Convert Unix epoch time to human-readable dates and back. Enter seconds or milliseconds since January 1, 1970 UTC and see local and UTC datetime values.
—Local datetime
—UTC datetime
—Unix output
Frequently Asked Questions
What is Unix time?
Unix time counts seconds (or milliseconds) since January 1, 1970 00:00:00 UTC — common in logs, APIs, and databases.
Seconds vs milliseconds?
Most APIs use seconds (10 digits). JavaScript Date uses milliseconds (13 digits). Toggle the unit to match your source.
Can I convert dates to Unix?
Yes. Use the datetime picker to get the Unix value in your selected unit.
Need ISO date support too?
Use the Timestamp Converter for ISO 8601 strings and broader formats.
Is this tool free and does it work on mobile?
Yes on both counts. The Unix Time Converter on draft21 is completely free with no sign-up required and works on all devices.