Unix Timestamp Converter
Convert Unix timestamps to readable dates and back, in local time or UTC.
Runs in your browser using Date + Intl.DateTimeFormat — nothing is uploaded
How to use it
- Paste a timestamp to see the date, or pick a date to get the timestamp.
- Seconds and milliseconds are detected automatically.
Questions
Seconds or milliseconds?
Unix timestamps are traditionally in seconds; JavaScript uses milliseconds. The tool detects which you pasted from its magnitude and tells you what it assumed.
What is the 2038 problem?
Systems storing timestamps as a signed 32-bit integer overflow on 19 January 2038. Anything using 64-bit values, including JavaScript, is unaffected.