Free Online Calculators & Tools Collection

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🆕 New Features

7

Check out the latest tools we've added

📅 Korea Holidays Calendar 2026-2027

Substitute & sandwich days + smart annual leave recommendations

🌍 World Cities Weather Comparison

Click-only interface to compare real-time weather in 32 cities

🗣️ Korean Name Pronunciation Guide

Korean name → IPA, Romanization, English sound approximation

💸 Budget Pace Until Payday

Remaining budget + payday → daily allowance + 50/30/20 split

🚇 Commute Cost Calculator

Method/distance/time → monthly/yearly cost + time value

🏷️ Cost Per Use Calculator

Price ÷ uses = cost per use + value grade (S~D)

🎲 Random Daily Challenge

Daily challenges in 6 categories (Health/Social/Savings/Creativity/Env/Growth)

💰 Salary & Employment

23

Accurately calculate wages, severance pay, and insurance premiums

💰 Severance Pay Calculator (South Korea)

Calculate severance pay based on Korean labor law

🏥 4 Social Insurances (South Korea)

Calculate Korean National Pension, Health, Employment & Industrial Insurance

💵 Unemployment Benefits (South Korea)

Estimate Korean unemployment benefit amount and duration

💸 Weekly Holiday Allowance (South Korea)

Calculate Korean weekly holiday pay for part-time workers

👶 Parental Leave Pay (South Korea)

Estimate Korean parental leave benefit payments

💵 Minimum Wage Calculator (South Korea)

Calculate daily, weekly, monthly pay from South Korea's 2026 minimum wage

🔄 Wage Converter (South Korea)

Convert between hourly, daily, weekly, monthly wages for South Korea

📅 Annual Leave Calculator (South Korea)

Calculate vacation days based on South Korean labor standards

💰 Salary Calculator (South Korea)

Calculate take-home pay for South Korea (social insurance, tax deductions)

📊 2026 Salary Table (South Korea)

View take-home pay for salaries from 20M to 300M KRW in South Korea

💰 Salary Per Second

Real-time counter showing your earnings per second

⏰ Salary Time Value

How many hours to work to afford this item?

💸 Where Did My Salary Go

Visualize salary flow with a Sankey diagram

📊 Salary Percentile Calculator

Where does your salary rank? Check income percentile

💰 Reverse Salary Calculator

Find required gross salary from desired take-home pay

🏦 Retirement Pension DC vs DB (South Korea)

Compare Korean DC and DB pension plans

💼 Freelancer 3.3% Tax Calculator

Calculate net income after 3% income tax + 0.3% local tax withholding

⏰ Work Hours Timesheet

Track daily work hours with weekly/monthly auto summation

🔌 EV Charging Cost Calculator

Calculate charging costs by battery capacity, compare provider rates

🎖️ Military Discharge Calculator

Calculate discharge date, remaining days & progress by branch

🏛️ National Pension Calculator

Estimate monthly pension based on enrollment & income

⏱️ Real Hourly Wage

Calculate true hourly rate including commute & overtime

🎯 Quit Date Calculator

Financial runway after quitting based on savings & expenses

🏦 Loans & Savings

27

Compare loan repayments, interest rates, and savings returns

💵 Loan Interest Calculator (South Korea)

Detailed calculation of monthly payments and total interest (South Korea finance)

📋 Loan Amortization Schedule

Monthly/yearly repayment breakdown with interest comparison

🚗 Car Installment Calculator (South Korea)

Calculate monthly car payments and interest in KRW

💳 Card Installment vs Lump Sum

Compare installment fees, interest-free benefits, and lump sum discounts

📈 Compound Interest Calculator

Calculate compound returns and investment growth

🏦 Savings Interest Calculator

Calculate savings & deposit interest, tax, and net amount

🔥 FIRE Calculator

Simulate financial independence target, timeline & savings rate

💰 Deposit/Savings Interest Calculator

Calculate after-tax interest for time deposits and installment savings

📉 Early Termination Penalty Calculator

Calculate losses from early termination of deposits, savings, and insurance

💳 Card Revolving Interest Calculator

Simulate credit card revolving interest and total cost analysis

🔄 Loan Refinancing Calculator

Calculate net profit, prepayment fees, and break-even for loan refinancing

📈 Rule of 72 Calculator

Calculate investment doubling time and compare rates

💹 Inflation Calculator

Calculate purchasing power changes due to inflation

📊 Savings vs Investment

Compare savings interest vs investment returns

💰 Savings Challenge

Day 1=$1, Day 365=$365 incremental savings tracker

☕ Coffee Savings Calculator

Daily coffee cost → 1yr/5yr/10yr compound savings visualization

🚫 No-Spend Tracker

Calendar tracker with streak and savings counter

☕ Small Joy Calculator

10-year impact of daily small spending with compound interest

💸 SNS Time Cost Calculator

Hourly wage × SNS time = opportunity cost

🛵 Delivery Fee Splitter

Fair delivery fee split among multiple people (equal/proportional/hybrid)

