A Unix timestamp is the number of seconds since 1 January 1970 UTC. This tool converts a timestamp into a readable date and time, and converts a date back into a timestamp — supporting both seconds and milliseconds.
How to use it
- Enter a Unix timestamp to see the date, or pick a date to see the timestamp.
- Toggle between seconds and milliseconds.
- The current timestamp is shown live.
- Copy any value with one click.
About Unix Timestamp Converter
Timestamps are everywhere in software: database records, log lines, API responses, JWT claims and cache headers all use epoch time because it is unambiguous and timezone-free. But a number like 1700000000 means nothing at a glance. This converter makes it instantly readable in both UTC and your local time, and goes the other way too, which is handy when constructing test data or debugging time-based logic. Everything is computed locally.
FAQ
Seconds or milliseconds?
Unix time is traditionally in seconds. JavaScript and many APIs use milliseconds (seconds × 1000). This tool supports both — toggle the unit.
What timezone is used?
Timestamps are timezone-independent. The tool shows both UTC and your browser local time so you can compare.
Are Unix timestamps in seconds or milliseconds?
Unix timestamps are traditionally in seconds since 1 January 1970 UTC. JavaScript and some APIs use milliseconds (13 digits instead of 10). This converter handles both — paste either and it detects the scale.