Unix Timestamp Converter
Convert between Unix timestamps (seconds or milliseconds), ISO 8601, UTC and your local time — in both directions, with the current epoch ticking live.
Conversions
What Timestamp Converter does
Both directions
Timestamp → date and date → timestamp, auto-detecting seconds vs milliseconds.
UTC & local
See ISO 8601, UTC and your own local time side by side.
Relative time
Know at a glance how long ago (or ahead) a timestamp is.
100% local
Nothing is uploaded — it all runs in your browser.
Frequently asked questions
What is a Unix timestamp?
A Unix timestamp (or epoch time) is the number of seconds that have elapsed since 00:00:00 UTC on 1 January 1970. Many APIs and databases store dates this way. Some systems use milliseconds instead of seconds.
Does it handle seconds and milliseconds?
Yes. Paste an all-digit value and the converter auto-detects whether it is in seconds or milliseconds and shows both, plus ISO 8601, UTC and your local time.
Can I convert a date back to a timestamp?
Yes. Paste an ISO 8601 date (e.g. 2024-06-15T00:00:00Z) or most common date strings and it returns the matching Unix timestamp in seconds and milliseconds.
Is my data private?
Completely. All conversion happens in your browser — no timestamps are sent anywhere.
Last updated 2026-08-08