UtilityNewComing Soon
Drop Roulette
A gravity-based drop animation that visualizes lottery rankings step by step.
Coming Soon
Issue #33
One Tool a Day
A micro service collection for those who seek a better way than yesterday.
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“Efficiency is doing better what is already being done.”— Peter Drucker
WHY MODUHUB
A Tool Hub With Published Standards
We expose trust signals through dedicated pages and review criteria, not just through technical SEO markup.
- Public mission, editorial standards, and review method
- Separate paths for contact, partnerships, and bug reports
- Per-service editorial audit coverage for active tools
EDITORIAL GUIDES
Use The Right Tool With Context
Instead of exposing a bare directory, we publish short guides that explain which tool fits which problem first.
SEO Writing Workflow Guide
Walk through character checks, snippet review, and image prep as one publishing workflow.
Date & Work Calculator Guide
Compare when to use D-day, date difference, and workday calculators for real planning tasks.
Random Picker Guide
See when to use a random number generator, picker, or roulette for events and lightweight operations.
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CalculatorNewAvailable
Planet Age Calculator
Enter your Earth age and see your age on all 8 planets updated in real time.
02
ConverterNewAvailable
Color Code Converter
Convert between HEX, RGB, and HSL color codes in real time.
03
ConverterNewAvailable
Color Picker
Select any color on screen and copy HEX or RGB codes instantly.
04
UtilityNewAvailable
Color Vision Test
Find the one tile with a slightly different color in the grid to test your color perception.
05
CalculatorNewAvailable
D-Day Counter
Count down the remaining days to your target date in real time.
06
CalculatorNewAvailable
Date Calculator
Calculate the difference between two dates in days, weeks, and months.
07
CalculatorNewAvailable
Days Since Birth Calculator
Accurately calculate the elapsed days from birth date to a reference date.
08
UtilityNewAvailable
Random Roulette
Enter 2–10 options, spin the roulette, and share the result via link.
09
UtilityNewAvailable
Draw Picker
Randomly pick one item from your list — an online raffle tool.
10
UtilityNewAvailable
Emoji Finder
Search emoji by Korean or English keywords and copy them instantly.
11
ConverterNewAvailable
Ethereum Unit Converter
Convert between all Ethereum denomination units including ETH, Gwei, and Wei.
12
UtilityNewAvailable
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.
13
CalculatorNewAvailable
Exchange Rate Time Machine
Review historical FX charts and simulate conversions for a specific past date.
14
UtilityNewAvailable
GitHub Profile Comparator
Compare two GitHub profiles with public metrics, charts, and a clear winner card.
15
UtilityNewAvailable
Golden Hour Photo Planner
No login required. Combine sunrise/sunset and weather data to find the best photo window and save plans on your device.
16
ConverterNewAvailable
Gradient Generator
A free tool to visually create CSS gradients and copy the code.
17
UtilityNewAvailable
Han River Temp Check
Quickly check the latest water temperature and pH at major Han River monitoring points.
18
UtilityNewAvailable
JSON Toolkit
All-in-one JSON validation, formatting, comparison, and conversion
19
UtilityNewAvailable
Kinetic Text Effect Generator
Preview animated text in real time and export ready-to-use CSS or Motion code.
20
ConverterNewAvailable
Korean-English Typo Converter
Quickly convert mistyped text between Korean and English keyboard layouts.
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CalculatorNewAvailable
Character Counter + Meta Snippet Checker
Check body text counts and the title/description length shown in search results in one place.
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UtilityNewAvailable
Lotto Number Generator
Randomly draw 6 numbers from 1–45 for the Korean Lotto 6/45.
23
UtilityNewAvailable
1-Min Interview Rhythm Coach
Analyze script timing and 4-section pacing to polish your interview self-introduction.
24
CalculatorNewAvailable
Percent Calculator
Switch between discount, change rate, ratio, and margin calculations with tabs.
25
UtilityNewAvailable
QR Code Generator
Generate downloadable QR codes for text, URLs, WiFi, and more in one place.
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UtilityNewAvailable
Random Number Generator
Generate random numbers instantly within a specified min–max range.
27
UtilityNewAvailable
Space Gallery
Browse NASA Astronomy Picture of the Day entries by date and save favorites in your browser.
28
UtilityNewAvailable
Study Cards
A private study tool for organizing sets in folders, reviewing flashcards, and backing everything up as JSON.
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CalculatorNewAvailable
Time↔Frame Calculator
Quickly convert between time and frame values based on video length and frame rate.
30
CalculatorNewAvailable
Used Car Tax Calculator
Estimate acquisition tax, local education tax, bond discount cost, and registration fees for a used car purchase.
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CalculatorNewAvailable
Workday Calculator
Calculate workdays between two dates, excluding weekends and Korean holidays.
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UtilityNewAvailable
World Flags Quiz
Choose a difficulty and region, identify world flags, and challenge your best score.
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UtilityNewAvailable
World Recipe Explorer
Search global recipes by category and country with favorites and a cooking timer.
ConverterNewComing Soon
Image Compressor & Format Converter
Compress image size and convert to WebP directly in the browser.
Coming Soon
AI ToolsComing Soon
MBTI Compatibility Test
Take a question-based test, share results, and explore related content.
Coming Soon
CalculatorComing Soon
Military Service Calculator
Calculate remaining service days and upcoming milestones based on enlistment date.
Coming Soon
UtilityComing Soon
Nickname Generator
Generate and save nicknames by platform and tone.
Coming Soon
AI ToolsComing Soon
AI Prompt Collection
Browse and copy AI prompts organized by task and purpose.
Coming Soon
CalculatorNewComing Soon
Race Split Planner
Plan segment-by-segment race pacing from your goal time and course conditions.
Coming Soon
AI ToolsNewComing Soon
Government Subsidy AI
Get personalized subsidy recommendations based on your specific business context.
Coming Soon