diff --git a/frontend_tests/node_tests/stream_data.js b/frontend_tests/node_tests/stream_data.js
index 6000b5f306..6b6dd7ebf1 100644
--- a/frontend_tests/node_tests/stream_data.js
+++ b/frontend_tests/node_tests/stream_data.js
@@ -9,6 +9,10 @@ const {run_test} = require("../zjsunit/test");
 const blueslip = require("../zjsunit/zblueslip");
 const {page_params, user_settings} = require("../zjsunit/zpage_params");
 
+// TODO: Remove after we enable support for
+// web_public_streams in production.
+page_params.development_environment = true;
+
 const color_data = zrequire("color_data");
 const stream_topic_history = zrequire("stream_topic_history");
 const peer_data = zrequire("peer_data");
@@ -76,14 +80,27 @@ test("basics", () => {
         is_muted: true,
         invite_only: false,
     };
+    const web_public_stream = {
+        subscribed: false,
+        color: "yellow",
+        name: "web_public_stream",
+        stream_id: 4,
+        is_muted: false,
+        invite_only: false,
+        history_public_to_subscribers: true,
+        is_web_public: true,
+    };
     stream_data.add_sub(denmark);
     stream_data.add_sub(social);
+    stream_data.add_sub(web_public_stream);
     assert.ok(stream_data.all_subscribed_streams_are_in_home_view());
     stream_data.add_sub(test);
     assert.ok(!stream_data.all_subscribed_streams_are_in_home_view());
 
     assert.equal(stream_data.get_sub("denmark"), denmark);
     assert.equal(stream_data.get_sub("Social"), social);
+    assert.equal(stream_data.get_sub("web_public_stream"), web_public_stream);
+    assert.ok(stream_data.is_web_public(web_public_stream.stream_id));
 
     assert.deepEqual(stream_data.home_view_stream_names(), ["social"]);
     assert.deepEqual(stream_data.subscribed_streams(), ["social", "test"]);
@@ -101,6 +118,7 @@ test("basics", () => {
         stream_data.get_stream_privacy_policy(denmark.stream_id),
         "invite-only-public-history",
     );
+    assert.equal(stream_data.get_stream_privacy_policy(web_public_stream.stream_id), "web-public");
 
     assert.ok(stream_data.get_invite_only("social"));
     assert.ok(!stream_data.get_invite_only("unknown"));
diff --git a/static/js/stream_data.js b/static/js/stream_data.js
index efb3780757..791b1661f4 100644
--- a/static/js/stream_data.js
+++ b/static/js/stream_data.js
@@ -129,6 +129,17 @@ export const stream_privacy_policy_values = {
     },
 };
 
+if (page_params.development_environment) {
+    stream_privacy_policy_values.web_public = {
+        code: "web-public",
+        name: $t({defaultMessage: "Web public"}),
+        description: $t({
+            defaultMessage:
+                "Anyone can join; anyone on the Internet can view complete message history without creating an account",
+        }),
+    };
+}
+
 export const stream_post_policy_values = {
     everyone: {
         code: 1,
@@ -544,6 +555,9 @@ export function id_is_subscribed(stream_id) {
 export function get_stream_privacy_policy(stream_id) {
     const sub = sub_store.get(stream_id);
 
+    if (sub.is_web_public) {
+        return stream_privacy_policy_values.web_public.code;
+    }
     if (!sub.invite_only) {
         return stream_privacy_policy_values.public.code;
     }
@@ -553,6 +567,11 @@ export function get_stream_privacy_policy(stream_id) {
     return stream_privacy_policy_values.private_with_public_history.code;
 }
 
+export function is_web_public(stream_id) {
+    const sub = sub_store.get(stream_id);
+    return sub !== undefined && sub.is_web_public;
+}
+
 export function get_invite_only(stream_name) {
     const sub = get_sub(stream_name);
     if (sub === undefined) {