Javascript Unix time to UTC string in Chrome console

Problem:

In the Chrome Dev Tools console, I'd like to view a Unix Time numerical value/timestamp as a human-readable UTC date/time string.

Solution:

In the Chrome Dev Tools console (and in general), one way to view a Unix (POSIX/Epoch) Time as a human-readable UTC string is to use Javascript Date.

For example, if the number of seconds since Epoch is 1480528272, we can convert this in the console by:

new Date(1480528272*1000).toUTCString()

Note that we need to convert the number of seconds to milliseconds since Epoch by multiplying by 1000.

Notes:

Note that due to the size of a Javascript integer, overflow may occur if the desired timestamp is larger than Number.MAX_SAFE_INTEGER.

A Javascript Date object also has a valid range that must be adhered to. More information can be found in here.

References:

• http://www.w3schools.com/jsref/jsref_obj_date.asp
• https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Date
• https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER