Unix Timestamp Converter

Enter a Unix timestamp (seconds or milliseconds) or a date — get every representation back. Seconds vs. milliseconds is detected automatically.

Input timestamp or date

Output all formats

Status Waiting for input Unix (s) — Your zone — Input type —

What this tool does

A Unix timestamp counts the seconds (or milliseconds) since 1 January 1970 UTC — the "epoch". This converter reads a timestamp and shows it as a readable date in UTC and your local timezone, plus ISO 8601 and a relative phrase like "3 days ago". Paste a date instead and it gives you the timestamp back.

Seconds or milliseconds?

Both are common: databases and Unix tools usually store seconds, while JavaScript's Date.now() returns milliseconds. The tool decides based on the number's length (13+ digits is treated as milliseconds), so you rarely have to think about it.

Privacy

Everything is computed in your browser using your device's clock and timezone. Nothing you enter is sent anywhere.