☕ Cafe Stay Cost Calculator

Drink price ÷ stay time = hourly cost + manner score

🎮 Game Time to Wage Converter

Game hours × wage = daily/weekly/monthly opportunity cost

🌍 Personal Carbon Footprint

Car/electricity/meat → CO₂ emissions + eco grade

📚 Reading ROI Calculator

Book price ÷ hours read = value/hour + per-book ROI

💸 Budget Pace Until Payday

Remaining budget + payday → daily allowance + 50/30/20 split

🚇 Commute Cost Calculator

Method/distance/time → monthly/yearly cost + time value

🏷️ Cost Per Use Calculator

Price ÷ uses = cost per use + value grade (S~D)

🏠 Real Estate & Tax

7

Understand taxes and costs involved in real estate transactions

🏠 Acquisition Tax Calculator (South Korea)

Calculate real estate acquisition tax based on South Korean tax law

🏠 Capital Gains Tax Calculator

Calculate Korean property/stock transfer tax with deductions

💰 Inheritance & Gift Tax (South Korea)

Calculate Korean inheritance and gift tax with deductions

🏠 Jeonse vs Wolse (South Korea)

Compare Korea's unique Jeonse deposit vs monthly rent

🏢 Real Estate ROI (South Korea)

Analyze Korean property rental yield, capital gains & leverage

🏠 Housing Subscription Points (South Korea)

Calculate Korean housing subscription score and competitiveness

🏠 Rent Burden Calculator

Diagnose rent-to-income ratio affordability

🚗 Automobile

4

Analyze vehicle purchase and maintenance costs at a glance

🚗 Car Lease/Buy/Rent Compare (South Korea)

Compare total cost of buying, leasing, or renting a car in Korea

🚗 Car Insurance Estimate (South Korea)

Estimate Korean car insurance premiums by vehicle and driver

⚡ EV vs Gas Cost Comparison

Compare EV and gasoline car fuel, maintenance, and total costs

🚗 Car Depreciation Calculator

Calculate current value and depreciation by vehicle type & year

⚡ Utility & Living

9

Plan ahead by calculating everyday living expenses and budgets

⚡ Electricity Bill Calculator

Calculate KEPCO residential electricity with progressive tier rates

🚰 Water & Gas Bill Calculator

Calculate Seoul water, sewage, and city gas bills

💒 Wedding Budget Planner (South Korea)

