Unix Timestamp Converter
Convert Unix/epoch timestamps to human dates and back, in seconds or milliseconds.
Runs entirely in your browser — your input never leaves your deviceAbout this tool
A Unix timestamp (also called epoch time) is the number of seconds since 1 January 1970 UTC. This converter turns a timestamp into a readable date — in ISO 8601, UTC and your local timezone — and converts a date back into a timestamp, in both seconds and milliseconds.
Seconds vs milliseconds
Unix time is usually counted in seconds (a 10-digit number today), but JavaScript and many APIs use milliseconds (13 digits). The converter auto-detects which you pasted, or you can force seconds or milliseconds.
Everything runs locally in your browser — no request is made to any server.
Frequently asked questions
What is a Unix timestamp?
It's the number of seconds elapsed since 00:00:00 UTC on 1 January 1970, known as the Unix epoch. It's a compact, timezone-independent way to represent a moment in time, used throughout programming and databases.
How do I convert a timestamp to a date?
Paste the timestamp into the 'Timestamp → date' box. The converter shows the ISO 8601, UTC and local date-times, plus how long ago or from now it is.
Is the timestamp in seconds or milliseconds?
Timestamps in seconds are about 10 digits today; in milliseconds they're about 13. Leave the unit on Auto-detect and the tool figures it out, or pick Seconds or Milliseconds explicitly.
How do I get the current Unix time?
The current timestamp is shown live at the top in both seconds and milliseconds, updating every second, with one-click copy.
Does this send my data anywhere?
No. All conversion happens in your browser using the JavaScript Date API — nothing is uploaded.
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