diff --git a/tools/global_domains.py b/tools/global_domains.py
new file mode 100755
index 0000000..8a3b5a8
--- /dev/null
+++ b/tools/global_domains.py
@@ -0,0 +1,80 @@
+#!/usr/bin/env python3
+#
+# This script generates a global equivalent domains JSON file from
+# the upstream Bitwarden source repo.
+#
+import json
+import re
+import sys
+import urllib.request
+
+from collections import OrderedDict
+
+if len(sys.argv) != 2:
+    print("usage: %s <OUTPUT-FILE>" % sys.argv[0])
+    print()
+    print("This script generates a global equivalent domains JSON file from")
+    print("the upstream Bitwarden source repo.")
+    sys.exit(1)
+
+OUTPUT_FILE = sys.argv[1]
+
+BASE_URL = 'https://github.com/bitwarden/server/raw/master'
+ENUMS_URL = '%s/src/Core/Enums/GlobalEquivalentDomainsType.cs' % BASE_URL
+DOMAIN_LISTS_URL = '%s/src/Core/Utilities/StaticStore.cs' % BASE_URL
+
+# Enum lines look like:
+#
+#   EnumName0 = 0,
+#   EnumName1 = 1,
+#
+ENUM_RE = re.compile(
+    r'\s*'             # Leading whitespace (optional).
+    r'([_0-9a-zA-Z]+)' # Enum name (capture group 1).
+    r'\s*=\s*'         # '=' with optional surrounding whitespace.
+    r'([0-9]+)'        # Enum value (capture group 2).
+)
+
+# Global domains lines look like:
+#
+#   GlobalDomains.Add(GlobalEquivalentDomainsType.EnumName, new List<string> { "x.com", "y.com" });
+#
+DOMAIN_LIST_RE = re.compile(
+    r'\s*'             # Leading whitespace (optional).
+    r'GlobalDomains\.Add\(GlobalEquivalentDomainsType\.'
+    r'([_0-9a-zA-Z]+)' # Enum name (capture group 1).
+    r'\s*,\s*new List<string>\s*{'
+    r'([^}]+)'         # Domain list (capture group 2).
+    r'}\);'
+)
+
+enums = dict()
+domain_lists = OrderedDict()
+
+# Read in the enum names and values.
+with urllib.request.urlopen(ENUMS_URL) as response:
+    for ln in response.read().decode('utf-8').split('\n'):
+        m = ENUM_RE.match(ln)
+        if m:
+            enums[m.group(1)] = int(m.group(2))
+
+# Read in the domain lists.
+with urllib.request.urlopen(DOMAIN_LISTS_URL) as response:
+    for ln in response.read().decode('utf-8').split('\n'):
+        m = DOMAIN_LIST_RE.match(ln)
+        if m:
+            # Strip double quotes and extraneous spaces in each domain.
+            domain_lists[m.group(1)] = [d.strip(' "') for d in m.group(2).split(",")]
+
+# Build the global domains data structure.
+global_domains = []
+for name, domain_list in domain_lists.items():
+    entry = OrderedDict()
+    entry["Type"] = enums[name]
+    entry["Domains"] = domain_list
+    entry["Excluded"] = False
+    global_domains.append(entry)
+
+# Write out the global domains JSON file.
+with open(OUTPUT_FILE, 'w') as f:
+    json.dump(global_domains, f, indent=2)