Free Online Converters
Instant converters that keep every format in sync as you type. Convert length, weight, and temperature between metric and imperial; translate colors between HEX, RGB, and HSL; and move numbers between binary, octal, decimal, and hexadecimal with arbitrary precision. For developers and remote teams there's a Unix timestamp converter (seconds or milliseconds, UTC and local), a world clock and time-zone converter with daylight saving handled automatically, and a CSV ↔ JSON converter that copes with quoted fields, embedded commas, and nested objects. Everything converts on your device the moment you type — no upload, no server, no waiting.
- Unit ConverterLength, weight, and temperature units.
- Number Base ConverterBinary, octal, decimal, hex.
- Color Converter (HEX / RGB / HSL)Convert colors between HEX, RGB, HSL.
- Unix Timestamp ConverterConvert Unix time ↔ human dates.
- World Clock & Time Zone ConverterCurrent time across time zones.
- CSV ↔ JSON ConverterConvert CSV to JSON and JSON to CSV.
- YAML ↔ JSON ConverterConvert YAML to JSON and JSON to YAML.
- Image to Base64 ConverterTurn an image into a Base64 data URI.
- WCAG Contrast CheckerCheck text contrast against WCAG AA/AAA.
- PX to REM ConverterConvert px ↔ rem at any root size.