Unix Timestamp Converter — Free Online Tool
Convert Unix epoch timestamps (seconds or milliseconds) to human-readable dates across any timezone, or convert a calendar date and time back to its Unix timestamp. A live clock shows the current Unix timestamp in real time, making it easy to calculate time differences or debug time-sensitive APIs.
100% client-side. No uploads. Your data never leaves your browser.
How to use Unix Timestamp Converter
- Enter a Unix timestamp (seconds or milliseconds) in the input field.
- The converted date and time appear instantly below in your selected timezone.
- To convert a date to a timestamp, switch to 'Date to Timestamp' mode and fill in the date/time fields.
- Copy the result with the Copy button.
Frequently Asked Questions
Does this support millisecond timestamps?
Yes. The tool auto-detects whether the input is in seconds (10 digits) or milliseconds (13 digits) and adjusts accordingly.
Can I convert to a specific timezone?
Yes. Select any IANA timezone from the dropdown and the date/time output updates immediately.
What is Unix time (epoch time)?
Unix time counts the number of seconds elapsed since 00:00:00 UTC on 1 January 1970, ignoring leap seconds. It is the standard time reference in most programming environments.
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