diff --git a/utils/fdcanusb_capture.py b/utils/fdcanusb_capture.py
new file mode 100755
index 00000000..c7626a84
--- /dev/null
+++ b/utils/fdcanusb_capture.py
@@ -0,0 +1,26 @@
+#!/usr/bin/python3
+
+# Copyright 2021 Josh Pieper, jjp@pobox.com.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+'''Capture data from a fdcanusb to a file'''
+
+import sys
+import time
+
+fd = open(sys.argv[1])
+out = open(sys.argv[2])
+while True:
+    line = fd.readline()
+    print(f'{time.time()} {line}', file=out)