See my other response to the parent for the reason I felt there was room to improve on the existing websites. Are there any other features you would find useful in a timestamp converter?
Take the timestamp "1677951565000123456" for example - If I put it into the link you posted, it just gives me "Saturday, March 4, 2023 11:39:25 AM". While it's a minor drawback, it requires another step to figure out the microsecond and nansecond part of the timestamp since it's not in the output. My website would display "Saturday March 3 2023 11:39:25.000,123,456 AM -06:00 (nanos)", which gives you "000,123,456" telling you the milli,micro,nano breakdown of the timestamp
I started learning HTML/CSS on Codecademy about 8 years ago when I was in early highschool. Now about to graduate from college with my CS degree. Thanks for making a great service that helped shape my life