diff --git a/ziptotar.sh b/ziptotar.sh
new file mode 100644
index 0000000..ba03e9d
--- /dev/null
+++ b/ziptotar.sh
@@ -0,0 +1,27 @@
+#!/bin/sh
+# Usage: ziptotar.sh <filename1> <filename2> …
+# Based on https://techoverflow.net/2012/11/22/convert-zip-to-tar-using-linux-shell/
+
+set -e
+if [ "$#" -lt 1 ]; then
+    echo "Need at least one filename."
+    exit 1
+fi
+
+for file in "$@"; do
+    tmpdir=$(mktemp -d)
+    #Copy the zip to the temporary directory
+    cp "${file}" "${tmpdir}/"
+    #Unzip
+    (cd "${tmpdir}" && unzip -q "${file}")
+    #Remove the original zipfile because we don't want that to be tar'd
+    rm "$tmpdir/${file}"
+    #Tar the files
+    outfilename=$(echo "${file}" | rev | cut -d. -f2- | rev).tar.lz
+    (cd "${tmpdir}" && tar --lzip -cvf "$outfilename" ./*)
+    mv "${tmpdir}/${outfilename}" .
+    #Remove the temporary directory
+    rm -rf "${tmpdir}"
+    #Print what we did
+    echo "Converted ${file} to ${outfilename}"
+done