Unix Timestamp Converter
Convert Unix epoch timestamps (in seconds or milliseconds) to ISO 8601, UTC, and local human-readable dates — or convert any calendar date back into an epoch integer. Includes a live ticking epoch clock for quick debugging.
How to Use Unix Timestamp Converter
- 1Copy the current live Unix epoch timestamp from the top bar, or paste your own timestamp into the converter input.
- 2The tool automatically detects whether your timestamp is in seconds (10 digits) or milliseconds (13 digits).
- 3View the converted date in UTC, your local browser timezone, ISO 8601 format, and relative time.
- 4Use the reverse Date-to-Timestamp section to convert a specific year, month, day, and time into an epoch value.
Frequently Asked Questions
What is the Unix epoch?
The Unix epoch is 00:00:00 UTC on January 1, 1970. A Unix timestamp is simply the total number of seconds (or milliseconds) that have elapsed since that moment, excluding leap seconds.
How do I know if a timestamp is in seconds or milliseconds?
Current timestamps in seconds are 10 digits long (e.g., 1762550000), while timestamps in milliseconds — such as those returned by JavaScript's Date.now() — are 13 digits long.
What is the Year 2038 problem?
Systems that store Unix timestamps as signed 32-bit integers will overflow after 2,147,483,647 seconds (03:14:07 UTC on January 19, 2038). Modern 64-bit operating systems and databases use 64-bit integers, avoiding this limit.
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