Plan Korean wedding costs: venue, studio, gifts & honeymoon

✈️ Travel Expense Calculator

Calculate flight/hotel/food/transport totals and per-person split

💳 Subscription Cost Calculator

Track Netflix/YouTube/Music subscription totals and find waste

🧾 VAT Calculator

Reverse calculate supply price, VAT (10%), and total amount

🏡 Living Alone Cost Calculator

Calculate total initial costs for living alone

🏢 Maintenance Fee Analyzer

Monthly fee trend graph + automatic anomaly detection

✈️ Travel Budget Analyzer

Compare budget vs actual by accommodation/transport/food/activities

💪 Health Calculators

17

Easily track and manage your health metrics and wellness goals

⚖️ BMI Calculator

Calculate body mass index from height and weight

🍎 Calorie Calculator

Calculate daily calorie intake recommendations

💧 Water Intake Calculator

Calculate daily water intake based on weight and activity

🥗 Macro Calculator

Calculate protein/carb/fat ratios by diet style

🏃 Exercise Calorie Calculator

Calculate calorie burn by exercise type

👟 Step to Calorie Converter

Calculate calories, distance & time from steps

😴 Sleep Cycle Calculator

Optimal wake/sleep times based on 90min cycles

🔊 Noise Decibel Meter

Measure real-time noise levels in dB

🤰 Due Date Calculator

Calculate pregnancy week and due date

👁️ Color Vision Test

Test your color perception with 10 challenges

🔥 BMR & Body Fat Calculator

BMR (3 formulas) + body fat % + TDEE calculation

🔊 Noise Level Guide

Measure dB and compare to daily life noise levels

🚭 Quit Tracker

D-day counter with savings and health recovery timeline

🛒 Grocery List

Auto-categorize, check off & share via link

💳 Split Payment Calculator

Split payment across multiple cards

🏷️ Unit Price Compare

Compare price per 100g/ml to find the best deal

💼 Hourly Rate Converter

Convert between hourly rate and project cost

📅 Date & Time Tools

22

All the time-related tools from date calculations to world clocks

🌙 Lunar Calendar

Convert between solar and lunar calendar dates

📆 Date Calculator

Calculate date intervals and specific dates

⏰ Time Calculator

Add and subtract time

📍 D-Day Calculator

Count days until target dates

🎂 Age Calculator

Calculate age from date of birth

📅 Day of Week Calculator

What day was it? Find day of week for any date

📚 2027 CSAT D-Day (South Korea)

Countdown to Korea's College Scholastic Ability Test

🛍️ Black Friday

Check days until Black Friday sale

⏰ Pomodoro Timer

25min focus + 5min break for productivity

⏱️ Stopwatch & Timer

Accurate time measurement and timer functions

🌍 World Clock

Check current time in major cities worldwide

🌏 Time Difference Calculator

Calculate time differences between cities

🎯 Focus Timer

Flexible timer for deep work (90min focus, 50min study, 25min creative)

🌍 Timezone Meeting Planner

Find overlapping work hours between two cities

📅 Date Unit Converter

Convert days/months/years/minutes/seconds

⏱️ Presentation Timer

Section-based timer with alerts

📅 Calendar Generator

Generate monthly/yearly calendars as PNG

🌏 Jetlag Planner

Departure/arrival → jetlag adaptation sleep schedule

⏱️ Multi Timer

Run multiple timers simultaneously with cooking presets

🔄 Recurring Schedule

Generate date lists for biweekly, monthly Nth weekday patterns

📅 Korea Holidays Calendar 2026-2027

Substitute & sandwich days + smart annual leave recommendations

🌍 World Cities Weather Comparison

Click-only interface to compare real-time weather in 32 cities

🔢 Math & Unit Calculators

50

Quickly handle everyday math calculations and unit conversions

📊 Percentage Calculator

Calculate percentages, increases, and decreases

💳 Tip Calculator

Calculate tips and split bills easily

🍽️ Dutch Pay Calculator

Split bills evenly

🧾 Group Settlement Calculator

Category-based expense management with minimum transfer settlement

📊 Statistics Calculator

Calculate mean, variance, standard deviation, median, mode

📏 Unit Converter

Convert length, weight, temperature, volume, speed and more

📐 Pyeong Converter

Convert between pyeong (坪) and square meters (㎡)

➗ Fraction Calculator

Add, subtract, multiply, divide fractions

🔬 Scientific Calculator

Trigonometry, logarithms, exponents

🔢 Decimal Rounding Tool

Round, ceil, floor numbers and add thousands separators

🧮 Base Converter

Convert between binary, octal, decimal, hexadecimal

📐 Coordinate Converter

Convert Lat/Lng, UTM, Plane Rectangular coordinates

🍳 Recipe Converter

Automatically scale ingredient quantities by serving size

🍗 Air Fryer Converter

Convert oven recipes to air fryer temperature & time

🥄 Cooking Unit Converter

Convert tbsp/tsp/cup/gram/ml cooking measurements

🌡️ Oven Temperature Converter

Convert between Celsius, Fahrenheit & Gas Mark

📚 Study Time Timer

Track cumulative study time with subject stats

📍 Distance Calculator

Calculate straight-line distance between two points

⛽ Fuel Efficiency Calculator

Calculate fuel economy (km/L) and trip costs

👗 Size Converter

Convert clothing & shoe sizes between KR, US, EU, UK, JP

🎓 GPA Calculator

Calculate college grade point average (4.5/4.3 scale)

🚀 Speed · Distance · Time

Calculate speed, distance, or time from physics formulas

🎨 Paint / Tile Calculator

Estimate paint cans and tile count by area

📝 CSAT Grade Calculator

Convert CSAT scores to grades with yearly grade cut tables

🎓 GPA Simulator

Calculate required grades in remaining credits for target GPA

🚖 Taxi Fare Calculator

Estimate Regular/Deluxe/Jumbo taxi fares by distance and time

🅿️ Parking Fee Calculator

Simulate hourly parking costs and compare rates

🛋️ Room Furniture Simulator

Enter room size + drag-drop furniture placement (2D top view)

