Video guide · 19 seconds
Watch: convert Unix timestamps
No sound. Each step is captioned on screen and also written out in the guide below.
Data & developer tools / Time
Timestamp Converter
Turn Unix timestamps into readable dates, or convert an ISO date back to seconds and milliseconds.
Workspace
Make sense of a moment
Runs locally in your browser. Values are not uploaded, saved, or included in sharing.
Convert from
How it works
One instant, different formats
- 01Choose the source
Select Unix timestamp or ISO date. For timestamps, select seconds or milliseconds.
- 02Convert locally
See the Unix values, UTC date, and the same moment in your device's timezone.
- 03Use the result
Copy the report or download it as a text file. Use current time takes a snapshot of your device clock.
Example
The start of 2026
1767225600 seconds 1767225600000 milliseconds 2026-01-01T00:00:00.000Z
All three represent the same instant. A local date can fall on the previous day depending on your timezone.
Good to know
Frequently asked questions
What is Unix time?
Unix time counts elapsed seconds since January 1, 1970 at 00:00:00 UTC, without counting leap seconds. Negative values represent earlier dates.
Why choose seconds or milliseconds?
One second is 1,000 milliseconds. This tool does not guess the unit from the number's length, so early dates and negative values remain unambiguous. Millisecond inputs must be whole numbers.
Which date formats are accepted?
Use a four-digit year and an explicit timezone: YYYY-MM-DDTHH:mm:ssZ or YYYY-MM-DDTHH:mm:ss±HH:mm. Up to three fractional-second digits are supported. For example, 2026-01-01T05:30:00+05:30 is midnight UTC. Date-only values, ambiguous local times, and leap-second inputs are rejected.
Why does local time differ from UTC?
Your browser uses your device's timezone and daylight-saving rules for the local result. ISO input must include Z for UTC or a numeric offset to identify one instant even during a daylight-saving transition.