When analyzing iOS application data, especially for web browsers such as Google Chrome, Safari, and Opera, you may face another timestamp format—WebKit/Chrome time. This is the number of microseconds since midnight on January 1, 1601. There is also an online converter for this: https://www.epochconverter.com/webkit.
If you don't like or don't want to use online converters for some reason, you can also use a free tool: Digital Detective's DCode. This tool can be used to convert timestamps in a number of different formats, including Unix time (both seconds and milliseconds), Mac absolute time, and WebKit/Chrome time, as shown in the following screenshot:
A WebKit/Chrome timestamp converted with DCode
Many commercial mobile forensic suites will easily convert extracted timestamps for you automatically, but in some cases, it's extremely important to validate it, so it's a must for you to clearly understand the timestamp formats.