Timestamp Converter
Convert seconds or milliseconds to UTC and local time, or turn a date into a Unix timestamp.
What does this tool do?
A Unix timestamp counts time from 1970-01-01T00:00:00Z. Choose seconds or milliseconds to see a readable UTC and local date, or convert a timezone-aware date back to Unix time.
When to use this tool
Translate an epoch value from a log or API response into a readable date, or convert a dated event into Unix time. Confirm whether the source uses seconds or milliseconds and include an explicit timezone when entering a date.
How to use Timestamp Converter
- Select timestamp-to-date or date-to-timestamp.
- Choose seconds or milliseconds. For dates, use an ISO string with a timezone.
- Convert and copy the UTC, local, and Unix representations.
A quick example
1700000000 seconds → 2023-11-14T22:13:20.000Z
Common questions
Seconds or milliseconds?
A modern Unix timestamp in seconds is typically 10 digits; milliseconds typically have 13. Always confirm the unit in the source system.
Why require a timezone?
An explicit Z or ±HH:MM offset prevents ambiguous local date interpretation.
Working with a large input? Text converters accept up to 1,000,000 characters. Regex test text is limited to 50,000 characters and JWTs to 100,000.