Converters (10)
Turn one format into another without leaving the browser: measurements, time, numeric bases, config formats and CSS units.
Unit Converter
Convert length, mass, volume, and time.
Timestamp Converter
Convert between Unix timestamps and ISO 8601 dates with relative time.
YAML ↔ JSON
Convert between YAML and JSON with error reporting.
Number Base Converter
Convert numbers between binary, octal, decimal, and hex.
Timezone Converter
See any datetime across major world timezones side-by-side.
Binary ↔ Text
Convert text to binary (8-bit) and back with instant preview.
Roman Numeral Converter
Convert between Arabic numbers (1–3999) and Roman numerals.
Meeting Time Finder
Find overlapping business hours across multiple countries and timezones — no signups, works entirely in your browser.
CSV ↔ JSON Converter
Convert CSV to JSON and JSON arrays back to CSV with header detection and download.
CSS Unit Converter
Convert px, rem, em, pt and % with configurable root and parent font sizes.