This tool converts Unix timestamps (seconds or milliseconds) into readable ISO dates — one per line, all in your browser.
How to use it
- Paste one or more timestamps.
- Each is converted to an ISO date.
- Copy the readable dates.
About Unix Timestamp to Date
Logs and APIs are full of Unix timestamps that are hard to read at a glance. This tool converts each timestamp to a human-readable ISO 8601 date in UTC, automatically detecting whether the value is in seconds or milliseconds by its length. Paste many at once, one per line. It runs entirely in your browser.
FAQ
Does it handle milliseconds?
Yes — it detects 13-digit millisecond timestamps and 10-digit second timestamps automatically.
What timezone is the output?
Output is in UTC as an ISO 8601 string for unambiguous reading.
Can I convert many at once?
Yes — paste multiple timestamps separated by spaces or newlines.