Date & Time

Timestamp Converter

Convert Unix seconds or milliseconds and ISO 8601 into local, UTC and relative time.

Runs entirely in your browser: nothing you paste or upload is sent to a server.

Related: unix, timestamp, epoch, iso 8601, date, time, utc, milliseconds, convert

More date & time

• Date Difference — Calendar-aware duration between two dates, plus add or subtract durations.
• Time Zone Converter — Convert a moment across IANA time zones with offsets and DST awareness.
• Date Formatter — Render a date as ISO, RFC 3339, RFC 2822, custom patterns or relative time.
• Cron Expressions — Explain cron schedules in plain English and list the next run times.