Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back. Supports seconds and milliseconds, UTC, local time and ISO 8601.
—Timestamp to date
Date to timestamp
Interpreted in your local time zone.
About Unix Timestamp Converter
A Unix timestamp counts the seconds since 1 January 1970 UTC — the format almost every API, database and log file uses to store a moment in time. Convert in either direction, in seconds or milliseconds, and see the result in UTC, your local zone and ISO 8601 at once.
How to use it
- Paste a timestamp, or pick a date and time.
- Choose seconds or milliseconds — the tool auto-detects by length.
- Read the result in UTC, local time and ISO 8601.
Frequently asked questions
Seconds or milliseconds — how do I tell?
By length. A current timestamp in seconds has 10 digits; in milliseconds it has 13. JavaScript's Date.now() returns milliseconds, while most backends and databases use seconds.
What is the year 2038 problem?
A signed 32-bit timestamp overflows on 19 January 2038. Systems still storing time in a 32-bit integer will wrap to a negative number. Modern platforms use 64-bit values and are unaffected.
Do Unix timestamps have a time zone?
No. A timestamp is always an absolute moment in UTC. The time zone only matters when you format it for display.
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