Just to answer my question, it seems that the following can do the trick. REGEX = (.*)([A-z0-9._%+-]+@[A-z0-9.-]+\.[A-z]{2,63})(.*) FORMAT = $1********@*********$3 REGEX = (.*)((\d{4}[-|\s]*){3}\d{4})(.*) FORMAT = $1****-****-****-****$3 ... View more