🔤 Korean Name Romanizer

Convert Korean names to passport English notation

🔢 Permutation & Combination

Calculate nPr, nCr with step-by-step solutions

🔗 GCD & LCM Calculator

Auto-calculate GCD/LCM with Euclidean algorithm

📊 Matrix Calculator

Matrix addition, multiplication, inverse & determinant

📐 Equation Solver

Solve linear & quadratic equations automatically

🔍 Prime Number Checker

Check primality, find Nth prime, factorize

📏 Shape Area/Volume Calculator

Circle, triangle, sphere, cylinder & more

👕 Laundry Symbol Guide

Decode laundry care label symbols instantly

⚛️ Interactive Periodic Table

Explore all 118 elements with detailed info

📜 History Timeline

Interactive Korean & world history timeline

🌱 Digital Carbon Footprint

Convert internet usage to CO2 emissions

👕 Laundry Guide

Washing temperature & care by fabric type

📐 Math Formulas

Search & browse math formulas collection

🔢 Binary Arithmetic

Binary add/subtract/multiply/divide & base conversion

📐 Logarithm Calculator

Common log, natural log calculation & graph

📈 Trigonometry Visualizer

Interactive sin/cos/tan graph explorer

🌀 Fibonacci Calculator

Nth Fibonacci number & Golden Ratio explorer

🔢 Tally Counter

Count inventory, people, or anything with multiple counters

🔢 Korean Number Unit

Convert numbers to 만/억/조 units (1억 2345만)

🏛️ Roman Numeral Converter

Convert Arabic ↔ Roman numerals (MMXXVI)

✏️ Number Formatter

Add commas, currency format, scientific notation

🖥️ Monitor Size Compare

Visual size comparison with PPI calculation

🧪 Tests & Tools

26

Test your typing, reaction speed, memory and more

⌨️ Typing Test

Measure typing speed (WPM) and accuracy

⚡ Reaction Test

Measure click reaction time in milliseconds

🧠 Memory Test

Number/pattern memory brain training

⚡ Internet Speed Test

Measure ping, download, and upload speed

🔋 Battery Information

Check battery status and charging info

⌨️ Keyboard Tester

Test keyboard input and shortcuts

🎮 Gamepad Tester

Test controller buttons and sticks

🖱️ Click Speed Test

Measure CPS (clicks per second)

📊 Polling Rate Tester

Measure mouse polling rate (Hz)

🎨 Color Memory Test

Simon Says-style color pattern memory game

💾 Digital Age Test

15 questions to discover your digital generation based on IT knowledge

⌨️ Keyboard Heatmap

Analyze text to visualize keyboard usage patterns as a heatmap

🧠 Brain Type Test

15 questions to discover your left-brain or right-brain tendency

🎯 Career Aptitude Test

Holland RIASEC-based aptitude test with career recommendations

😰 Stress Level Test

Self-diagnose stress with 20 questions and get management tips

🎯 Focus Test

Measure concentration with 3 mini-games

🎨 Color Sense Test

Test your ability to distinguish subtle color differences

📺 Generation Sense Test

Culture & trend quiz to find your generational vibe

💝 Love Style Test

Attachment-based dating pattern diagnosis

💰 Money Management Test

Discover your financial psychology type

🏯 Past Life Job Test

What was your Joseon Dynasty occupation?

✅ Habit Tracker

30-day challenge checklist with local save

💰 Salary Rank Test

7 questions to discover your salary tier

💸 Spending Personality Test

Flex vs Frugal - 10 scenario-based quiz

⏳ Life Progress Calculator

What % of your life have you lived?

🐿️ Spending Animal Test

Which animal matches your spending habits?

