diff --git a/src/editor/html_serialize.js b/src/editor/html_serialize.js
new file mode 100644
index 0000000000..bd8842b01f
--- /dev/null
+++ b/src/editor/html_serialize.js
@@ -0,0 +1,14 @@
+export function htmlSerialize(model) {
+    return model.parts.reduce((html, part) => {
+        switch (part.type) {
+            case "newline":
+                return html + "<br />";
+            case "plain":
+            case "pill-candidate":
+                return html + part.text;
+            case "room-pill":
+            case "user-pill":
+                return html + `<a href="https://matrix.to/#/${part.resourceId}">${part.text}</a>`;
+        }
+    }, "");
+}