date Calculator
Calculate the difference between two dates in days, weeks, and months.
D-Day Counter
Count down the remaining days to your target date in real time.
Random Number Generator
Generate random numbers instantly within a specified min–max range.
Lotto Number Generator
Randomly draw 6 numbers from 1–45 for the Korean Lotto 6/45.
Color Code Converter
Convert between HEX, RGB, and HSL color codes in real time.
Draw Picker
Randomly pick one item from your list — an online raffle tool.
Percent Calculator
Switch between discount, change rate, ratio, and margin calculations with tabs.
Random Roulette
Aim at a spinning target with 2–10 options, decide by the sector you hit, and share the result.
Han River Temp Check
Quickly check the latest water temperature and pH at major Han River monitoring points.
Planet Age Calculator
Enter your Earth age and see your age on all 8 planets updated in real time.
Military Service Calculator
Calculate remaining service days and upcoming milestones based on enlistment date.
Time↔Frame Calculator
Quickly convert between time and frame values based on video length and frame rate.