I have used this free online EXIF reader
http://regex.info/exif.cgi
It works. Keep it mind, it doesnt matter where the picture came from (facebook, whatsapp, etc.). EXIF is a standard metadata format embedded in the picture. The problem is many sites will strip such data. Facebook strips a ton of the useful info out (date, location, camera name, etc.)
Try it with a picture you've taken directly that hasnt been uploaded/downloaded to see the types of data fields that are often present.
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Last edited by wander at 3-6-2013 00:34 ]