Your input never leaves the device
Encoding, hashing and text tools run entirely client-side, so sensitive strings never reach a server log.
Converters & Generators
Units, number bases, encodings and text processing in one place.
Tools to replace the conversions you keep retyping into a search box. Everything computes in the browser, so nothing you paste leaves your device.
Tools
Ready-to-use tools in this categoryWhat Is My IP
Check your current public IP address and network information.
Cycle Tracker
A period and ovulation tracker that stores everything on your own device โ no sign-up, nothing sent anywhere.
QR Code Generator
Turn any URL or text into a QR code instantly.
Life Data Card
Your age, zodiac animal and star sign gathered into one card.
JSON Formatter
Format, indent and validate JSON in the browser.
Password Generator
Generate strong random passwords with configurable length and character sets.
Age Calculator
Calculate your exact age in years, months and days from your birth date.
Dog Age Calculator
Convert your dog's age into human years, adjusted for breed size.
Size Converter
Convert clothing and shoe sizes between Korean, US, European and Japanese systems.
Color Palette Picker
Build and preview color palettes for your design.
Base64 Encoder / Decoder
Convert text to Base64 and back without leaving your browser.
Unicode Explorer
Look up Unicode characters and their code points.
Pixel Cipher
Hide a short message inside an image-style pixel cipher.
Password Strength Meter
Measure how resistant a password is to guessing and brute force.
Character Counter
Count characters, words, sentences and bytes as you type.
BMI Calculator
Calculate body mass index from height and weight and see the standard ranges.
Palette Generator
Generate harmonious color schemes from a base color.
Calorie Calculator
Estimate daily calorie needs from your body metrics and activity level.
Color Code Converter
Convert colors between HEX, RGB, HSL and other formats.
Pregnancy Due Date Calculator
Estimate the due date and current week of pregnancy.
GPA Calculator
Calculate grade point average from course credits and grades.
GCD & LCM Calculator
Find the greatest common divisor and least common multiple of any numbers.
Roman Numeral Converter
Convert between Roman numerals and Arabic numbers.
Regex Tester
Test regular expressions against sample text with live match highlighting.
Text Case Converter
Switch text between upper, lower, title, camel and snake case.
Zodiac & Star Sign Finder
Find your zodiac animal and star sign from your birth date.
Cooking Measurement Converter
Convert cups, tablespoons, teaspoons, millilitres and litres for recipes.
Running Pace Calculator
Calculate pace from distance and time, with projected 5K, 10K, half and full marathon times.
Word Frequency Analyzer
Paste text to see which words appear most often, ranked by count.
Age Difference Calculator
Find the precise age gap between two people from their birth dates.
Upside Down Text Generator
Flip English text into upside-down Unicode characters.
Palindrome Checker
Check instantly whether a phrase reads the same backwards.
Caffeine Tracker
Add today's drinks to total your caffeine intake against daily guidance.
Number Base Converter
Convert between binary, octal, decimal and hexadecimal at once.
Temperature Converter
Convert instantly between Celsius, Fahrenheit and Kelvin.
Bitwise Calculator
Compute AND, OR, XOR, NOT and shifts with the binary result shown visually.
URL Encoder / Decoder
Percent-encode text for URLs or decode it back, instantly.
Area Calculator
Calculate area and perimeter for circles, squares, rectangles, triangles and trapezoids.
Data Size Converter
Convert bits, bytes, KB, MB, GB, TB and PB in one place.
Speed Converter
Convert km/h, m/s, mph and knots in one place.
Daily Quote
A short motivational line for today, plus more at the press of a button.
Download Time Calculator
Estimate how long a download takes from file size and connection speed.
Morse Code Translator
Translate text to Morse code and back, with audio playback.
Text Diff Checker
Compare two texts line by line and see exactly what was added or removed.
Weight Converter
Convert grams, kilograms, pounds and ounces alongside traditional Korean units.
Concepts worth knowing
Units depend on the convention
Data sizes differ between 1024-based and 1000-based conventions, network speed is measured in bits while file size is in bytes. Each tool states which convention it uses.
Key terms
- Base64
- Encoding that carries binary data safely through text channels.
- Percent encoding
- Replacing URL-unsafe characters with %XX sequences.
- Number base
- The radix used to write numbers โ binary, octal, decimal, hexadecimal.
Frequently asked questions
Is my text stored on a server?
No. All conversions run locally in your browser.
Can it handle large input?
Within browser memory limits, yes, though very large files may slow the tab.