diff --git a/contract/explode-bundle.sh b/contract/explode-bundle.sh
new file mode 100755
index 0000000..142f165
--- /dev/null
+++ b/contract/explode-bundle.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+# Explode the content of an .js bundle into a directory.
+# NB: Overwrites the existing directory.
+#
+# Usage: explode-bundle.sh <bundle.js>
+
+JS_PATH=$1
+# verify that the file exists
+if [ ! -f "$JS_PATH" ]; then
+    echo "File not found: $JS_PATH"
+    exit 1
+fi
+JSON_PATH="$1on"
+BUNDLE_NAME=$(basename "$JS_PATH" .js)
+DIR=$(dirname "$JS_PATH")
+
+echo "Exploding $BUNDLE_NAME in $DIR"
+
+sed -n 's/^export default \(.*\);$/\1/p' "$JS_PATH" | jq '.' >"$JSON_PATH"
+
+EXPLODED="$DIR/$BUNDLE_NAME"
+rm -rf "$EXPLODED"
+mkdir "$EXPLODED"
+jq -r .endoZipBase64 <"$JSON_PATH" | base64 -d | tar xC "$EXPLODED"
+find "$EXPLODED" -type f -exec du -h {} + | sort -hr >"$EXPLODED"/files.txt
+open "$EXPLODED"/files.txt