UtilArk
Универсальные утилиты в браузере
Codec (Encoder / Decoder)
Encode and decode text in Base64, Base64URL, Base32, Hex, and ASCII85
URL Encoder / Decoder
Encode or decode URL strings
Data Format Converter
Convert and validate between JSON, YAML, TOML, XML, INI, and Properties formats
UUID Generator
Generate random UUID (v4)
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text
Unix Timestamp Converter
Convert between Unix timestamps and dates
JWT Encoder / Decoder
Encode or decode JWT tokens
Password Generator
Generate secure random passwords
Number Base Converter
Convert between binary, octal, decimal, hexadecimal and more
Color Code Converter
Convert between HEX, RGB, and HSL color codes
Regex Tester
Test regular expressions with real-time matching
Image Format Converter
Convert between PNG, JPG, and WebP image formats
Image Compressor
Reduce image file size by adjusting quality. Supports batch compression.
QR Code Generator
Generate QR codes from text or URLs
Unit Converter
Convert between length, weight, temperature, area, speed, and data size units
Lorem Ipsum Generator
Generate placeholder text
Percentage Calculator
Perform common percentage calculations
Lunar Calendar Converter
Convert between solar (Gregorian) and Korean lunar calendar dates
Age Calculator
Calculate Korean age and international age from birth date
Placeholder Image Generator
Generate placeholder images with custom size, color, and text
Image Resizer
Resize images to custom dimensions
Image Cropper
Crop images by dragging or entering coordinates
Zalgo Text Generator
Convert text into Zalgo (glitch) text
Case Converter
Convert text between camelCase, PascalCase, snake_case, and more — all at once
Image to ASCII Art
Convert images into ASCII character art
File Zip / Unzip
Compress files into ZIP, GZIP, or TAR.GZ archives, or decompress them back to individual files. All processing happens in your browser.
Timezone Converter
Convert date and time between different timezones
Character Counter
Count characters, words, lines, and more in real time
Text Diff
Compare two texts and highlight differences line by line
Calculator
Evaluate math expressions with functions and constants
D-Day Calculator
Calculate days remaining until a target date or days elapsed since a past date
Auspicious Days Calendar
Find auspicious days (Son-eomneun-nal) based on the Korean lunar calendar for moving, weddings, and more
Stopwatch / Timer
Stopwatch with lap times and countdown timer
Big Five Personality Test
IPIP Big Five 50-item personality test (public domain)
Reaction Time Test
Click as fast as you can when the screen turns green. Measures your reaction speed.
Color Vision Test
Find the tile with a slightly different color. Gets harder each level.
Tone Generator
Generate sound at a specified frequency
Audio Recorder
Record audio directly in your browser and download
Webcam & Mic Test
Check if your camera and microphone are working properly
BMI Calculator
Calculate your Body Mass Index (BMI)
AUDIT Alcohol Screening
WHO Alcohol Use Disorders Identification Test (10 questions)
Guitar / Ukulele Tuner
Detect pitch from your microphone to help tune guitar, ukulele, and more
Metronome
Set BPM and keep the beat
Screen Resolution / DPI
Check your screen resolution, DPI, and browser info
Pomodoro Timer
Boost productivity with 25-min focus + 5-min break cycles
Color Palette Generator
Generate complementary, analogous, triadic, and more palettes from a base color
Morse Code Translator
Convert text to Morse code and vice versa
Memory Test
Remember and repeat color patterns. Simon Game style.
Markdown Preview
Preview Markdown in real-time
Internet Speed Test
Measure download speed and latency
Color Sense Test
Arrange gradient tiles in the correct order
Random Picker
Randomly pick items from a list
Calorie Calculator
Calculate daily recommended calories and macros based on TDEE
Dice Roller
Roll D4, D6, D8, D10, D12, D20, D100 dice
Cron Expression Generator
Visually build cron expressions and check next execution times
QR Business Card
Enter your contact info to generate a vCard QR code
My IP Address
Check your public IP address and location info
Compound Interest Calculator
Calculate future value with initial principal and monthly contributions
Loan Repayment Calculator
Calculate loan repayment schedule with equal payment or equal principal
Savings Interest Calculator
Calculate interest on deposits and installment savings
Discount Calculator
Calculate discount price, rate, or original price
Tip Calculator
Calculate tip amount and split per person
Rule of 72 Calculator
Estimate how long for an investment to double
Генератор Фавиконов
Загрузите изображение и создайте фавиконы разных размеров
Тест Слуха
Проверьте слух на разных частотах для каждого уха
Озвучка Текста
Преобразуйте текст в речь с помощью голосов браузера
Тест Скорости Печати
Проверьте скорость и точность печати
Инструменты PDF
Объединение нескольких PDF или разделение страниц PDF