diff --git a/muxplex/main.py b/muxplex/main.py
index 7e30a70..505e27e 100644
--- a/muxplex/main.py
+++ b/muxplex/main.py
@@ -14,6 +14,7 @@ import logging
 import os
 import pathlib
 import pwd
+import socket
 import subprocess
 import sys
 import time
@@ -282,11 +283,15 @@ class CreateSessionPayload(BaseModel):
 
 
 # ---------------------------------------------------------------------------
-# Frontend directory
+# Frontend directory + hostname
 # ---------------------------------------------------------------------------
 
 _FRONTEND_DIR = pathlib.Path(__file__).parent / "frontend"
 
+# Short hostname (no domain) injected into page titles so browser tabs show
+# which machine each muxplex instance is running on.
+_HOSTNAME = socket.gethostname().split(".")[0]
+
 
 # ---------------------------------------------------------------------------
 # Routes
@@ -564,6 +569,18 @@ async def terminal_ws_proxy(websocket: WebSocket) -> None:
 # ---------------------------------------------------------------------------
 
 
+@app.get("/", response_class=HTMLResponse)
+@app.get("/index.html", response_class=HTMLResponse)
+async def index_page():
+    """Serve index.html with hostname injected into the page title."""
+    html = (_FRONTEND_DIR / "index.html").read_text()
+    html = html.replace(
+        "<title>muxplex</title>",
+        f"<title>{_HOSTNAME} \u2014 muxplex</title>",
+    )
+    return HTMLResponse(html)
+
+
 @app.get("/login", response_class=HTMLResponse)
 async def login_page():
     """Serve branded login.html with injected window.MUXPLEX_AUTH containing auth mode and username."""
@@ -573,6 +590,10 @@ async def login_page():
     html = html.replace(
         "</head>", f"<script>window.MUXPLEX_AUTH = {mode_data};</script></head>"
     )
+    html = html.replace(
+        "<title>Sign in \u2014 muxplex</title>",
+        f"<title>Sign in \u2014 {_HOSTNAME} \u2014 muxplex</title>",
+    )
     return HTMLResponse(html)