Unix Timestamp Converter
Convert between Unix epoch time and human-readable dates, in both directions. Free, instant, and it all runs on your device.
Current Unix time
Timestamp → Human date
Human date → Timestamp
Common formats for the entered timestamp
| Format | Value |
|---|---|
| ISO 8601 (UTC) | — |
| RFC 2822 | — |
| Local string | — |
| Unix seconds | — |
| Unix milliseconds | — |
Timezone note: Unix timestamps are always counted from 1 January 1970 00:00:00 UTC and carry no timezone of their own. "Local time" above uses your device's timezone (), while "UTC" shows the same instant in Coordinated Universal Time.
How to use the Unix Timestamp Converter
- Watch the live epoch clock at the top for the current Unix time in seconds and milliseconds.
- To decode a timestamp, paste it into "Timestamp → Human date", choose seconds, milliseconds, or auto-detect, and click Convert.
- To encode a date, pick a date and time in "Human date → Timestamp" and get the value in both seconds and milliseconds.
- Check the common formats table for ISO 8601 and RFC 2822 versions of the same instant.
Why use ZillaKit's epoch converter?
Unix time (also called epoch time or POSIX time) counts the number of seconds since 1 January 1970 UTC, and it's the standard way servers, databases, logs, and APIs store moments in time. This converter turns any Unix timestamp into a readable local and UTC date — with a friendly relative label like "3 hours ago" — and turns a picked calendar date back into an epoch value in both seconds and milliseconds. It auto-detects whether your number is in seconds or milliseconds, shows ISO 8601 and RFC 2822 formats side by side, and keeps a live epoch clock ticking so you always have "now" on hand. Everything runs locally in your browser with no signup and nothing uploaded, so it's fast, private, and works offline once loaded. It's built for developers debugging logs, checking token expiry, or converting API responses.
FAQ
What is a Unix timestamp?
A Unix timestamp is the number of seconds that have elapsed since 00:00:00 UTC on 1 January 1970, not counting leap seconds. It's a compact, timezone-free way to represent a specific instant.
Seconds or milliseconds — how do I tell?
Second-based timestamps for recent dates are 10 digits; millisecond timestamps are 13 digits. Auto-detect uses the magnitude of the number to choose, and you can override it with the radio buttons.
Does the timestamp include a timezone?
No. Unix time is always in UTC. This tool shows the same instant in both your local timezone and UTC so you can compare them.
Is my data sent anywhere?
No. All conversion happens locally in your browser using the built-in Date object. Nothing is uploaded or stored.