⏱
Timestamp Converter
Convert Unix timestamps (seconds or milliseconds) to human-readable dates, or convert any date string back to a Unix timestamp. Shows ISO 8601, UTC, and local time.
DeveloperFree • No signup • Works in browser
Output
Output will appear here...
Frequently Asked Questions
What is a Unix timestamp?+
A Unix timestamp is the number of seconds elapsed since January 1, 1970 at 00:00:00 UTC (the Unix epoch). It is the most common way to store time in databases and APIs.
What is the difference between seconds and milliseconds timestamps?+
Unix timestamps in seconds are 10 digits long (e.g. 1700000000). Millisecond timestamps are 13 digits long (e.g. 1700000000000). JavaScript uses milliseconds by default; most other systems use seconds.
What does ISO 8601 format look like?+
ISO 8601 looks like: 2024-01-15T10:30:00Z. The T separates date and time, and Z means UTC. It is the international standard for representing dates and times.
Why does my timestamp show the wrong time?+
The tool shows your local time based on your browser's timezone. If you expected a different timezone, use the UTC value as a reference.
What is the maximum Unix timestamp?+
The maximum 32-bit Unix timestamp is 2,147,483,647, corresponding to January 19, 2038 — the Y2K38 problem. Modern systems use 64-bit timestamps which won't overflow for billions of years.