Decoded
Enter an epoch or pick a datetime.
Unix timestamp converter
Epoch seconds or milliseconds ↔ UTC and local datetimes—ideal for logs and APIs.
Why epoch values matter
Unix timestamps are a compact way to store dates in logs, APIs, databases, and debugging output. Seconds since 1970 are easy for machines to compare, sort, and transmit, while this converter makes the value readable for humans again.
Seconds, milliseconds, and time zones
A 10-digit timestamp usually means seconds, while a 13-digit value often means milliseconds from JavaScript or browser code. When converting back to a date, remember that the epoch itself is UTC, even if your local display shows a different wall time.
Seconds versus milliseconds
Unix time is usually seconds since 1 January 1970 UTC. JavaScript Date.now() returns milliseconds — divide by 1000 if your log line has 13 digits.
Timezone context
Epoch values are UTC-based. When converting to local wall time, your browser applies your current timezone and DST rules.
Working with Unix time
Convert between human-readable dates and Unix epoch values for log analysis, API debugging, and database timestamps.
Privacy
Values you enter stay in the browser session.
Quick start
- Pick direction — Convert epoch seconds or milliseconds to a human date, or enter a date to get a timestamp.
- Enter the value — Paste a Unix timestamp or choose date and time components.
- Copy the result — Use the converted value in logs, APIs, or database debugging.