🎮 Games

51

Have fun with puzzles and interactive games

🎯 Random Picker

Spin the wheel to pick winners

🎲 Dice Roller

Roll D4, D6, D8, D12, D20 dice

🃏 Card Deck Shuffle

52-card poker deck shuffling simulator

🎰 Random Number Generator

Generate random numbers in custom range

📍 Seat Assignment

Auto-assign seats by entering names

🎯 Bingo Generator

Auto-generate 5x5 bingo boards with caller

🎰 Lotto Generator

Generate random lottery numbers

🧩 Unit Conversion Quiz

Learn unit conversions through fun quiz games

🧠 Number Memory Game

Memorize increasingly longer numbers! Test your memory

🧩 Spreadsheet Number Puzzle

Excel-style grid puzzle matching row/column target sums

🌀 Gravity Puzzle

Change gravity direction to group and clear same-colored tiles

🛡️ Grid Protocol

Cross-toggle puzzle matching sums, ON-count, and anti-streak rules

🧩 Sudoku

Classic Sudoku puzzle - unlimited generation by difficulty

🔢 2048 Game

Slide number tiles to merge and reach 2048

🏁 Maze Game

Generate random mazes & solve them

🧮 Arithmetic Quiz

Solve math problems within time limit

💣 Minesweeper

Reveal all safe cells while avoiding hidden mines

🐍 Snake Game

Grow the snake and aim for the high score

🎨 Color Match

Test your eye for subtle color differences

🇰🇷 Korean Word Quiz

Guess words from consonant hints

⚾ Number Baseball

Deduce numbers with strike & ball clues

⚫ Gomoku

Connect 5 stones in a row on 15×15 board

❌ Tic-Tac-Toe

Classic O/X game with AI opponent

🃏 Solitaire

Klondike card game with drag & drop

🧩 Block Puzzle

Place blocks on 10x10 board to complete lines

🔢 Nonogram

Logic puzzle - reveal pictures with number clues

💡 Lights Out

Click lights to toggle them and turn all off

🧩 15 Puzzle

Slide tiles to arrange numbers in order

🗼 Tower of Hanoi

Classic disc-moving puzzle game

⚫ Reversi (Othello)

Black & white disc-flipping strategy game vs AI

🚀 Asteroids

Classic space shooter - destroy asteroids with your ship

🧱 Breakout

Classic brick breaker arcade game with power-ups

🚀 Space Flight

Fly through asteroid fields collecting stars - addictive arcade

🎵 Rhythm Follow

Listen to beat patterns and replicate them - test your rhythm

🎹 Rhythm Tiles

Tap falling tiles to the beat - music arcade game

🏃 Dodge Game

Dodge falling obstacles and survive as long as you can

🏰 Tower Defense

Place towers to defend against 10 waves of enemies

✖️ Multiplication Practice

Gamified times table trainer with combos & stars

🌍 World Map Quiz

Guess country locations on the world map

🪜 Ladder Game

Enter participants and draw animated ladders

🚫 Forbidden Word Game

Generate taboo word sets for party games

🏆 Ideal World Cup Maker

Create & play your own tournament

🔓 Escape Room Puzzle

Create & share online escape rooms

⭕ Perfect Circle Drawing

Draw a circle and measure its accuracy

⏱️ One Second Challenge

Try to stop exactly at 1 second without a timer

🎨 Color Mixing Quiz

Guess the result of mixing paint colors

⚔️ Day RPG

Transform daily activities into RPG quests + level up

📊 Algorithm Visualizer

Sorting algorithm animation step by step

🏗️ Stack Tower

Stack blocks with perfect timing

🔍 Word Search

Find hidden words in a letter grid puzzle

🏃 Endless Runner

Auto-scroll + jump/slide obstacle runner game

💻 Developer Tools

26

Essential conversion, generation, and validation tools for developers

🔐 Base64 & URL Encoder/Decoder

Base64 and URL encoding/decoding tool

🔍 Regex Tester

Test regular expression patterns and view match results

🎯 Regex Cheatsheet

Common regular expression patterns collection

🔗 URL Parser Tool

Extract domain, path, query, and UTM parameters from URLs

🕒 Time Format Converter

Convert between 12/24h, Unix Timestamp, ISO 8601 formats

🔄 CSV JSON Converter

Easily convert between CSV and JSON formats

📄 JSON Formatter

Format, minify, validate, and sort JSON

🔑 UUID Generator

Generate and validate UUID v4/v1 identifiers

🔤 Unicode Converter

Convert between text and Unicode/HTML entities

🔑 JWT Decoder

Decode and verify JWT tokens

🖥️ Browser/Device Info

User-Agent parsing, screen resolution, browser info

🔣 Image to Base64

Encode images to Base64 strings

📝 Lorem Ipsum Generator

Generate dummy text (paragraphs/sentences/words)

