Convert Unix timestamps (seconds or milliseconds since Jan 1, 1970 UTC) to readable dates and back, with the current timestamp ticking live.
How it works
- Paste your numerical Unix timestamp or human-readable date string.
- The parser automatically detects whether the input is in seconds or milliseconds.
- Read the converted time in UTC, your local time zone, and ISO 8601 format.
Frequently asked questions
How do I tell if a timestamp is in seconds or milliseconds?
A standard current-era timestamp is roughly 10 digits for seconds, and 13 digits for milliseconds. The tool detects this magnitude automatically.
What exactly was timestamp 0?
Timestamp 0 represents Midnight UTC on January 1, 1970 — legally known as the Unix epoch.
What is the dreaded year-2038 problem?
Older systems using signed 32-bit integers for timestamps will physically overflow on Jan 19, 2038. Modern 64-bit systems (including Javascript) are completely immune.