Timestamp Converter
A Unix timestamp counts seconds (or milliseconds) since January 1, 1970 UTC — the standard way computers store points in time, but not human-readable. This tool converts between a timestamp and a readable date in any timezone, in both directions, instantly.
Date/time → Unix timestamp
How to use
- Paste a Unix timestamp (seconds or milliseconds) to see the readable date, or click "Now".
- Pick a timezone to see that same instant displayed there.
- Or pick a date/time below to get its Unix timestamp instead.
- Everything runs in your browser — no data is sent anywhere.
FAQ
Seconds or milliseconds — how do I know which one I have?
A 10-digit number (e.g. 1735689600) is seconds; a 13-digit number (e.g. 1735689600000) is milliseconds. This tool detects which one automatically.
Why does a timestamp represent different local times in different timezones?
A Unix timestamp is a single, unambiguous point in time (always UTC internally) — "timezone" only affects how that instant is *displayed*, e.g. as a local wall-clock time.
Is a Unix timestamp affected by daylight saving time?
No — the timestamp itself never changes. Only the human-readable representation in a DST-observing timezone shifts by an hour depending on the time of year.