diff --git a/url_to_id b/url_to_id
new file mode 100755
index 0000000..69cc0fc
--- /dev/null
+++ b/url_to_id
@@ -0,0 +1,23 @@
+#!/bin/sh
+
+## get a selector in gph format:
+##
+##   [TYPE|SEL|HOST|PORT]
+##
+## and print on output the corresponding selectorid:
+##
+##   TYPE|SEL|HOST|PORT|SHA256
+## 
+## which is understood by `burrow`
+
+gph_to_id(){
+	gph="$( echo $1| sed 's/\[//g;s/\]//g')"
+	OLDIFS=$IFS
+	#IFS=$'\t\n'
+	IFS="|"
+	sid=$(echo "${gph}" | sha256sum | cut -d " " -f 1)
+	echo "${gph}|${sid}"
+	IFS="$OLDIFS"
+}
+
+gph_to_id "$1"