Category
Date & Time
Convert and inspect dates, times, epochs, and time zones.
Duration Unit Converter
Convert a length of time between nanoseconds, milliseconds, seconds, minutes, hours, days, and weeks.
Human-readable Duration
Turn a number of seconds into "1d 2h 3m" and back, and parse free-form durations like "1h30m" or "1:23:45" into seconds.
ISO 8601 Date Converter
Expand any date or timestamp into ISO 8601 forms — canonical UTC, basic format, week date, ordinal date — plus its calendar breakdown.
Timezone Converter
Convert a wall-clock time from one IANA timezone to several others, with correct DST offsets, abbreviations, and day rollover.
Unix Timestamp Converter
Convert Unix seconds, Unix milliseconds, and ISO 8601 timestamps with UTC, local time, relative time, and calendar breakdown.