⏰ Cron Expression Generator

Generate crontab schedule expressions

🗃️ SQL Formatter

Format and beautify SQL queries

🌐 IP Address Lookup

Instantly check your public IP and geolocation

🔗 UTM Link Builder

Generate UTM parameter URLs for campaign tracking

🔤 HTML Entity Converter

Encode/decode HTML special character entities

⏱️ Unix Timestamp Converter

Unix timestamp↔date/time conversion

🔄 YAML/JSON/TOML Converter

Freely convert between YAML, JSON, and TOML formats

📡 HTTP Status Codes

Complete HTTP status code reference with descriptions

📗 Excel Function Dictionary

Search 63 Excel functions with syntax, examples & bookmarks

🔍 JSON Diff

Semantic comparison of two JSON documents

⌨️ Keyboard Shortcuts

Search shortcuts by OS & app

🔍 Regex Visualizer

Regex pattern analysis & real-time match testing

📊 Flowchart Generator

Generate flowcharts from text and export as PNG/SVG

🎨 Design & CSS Tools

16

Visual tools for web design, CSS work, and creative projects

🎨 Color Code Converter

Convert HEX, RGB, HSL color codes in real-time

🎨 Gradient Generator

Visually create CSS gradients and copy code

🌑 Shadow Generator

Visual CSS box-shadow/text-shadow creator

⭕ Border Radius Generator

Visual CSS border-radius adjuster

🎨 Tailwind CSS Color Generator

Auto-generate Tailwind color palettes

📐 CSS Flexbox Generator

Visual Flexbox code generator

🌈 CSS Animation Generator

Create keyframe animations

📱 Responsive Viewport Simulator

Test on various screen sizes

📐 Aspect Ratio Calculator

Calculate and convert image/video ratios

📏 Pixels to Inches

Convert between pixels and inches by DPI

✂️ CSS Clip-Path Generator

Visually edit clipping paths with drag controls

⏱️ Cubic Bezier Generator

Visualize animation timing functions

🎨 Color Palette Generator

Auto-recommend harmonious color combinations

🔲 Pattern Generator

Generate repeating pattern SVG/PNG downloads

🔤 Font Preview

Compare and preview web fonts in real-time

✏️ SVG Editor

Simple SVG drawing & editing tool

📝 Text & Document Tools

28

Analyze, convert, and process text and documents effortlessly

📝 Text Analyzer

Real-time character, word, paragraph, and sentence counter

🔤 Text Formatter

Convert case, sort, remove duplicates, replace characters

📋 Text Diff Tool

Compare two texts and highlight added/deleted changes

✨ Text Decorator

Transform text with special character styles

📝 Markdown Preview

Markdown to HTML conversion preview

📊 Excel Viewer

View Excel files directly in browser

🔢 Number to Words Converter

Read numbers in Korean/English (check writing, amounts)

📝 Page Count Converter

Convert character count to A4 pages (10pt, 11pt, report)

🎙️ Speech to Text (STT)

Real-time voice recognition to text

🔊 Text to Speech (TTS)

Read text aloud with natural voices

📝 OCR Result Cleanup

Normalize line breaks, whitespace, and special characters

📇 Business Card to vCard

Extract name/phone/email from business card photos, save as vCard

😀 Emoji Search & Copy

Search emojis & copy with one click

📡 Morse Code Converter

Text↔Morse code conversion with sound playback

🇰🇷 Korean Chosung Extractor

Extract Korean initial consonants & quiz game

📖 Reading Speed Calculator

Measure reading speed & estimate book completion time

📄 Resume Builder

Create professional resumes with 4 templates & PDF download

🧠 Mind Map

Create beautiful mind maps with 4 themes & PNG export

✏️ Character Counter

Real-time character, word, byte count with/without spaces

✏️ Spell Checker

Rule-based Korean spelling checker

📝 Resume Keyword Analyzer

Keyword frequency analysis & ATS optimization tips

📝 Writing Style Analyzer

Analyze writing style, vocabulary diversity, readability score

✍️ Writing Goal Tracker

Set writing goals & track real-time progress

✍️ Digital Signature Maker

Draw signature with mouse/touch → download as transparent PNG

📝 Online Notepad

Auto-saving browser notepad with multiple tabs

🏦 Check Amount Converter

Convert amounts to Chinese characters (壹貳參)

🔤 Number to English

Read numbers in English (one thousand two hundred)

⠿ Korean Braille Converter

Convert Hangul ↔ Braille (Korean Braille system)

