There is! It's called microformats[1] and is a very minimal format to embed machine readable data inside of html via standardized class names. The format for a person would be an h-card[2]. There are a bunch of parsing libraries for multiple programming laguages, such as https://go.microformats.io/.

For example if you enter my website url in there you get all the data as a nice json object: https://go.microformats.io/?url=https%3A%2F%2Ftiim.ch

[1]: http://microformats.org/ [2]: http://microformats.org/wiki/h-card