diff --git a/tools/write-zone-file.cr b/tools/write-zone-file.cr
new file mode 100644
index 0000000..853ead5
--- /dev/null
+++ b/tools/write-zone-file.cr
@@ -0,0 +1,35 @@
+require "json"
+require "../src/storage/zone.cr"
+
+alias DSZ = DNSManager::Storage::Zone
+
+#
+# Create a zone file.
+#
+
+if ARGV.size < 1
+	puts "usage: domain"
+	exit 0
+end
+
+domain = ARGV[0]
+zone = DSZ.new domain
+
+#
+# Add some values.
+#
+
+zone.resources << DSZ::A.new "www",  600.to_u32, "10.0.0.1"
+zone.resources << DSZ::A.new "www2", 600.to_u32, "10.0.0.2"
+
+zone.resources << DSZ::SOA.new  "#{domain}.", # name
+  60.to_u32,                                  # TTL
+  "IN",                                       # target (??)
+  "ns0.some-example.com.",                    # Master Name Server for the zone
+  "john\.doe.#{domain}"                       # admin email address
+
+zone.resources << DSZ::NS.new "#{domain}.", 3600.to_u32, "ns1.some-example.com."
+zone.resources << DSZ::NS.new "#{domain}.", 3600.to_u32, "ns0.some-example.com."
+
+
+File.write("#{domain}.json", zone.to_json)