The script I used to migrate from LastPass to 1Password. Your mileage may vary.

gistfile1.sh

#!/bin/zsh
emulate -L zsh
setopt err_exit warn_create_global no_unset
#setopt xtrace

function parse_elem {
  local obj cur="$1" in_recovery="$2"
	if [[ -z "$cur" ]]; then
		read -r cur || return 1
		ret_delim=$'\n'
	fi
	print -r "$cur" | IFS=',' read -r obj cur
	if [[ ( $in_recovery == false && $obj[1] != "\"" ) || ( $obj[-1] == "\"" && ${#obj} != 1 ) ]]; then
		parsed+=( "$obj" )
		unparsed="$cur"
	else
		local ret_delim=","
		if ! parse_elem "$cur" true; then
			echo "Parse error" >&2
			exit 1
		fi
		parsed[-1]="${obj}${ret_delim}${parsed[-1]}"
	fi
}

read -r REPLY
typeset -a fields
fields=( "${(@s:,:)REPLY}" )
integer nfields=${#fields}

typeset -a parsed
typeset unparsed
typeset ret_delim
while parse_elem "$unparsed" false; do done
integer i
[[ -z "$unparsed" ]] || exit 1
for (( i = 0; i < ${#parsed} / nfields; i++ )); do
	integer x
	typeset -a tmp
	tmp=()
	for (( x = (i * nfields) + 1; x <= (i * nfields) + nfields; x++ )); do
		local p="${parsed[$x]}"
		if [[ $p[1] != '"' ]]; then
			p=( "\"$p\"" )
		fi
		integer d
		local temp_p=""
		for (( d = 1; d < ${#p}; d++ )); do
			local c="${p[$d]}"
			if [[ "$c${p[$d+1]}" == '\"' ]]; then
				c='\\"'
			fi
			temp_p+="$c"
		done
		p="${temp_p}${p[-1]}"
		tmp+=( "$p" )
	done
	print -r "${(j:,:)tmp}"
done

(( x - 1 != ${#parsed} )) && exit 1
exit 0