Unix Timestamp Converter
Convert Unix timestamps (seconds or milliseconds) to and from ISO 8601, UTC and local dates. Includes a live clock and relative-time output.
Epoch time, decoded
A Unix timestamp counts seconds since 1 January 1970 UTC. Paste one to see the equivalent ISO 8601 string, UTC and local time, and a relative description like '3 days ago'. It also works in reverse: enter a date and read back the epoch value.
Seconds or milliseconds
APIs disagree on units — some send seconds, JavaScript uses milliseconds. Toggle the unit so a value like 1719792000 is interpreted correctly, and copy whichever representation your system expects.
Live clock included
A ticking display shows the current time as a seconds timestamp, milliseconds timestamp and ISO string, so you can grab 'now' instantly for logging, debugging or test data.
How to timestamp converter
- Enter a Unix timestamp or a date string.
- Choose whether numbers are seconds or milliseconds.
- Read the ISO, UTC, local and relative versions.
- Copy the format you need, or click 'Use now'.