About the Timestamp Converter
This timestamp converter turns a Unix epoch value into a human-readable date and back again. Paste a timestamp in seconds or milliseconds and it shows the ISO 8601 string, the UTC and local representations and the day of the week. Paste a date and it gives you the epoch value. Leave it blank to get the current time.
Unix time counts the seconds since 1 January 1970 UTC and is the standard way computers store moments in time, so converting it to something readable is a constant developer chore. Everything runs in your browser — nothing is sent to a server — and millisecond timestamps are detected automatically.
How to use it
- Type or paste a Unix timestamp (seconds or milliseconds).
- Or paste a date string like 2026-06-27 to convert the other way.
- Leave the field empty and press 'use now' for the current time.
- Read the epoch, ISO 8601, UTC and local values.
Examples
- Convert 1700000000 to a readable date.
- Find the Unix timestamp for a given calendar date.
- Get the current epoch time in seconds and milliseconds.
Frequently asked questions
What is a Unix timestamp?
It is the number of seconds elapsed since 00:00:00 UTC on 1 January 1970 (the Unix epoch), ignoring leap seconds. It is a compact, timezone-independent way to represent a moment in time.
Seconds or milliseconds — how does it know?
Timestamps with 12 or more digits are treated as milliseconds; shorter values are treated as seconds. Both are shown in the output regardless.
Does it handle my local timezone?
Yes. The output shows both the UTC value and a 'local' value rendered in your device's timezone.
Does my input leave the browser?
No. The conversion runs entirely client-side in JavaScript; nothing is sent to a server.