🔐 Security Tools

4

Strengthen your security with password generation and data validation

🔐 Password Generator

Generate secure passwords and check strength

🔒 Password Strength Checker

Analyze password security strength

✉️ Email Validator

Validate email format and validity

🔐 Hash Generator

Generate MD5, SHA256 and other hashes

📱 QR/Barcode

5

Create and scan QR codes and barcodes with ease

📱 Barcode/QR Code Generator

Easily generate and download barcodes and QR codes

📱 QR Code Reader

Scan and decode QR codes

📱 QR Code Design

Custom QR code with logo & colors

📋 QR Menu Maker

Free digital menu for cafes & restaurants

📶 WiFi QR Generator

Create QR codes for WiFi network sharing

🖼️ Image Tools

36

Resize, edit, convert, and enhance your images in one place

📐 Image Resizer

Easily resize photos by pixels or percentage

🗜️ Image Compressor

Reduce image file size for web optimization

🔄 Image Format Converter

Convert between JPG, PNG, WebP, GIF formats

🔍 AI Image Upscaler

Upscale images 2x/4x with Lanczos algorithm

🎨 Image Filter

Apply grayscale, sepia, brightness, contrast and more

🔄 Image Rotate/Flip

Rotate images 90°, 180°, 270° or flip horizontally/vertically

💧 Add Watermark

Add text watermarks to protect your images

📄 Image Text Extraction (OCR)

Extract text from images automatically (Korean/English/Japanese)

🎨 AI Style Transfer

Transform photos into oil painting, watercolor, pop art styles

🗺️ AI Depth Estimation

Generate 3D depth maps, visually distinguish near and far objects

✂️ Background Remover

Remove image background to make it transparent

📷 EXIF Viewer/Remover

View photo metadata and remove for privacy

🎬 GIF Maker

Create animated GIF from multiple images

🎨 Icon Generator

Convert images to various favicon/app icon sizes

🔲 Mosaic/Blur

Apply mosaic or blur effect to image areas

✂️ Image Crop

Crop images to desired size and ratio

🔗 Image Merge

Combine multiple images horizontally or vertically

📸 Screenshot Beautifier

Add beautiful backgrounds and frames to screenshots

🖍️ Coloring Page Converter

Convert photos to coloring pages by extracting outlines

🎨 Canvas Drawing

Online drawing tool - brushes, shapes, and text

⏩ GIF Speed Controller

Adjust GIF animation playback speed

✍️ Handwriting Converter

Convert text to handwritten style images

📷 Document Scanner

Scan documents with camera and apply filters

📸 ID Photo Maker

Create passport/resume photos with background change

😂 Meme Generator

Add text to images to create memes

🎨 Image Color Extractor

Extract color palettes from photos automatically

🖼️ Photo Collage

Combine multiple photos into one collage

⭐ Sticker Maker

Create custom stickers from your photos

👾 Pixel Art Converter

Convert photos into retro pixel art

🔄 AI Photo Restorer

Restore old/damaged photos with AI automatically

🖼️ Lorem Pixel

Placeholder dummy image generator

🎬 GIF Text Generator

Add text overlay with animation to images

🌐 Favicon Generator

Convert image to favicon.ico

📸 Resume Photo Resizer

Resize ID photos (3x4, passport, visa)

💬 Fake Chat Generator

Create fake chat images for memes

🖼️ Instagram Carousel Splitter

Auto-split long images into up to 10 slides

📄 PDF Tools

6

All-in-one tools to view, edit, merge, and convert PDF files

📄 PDF Viewer

View PDF files directly in browser

📎 PDF Merge

Combine multiple PDF files into one

✂️ PDF Split

Split PDF pages and extract

🗜️ PDF Compress

Reduce PDF file size

🖼️ PDF to Image

Convert PDF to PNG/JPEG images

📊 PDF/Receipt Table Extractor

Extract tables from PDFs, receipts, and documents to CSV/JSON

🎵 Music Tools

7

Helpful music tools for practice, learning, and performance

🎵 Metronome

Online metronome with adjustable BPM

🥁 BPM Counter

Tap to measure music BPM

🎹 Note Frequency Calculator

Musical note Hz frequency chart

🔊 White Noise Mixer

Mix rain, ocean, cafe sounds for focus and relaxation

🎧 Typing Sound ASMR

Play various ASMR sounds while typing

🎹 Virtual Piano

Play piano with keyboard, record and playback

🥁 Drum Machine

16-step beat sequencer with drum loop maker

🎲 Fun & Fortune

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Enjoy fortune telling, compatibility tests, and other fun content

