Developer Tools
Unix Timestamp Converter
Convert Unix epoch timestamps to readable dates and back, in seconds or milliseconds, UTC or local time. See ISO 8601 and relative time at a glance. Everything runs in your browser.
Timestamp → Date
Date → Timestamp
Epoch time, decoded in both directions
Logs, databases, JWTs and APIs all speak Unix time, but humans do not. This converter turns a raw epoch timestamp into a readable date — in UTC and your local zone — and goes the other way too, giving you the exact seconds and milliseconds for any date you type or pick.
What you get for every value
- UTC & local — both rendered, no mental math.
- Seconds & milliseconds — auto-detected, switchable.
- ISO 8601 — ready to paste into code.
- Relative time — “in 3 hours”, “2 days ago”.
- Live current time — copy the current epoch in one click.
Frequently asked questions
What is a Unix timestamp?
A Unix timestamp is the number of seconds (or milliseconds) that have elapsed since 00:00:00 UTC on 1 January 1970, the “Unix epoch”. It is a compact, timezone-free way to store a moment in time, used throughout programming and databases.
How do I know if my timestamp is in seconds or milliseconds?
A seconds timestamp for a recent date is about 10 digits; a milliseconds timestamp is about 13 digits. This tool auto-detects the unit based on magnitude, and you can also set it explicitly.
Does it handle time zones?
Yes. Every result is shown in both UTC and your local time zone, alongside the ISO 8601 string and a human-friendly relative time such as “in 3 hours” or “2 days ago”.
Is anything sent to a server?
No. All conversions use your browser’s built-in Date functions and run locally. Nothing is uploaded.