diff --git a/admin/audit-jar.sh b/admin/audit-jar.sh
new file mode 100755
index 000000000..3f55bcaff
--- /dev/null
+++ b/admin/audit-jar.sh
@@ -0,0 +1,68 @@
+#!/bin/bash
+
+###
+ # Copyright (C) 2019 LAMP/EPFL and Lightbend, Inc.
+ #
+ # Compare JAR from Sonatype with version tag in Git.
+ #
+ # Builds a JAR from a tag, and then compares the JAR downloaded from
+ # Sonatype.
+ #
+ # Usage:
+ #   ./admin/audit-jar.sh SCALA-XML-VERSION SCALA-VERSION
+ #
+ # SCALA-XML-VERSION is the scala-xml version, e.g. v1.0.5
+ # SCALA-VERSION is the Scala version, e.g. 2.11.12
+ #
+ # Examples:
+ #   ./admin/audit-jar.sh v1.1.1 2.12.6
+ #   env PROJECT=xmlJS TARGET_DIR=js/target JAR_DIR=jars \
+ #       SCALAJS_SUFFIX=_sjs0.6 SCALAJS_VERSION=0.6.25 \
+ #       ./admin/audit-jar.sh v1.1.1 2.11.12
+ #
+ # Required dependencies:
+ #  - sbt 1.x
+ #  - git
+ #  - jardiff
+ ##
+
+set -e
+
+if [ -z "$1" ]; then
+    echo "Error: Missing scala-xml version" >&2
+    exit 1
+elif [ -z "$2" ]; then
+    echo "Error: Missing Scala version" >&2
+    exit 1
+fi
+
+SCALA_XML_TAG=${1%%#*} # Cleanup tags, e.g. v1.1.1#2.13.0-M5#8
+SCALA_XML_VERSION=${SCALA_XML_TAG#v}
+SCALA_VERSION=$2
+SCALA_BINARY_VERSION=${SCALA_VERSION%.*}
+SCALAJS_SUFFIX=${SCALAJS_SUFFIX-}
+
+PROJECT=${PROJECT-xml}
+TASK=${TASK-package}
+TARGET_DIR=${TARGET_DIR-./jvm/target}
+IVY_CACHE=${IVY_CACHE-~/.ivy2/cache}
+PKG_ORG=${PKG_ORG-org.scala-lang.modules}
+PKG_NAME=${PKG_NAME-scala-xml}
+JARDIFF_JAR=${JARDIFF_JAR-jardiff.jar}
+JAR_DIR=${JAR_DIR-bundles}
+GIT_DIR=/tmp/$PKG_NAME${SCALAJS_SUFFIX}-$SCALA_XML_VERSION-$SCALA_VERSION
+
+git checkout $SCALA_XML_TAG
+sbt "++$SCALA_VERSION" $PROJECT/$TASK
+
+PUBLISHED_ARTIFACT=$IVY_CACHE/$PKG_ORG/${PKG_NAME}${SCALAJS_SUFFIX}_${SCALA_BINARY_VERSION}/$JAR_DIR/${PKG_NAME}${SCALAJS_SUFFIX}_${SCALA_BINARY_VERSION}-${SCALA_XML_VERSION}.jar
+
+LOCAL_ARTIFACT=$TARGET_DIR/scala-${SCALA_BINARY_VERSION}/${PKG_NAME}${SCALAJS_SUFFIX}_${SCALA_BINARY_VERSION}-${SCALA_XML_VERSION}-SNAPSHOT.jar
+
+DIFF_FILE=$PKG_NAME${SCALAJS_SUFFIX}-$SCALA_XML_VERSION-$SCALA_VERSION.diff
+
+java -jar $JARDIFF_JAR --git $GIT_DIR $PUBLISHED_ARTIFACT $LOCAL_ARTIFACT > $DIFF_FILE
+
+echo "Please review $DIFF_FILE and the repo in $GIT_DIR"
+
+## End of script