Converters
JSON, Base64, URL, color, units — robust converters that just work.
JSON Formatter
Format, validate and minify JSON.
URL Encoder / Decoder
Percent-encode or decode URLs and query strings.
Base64 Encoder / Decoder
Encode and decode Base64 strings.
Color Converter
Convert between HEX, RGB and HSL color values.
CSV to JSON
Convert any CSV table to a JSON array of objects.
HTML Entities Encoder
Encode and decode HTML entities safely.
Number Base Converter
Binary, octal, decimal and hex — all at once.
Length Unit Converter
mm, cm, m, km, in, ft, yd, mi.
Temperature Converter
Celsius, Fahrenheit and Kelvin.
Unix Timestamp Converter
Convert between Unix time and human dates.
Markdown to HTML
Convert Markdown to clean HTML with preview.
Morse Code Translator
Text ↔ Morse code, both ways.
Weight Unit Converter
kg, g, lb, oz, ton — instantly.
Speed Unit Converter
km/h, mph, m/s, knots and ft/s.
Area Unit Converter
sqm, sqft, acre, hectare and more.
Volume Unit Converter
Liters, gallons, cups and pints.
YAML to JSON
Convert simple YAML configs to JSON.
Roman Numeral Converter
Convert numbers to Roman numerals and back.
JSON to CSV
Flatten any JSON array into a CSV table.
CM to Inches Converter
Centimetres to inches and feet+inches.
Kg to Lbs Converter
Kilograms to pounds and stone.
Miles to Km Converter
Imperial miles to metric kilometres.
Number to Words Converter
Spell out any number in English words.
Unicode Escape Converter
Escape / unescape Unicode characters.
IBAN Formatter & Validator
Format and validate any IBAN.
Credit Card Formatter & Luhn Check
Format card number, detect brand, validate Luhn.
Text to Base64 Converter
Encode text to standard and URL-safe Base64.