SQL / XML / HTML / CSS formatter

Explain a cron expression in plain English and list its next run times in any time zone.

Convert Unix timestamps (s, ms, µs, ns) to dates and back, across time zones and formats.

Convert a meeting time between zones, with working-hours flags. Knows every IANA zone and DST rule.

Convert between HEX, RGB, HSL and OKLCH, build tints and shades, and check WCAG contrast.