Timestamp Converter
Convert between Unix timestamp and ISO 8601 - fully client-side
Current Time
Unix (seconds)
1791750737
Unix (ms)
1791750737700
ISO 8601
2026-10-11T20:32:17.700Z
10/11/2026, 11:32:17 PM (Europe/Istanbul)
Converter
Seconds or milliseconds
ISO 8601 or any parseable date format
What this tool does
Converts between Unix timestamps (seconds or milliseconds) and human-readable ISO 8601 dates in multiple timezones. Shows relative time (5 minutes ago, in 3 hours). Fully client-side.
Who it's for: Developers reading database timestamps, sysadmins parsing log times, and anyone debugging timezone issues.
When to use
- •Decode a Unix timestamp from a database into a human-readable date.
- •Generate the current timestamp in the format your API expects.
- •Convert a log timestamp from UTC to your local timezone.
- •Check when a JWT's exp claim will fire.
How it works
- 1Paste a timestamp (seconds or ms) or a date string.
- 2Tool auto-detects format and converts both directions.
- 3Multiple timezones are shown side-by-side.
- 4Current time updates in real time.
Tips
- •Unix timestamps are seconds since 1970-01-01 UTC - milliseconds in JavaScript.
- •ISO 8601 is the only unambiguous date format for APIs.
- •Always store UTC and convert to user's timezone at display time.