Converter Tools
Convert units, numbers, text and data formats instantly.
Temperature Converter
Live Celsius, Fahrenheit and Kelvin conversion.
Length Converter
Convert between metric and imperial length units.
Weight Converter
Convert kg, g, tonnes, lb, oz and stone.
Area Converter
Convert m², ft², yd², acres and hectares.
Volume Converter
Convert liters and common US liquid volume units.
Speed Converter
Convert km/h, mph, m/s, knots and ft/s.
Byte Converter
Convert decimal KB/MB/GB and binary KiB/MiB/GiB.
Number Base Converter
Convert large integers across binary, octal, decimal and hexadecimal.
Roman Numeral Converter
Convert and validate canonical Roman numerals from 1–3999.
Binary Text Converter
Convert UTF-8 text and validated 8-bit binary bytes.
Color Converter
Convert between HEX, RGB and HSL in either direction.
JSON to CSV
Convert JSON to CSV.
CSV to JSON
Convert CSV to JSON.
Base64 Encoder / Decoder
Encode and decode Base64.
Excel to CSV
Convert XLSX/XLS worksheets to CSV.
CSV to Excel
Turn CSV into XLSX.
Excel to JSON
Convert spreadsheet rows to JSON.
JSON to Excel
Turn JSON objects into XLSX.
Timezone Converter
Convert the same moment between named IANA time zones.
CSS Unit Converter
Convert px, rem, em, vw, vh and percent with explicit context.
Unit and data conversion tools
Convert measurement units, numeric bases, colors, text encodings and structured data formats from one browser-based collection.
Metric, imperial and data formats
Use the unit converters for everyday measurement changes, or switch to the spreadsheet and JSON tools for CSV, Excel and structured-data workflows.