How do I convert a Unix timestamp to a date?
Multiply seconds by 1,000 to get milliseconds since January 1, 1970 UTC, then format that moment as a date. Paste the number here and the tool detects the unit and shows the date in UTC and your time zone.
- Paste a timestamp or a date string.
- Check which unit it was read as.
- Copy the format you need from the table.
- To go the other way, pick a date and time below and choose your zone or UTC.
Examples
Seconds
Input
1794268800
Result
ISO 8601: 2026-11-10T00:00:00.000Z
HubSpot API dates
HubSpot's API returns many date properties as Unix milliseconds, for example 1794268800000. Paste it here to read it.
Frequently asked questions
Seconds or milliseconds?
10 digit numbers are usually seconds and 13 digit numbers milliseconds. The tool decides by digit count and tells you which it used.
Do Unix timestamps have a time zone?
No. A timestamp counts seconds since 1970-01-01 00:00:00 UTC. Time zones only matter when you display it.
What is the year 2038 problem?
Systems that store seconds in a signed 32-bit integer overflow on January 19, 2038. JavaScript dates and most modern systems use larger numbers and are not affected.
Does it handle leap seconds?
Unix time ignores leap seconds, as do JavaScript dates, so conversions match what other systems produce.