Converters
Translate colors and values without losing the thread.
Color Converter
Translate HEX colors into RGB and HSL with a live visual preview.
Number Base Converter
Convert signed integers between bases 2–36 with arbitrary-precision arithmetic.
RGB to HEX
Convert opaque RGB color channels into a six-digit hexadecimal color.
HSL to HEX
Convert hue, saturation, and lightness into an opaque hexadecimal color.
Length Converter
Convert metric and imperial lengths through exact meter-based factors.
Weight Converter
Convert mass units including grams, kilograms, ounces, pounds, and stones.
Temperature Converter
Convert Celsius, Fahrenheit, and Kelvin while rejecting temperatures below absolute zero.
Data Size Converter
Convert decimal SI and binary IEC data-size units without mixing their factors.
Aspect Ratio Calculator
Simplify width-to-height ratios and scale one dimension proportionally.
PX / REM Converter
Convert pixels and root-relative rem units using a configurable root font size.
Angle Converter
Convert degrees, radians, gradians, and turns using a common angular reference.
Roman Numeral Converter
Convert canonical Roman numerals and integers from 1 to 3999.
YAML / TOML Converter
Convert YAML and TOML configuration documents in either direction.
JSON / TOML Converter
Convert JSON objects and TOML documents in either direction.