Converters & Calculators
20 tools — free, private, runs in your browser
Unix timestamp, date-time, number base, color, case, temperature, NATO alphabet, binary, and unicode converters. Plus math, ETA, and percentage calculators.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates. Live clock with seconds-since counter and current time in both formats.
Date-Time Converter
Convert dates and times between different formats and timezones.
Integer Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal.
Roman Numerals
Convert between Roman numerals and Arabic numbers.
Color Converter
Convert colors between HEX, RGB, HSL, and other formats.
Case Converter
Convert text between different cases (camelCase, snake_case, etc.).
Text to NATO
Convert text to NATO phonetic alphabet.
Text to Binary
Convert text to binary and vice versa.
Text to Unicode Converter
Convert text to Unicode code points and HTML entities.
Temperature
Convert temperatures between Celsius, Fahrenheit, Kelvin, and Rankine.
Math Evaluator
Evaluate mathematical expressions.
ETA Calculator
Calculate estimated time of arrival.
Percentage Calculator
Calculate percentages, increases, and decreases.
Chronometer
chronometer - free, privacy-first, and 100% client-side.
Quantum Circuit Simulator
Design and simulate quantum circuits with real quantum gates. Perfect for learning quantum computing concepts.
Lorem Ipsum Generator
Generate placeholder text for designs.
Emoji Picker
Browse and copy emojis.
ASCII Art
Convert text to ASCII art.
Numeronym Generator
numeronym-generator - free, privacy-first, and 100% client-side.
Keycode Info
Find keyboard keycodes for JavaScript events.