🎮 Nickname Generator

Generate fun nicknames for games and social media

💕 Name Compatibility Test

Check compatibility score by names

🐉 Zodiac Compatibility

Fun compatibility test based on Korean 12-tti zodiac

📛 Name Generator & Hanja

Korean name analysis with Hanja meanings & stroke fortune

🔍 Name Analyzer

Predict age, gender & nationality from any name using AI stats

🍸 Cocktail Recipe

Search cocktail recipes by name or ingredient

🍳 Meal Recipe

Search meal recipes by name or ingredient

🧠 Trivia Quiz

Test your knowledge across categories and difficulty levels

🔮 Saju Analyzer

Four Pillars of Destiny analysis from birth date & time

🌙 Dream Interpretation

Search traditional dream meanings by keyword

🤖 AI Face Analysis

AI analyzes face symmetry, shape, golden ratio & physiognomy

🐾 AI Animal Face Type

AI analyzes your face to find your animal doppelganger

🔮 Face Reading

Traditional physiognomy-based personality & fortune analysis

🃏 Tarot Card Reading

22 Major Arcana tarot reading

⏱️ Life Timer

See heartbeats, breaths, blinks and more in real-time

🩸 Blood Type Compatibility

Check love, friendship & work compatibility by blood type

⭐ Horoscope

Check today's horoscope and lucky info for 12 zodiac signs

🎨 ASCII Art Converter

Convert text to various ASCII art styles

👥 Team Divider

Randomly divide people into 2-10 teams fairly

⚖️ Balance Game

This or That! Fun choice game

💞 MBTI Compatibility

Compatibility analysis between 16 MBTI types

💕 Advanced Name Compatibility

Stroke count, consonant & phonetic harmony analysis

🔮 Daily Fortune

Birth date based comprehensive fortune reading

🧪 Psychology Tests

5 psychology tests: color, stress, love language & more

💸 Spending Type Test

Analyze monthly spending to find your spending personality

📊 Name Statistics

Surname ranking, popularity estimation, stroke analysis

🎨 Color Psychology Test

Discover your personality type by picking 3 favorite colors

🌈 Personal Color Test

Find your color season via quiz or photo analysis

🗳️ Poll Maker

Create simple polls and surveys with instant results

💬 Quote Generator

Inspirational quotes by category with image card download

漢 Hanja Name Finder

Find Chinese characters for Korean names with meanings

🍗 Food Compatibility Test

Chicken+Beer vs Pizza+Cola food pairing

✨ Neologism Generator

Create fun new words by combining words

🌦️ Emotion Weather

Choose an emotion and see matching weather animation

🎨 Today's Color

Generate a unique color from your name and date

⭐ My Name Constellation

Transform your name into a constellation in the night sky

🍽️ Random Food Picker

Can't decide what to eat? Spin the roulette!

📊 Life Stats Card

Visualize your life in numbers - days, heartbeats & more

💬 Quote Card Generator

Enter a name → generate a plausible quote card image

👾 Dot Avatar Generator

Mix parts to create your own 8-bit pixel character

👶 Baby Face Score Test

Measure your youthful face index with 15 questions

📱 Phone Overdependence Test

Measure smartphone overdependence via usage & 20 questions

💔 Relationship Slump Test

Duration + 20 pattern questions to gauge slump index

✂️ Friend Cutoff Checklist

20-item friendship health check + cutoff index

🏆 LoL Rank Promotion Simulator

Predict games to next tier via win rate/LP/MMR

🌱 Zero-Waste Score Test

20 eco-habits checklist + 5-tier diagnosis

🎯 Goal Deadline Calculator

Target × per-session × frequency → D-Day + milestones

🕰️ Life in Weeks Visualization

Visualize 80-year life as 4,160-cell weekly grid

🗣️ Korean Name Pronunciation Guide

Korean name → IPA, Romanization, English sound approximation

🎲 Random Daily Challenge

Daily challenges in 6 categories (Health/Social/Savings/Creativity/Env/Growth)

🐾 Pets

3

Calculate your pet's age, food amount, and other pet care essentials

🐕 Dog Age Calculator

Convert dog years to human years by breed size

🐈 Cat Age Calculator

Convert cat years to human years (indoor/outdoor)

🥣 Pet Food Calculator

Calculate daily food amount for dogs & cats by weight & activity

👟 Fashion & Size

4

Convert shoe and clothing sizes across international standards

👟 Shoe Size Converter

Convert shoe sizes between KR, US, EU, UK, and JP

👔 Clothing Size Converter

Convert clothing sizes between KR, US, EU, UK, JP, and CN

💍 Ring Size Guide

Measure and convert ring sizes across KR, US, EU, UK, and JP

👗 Size Converter

Convert clothing & shoe sizes between KR, US, EU, UK, JP

Health-related calculators are for informational purposes only and do not constitute medical advice. Always consult a qualified healthcare professional.

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