diff --git a/tools/pid2int2int2pid.sh b/tools/pid2int2int2pid.sh
new file mode 100755
index 0000000..9a1c4e0
--- /dev/null
+++ b/tools/pid2int2int2pid.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+
+if [ -z "$1" -o -z "$2" -o ! -f "$1" ] ; then
+    echo "Usage: [SORT_FLAGS=...] pid2int2int2pid.sh IN_PID2INT.bin OUT_INT2PID.bin"
+    exit 1
+fi
+
+swh graph map dump -t pid2int "$1" \
+    | sort -n -k 2 $SORT_FLAGS \
+    | cut -f 1 \
+    | swh graph map write -t int2pid "$2"