diff --git a/browser_cli/cli.py b/browser_cli/cli.py
index 17b524a..223d3d5 100755
--- a/browser_cli/cli.py
+++ b/browser_cli/cli.py
@@ -187,8 +187,8 @@ def _print_version(ctx, param, value):
     help="Browser profile alias to target (required when multiple browsers are active).",
 )
 @click.option(
-    "--remote", default=None, metavar="HOST:PORT",
-    help="Connect to a remote browser exposed via 'browser-cli serve'.",
+    "--remote", default=None, metavar="HOST[:PORT]",
+    help="Connect to a remote browser exposed via 'browser-cli serve'. Domains default to port 443.",
 )
 @click.option(
     "--key", default=None, metavar="PATH",
diff --git a/browser_cli/client.py b/browser_cli/client.py
index 3bffe7b..eed27f8 100644
--- a/browser_cli/client.py
+++ b/browser_cli/client.py
@@ -10,6 +10,7 @@ Profile selection order:
 """
 import json
 import os
+import re
 import socket
 import struct
 import uuid
@@ -32,6 +33,39 @@ REGISTRY_PATH = registry_path()
 REMOTE_REGISTRY_PATH = Path(os.environ.get("XDG_CONFIG_HOME", Path.home() / ".config")) / "browser-cli" / "remotes.json"
 _DEFAULT_KEY_PATH = Path(os.environ.get("XDG_CONFIG_HOME", str(Path.home() / ".config"))) / "browser-cli" / "client.key.pem"
 
+_DEFAULT_REMOTE_PORT = 443
+
+
+def _looks_like_domain(host: str) -> bool:
+    """True if host looks like a domain name rather than an IP address or localhost."""
+    if host in {"localhost", "127.0.0.1", "::1"}:
+        return False
+    if re.match(r'^\d{1,3}(\.\d{1,3}){3}$', host):
+        return False
+    return '.' in host and any(c.isalpha() for c in host)
+
+
+def _normalize_endpoint(endpoint: str) -> str:
+    """Strip :443 from domain-like endpoints so they are stored without the default port."""
+    if not endpoint:
+        return endpoint
+    host, sep, port = endpoint.rpartition(":")
+    if sep and port == "443" and _looks_like_domain(host):
+        return host
+    return endpoint
+
+
+def _resolve_connect_endpoint(endpoint: str) -> str:
+    """Return host:port for TCP connection; domain without port defaults to :443."""
+    _, sep, _ = endpoint.rpartition(":")
+    if not sep:
+        if _looks_like_domain(endpoint):
+            return f"{endpoint}:{_DEFAULT_REMOTE_PORT}"
+        raise BrowserNotConnected(
+            f"Invalid remote endpoint '{endpoint}': expected host:port"
+        )
+    return endpoint
+
 
 class BrowserNotConnected(Exception):
     """Raised when the native host socket is not available."""
@@ -67,7 +101,8 @@ def _load_remotes() -> dict[str, dict[str, str]]:
         return {}
     if not isinstance(data, dict):
         return {}
-    return {str(endpoint): cfg for endpoint, cfg in data.items() if isinstance(cfg, dict)}
+    # normalize keys so old entries stored as "domain:443" match current lookups
+    return {_normalize_endpoint(str(endpoint)): cfg for endpoint, cfg in data.items() if isinstance(cfg, dict)}
 
 
 
@@ -108,8 +143,11 @@ def key_for_remote(endpoint: str | None) -> str | None:
 
 def _remote_display_name(endpoint: str, profile_name: str, display_name: str) -> str:
     host, sep, port = endpoint.rpartition(":")
-    remote_name = host if sep and port == "8765" else endpoint
-    return f"{remote_name}:{display_name or profile_name}"
+    if sep and (port == "8765" or (port == "443" and _looks_like_domain(host))):
+        display_endpoint = host
+    else:
+        display_endpoint = endpoint  # normalized domain (no port) or non-default port
+    return f"{display_endpoint}:{display_name or profile_name}"
 
 
 def remote_browser_targets(endpoint: str, key=None) -> list[BrowserTarget]:
@@ -239,9 +277,8 @@ def _load_private_key(key_path: "Path | str | None" = None):
 
 
 def _send_remote(endpoint: str, msg: dict, private_key=None) -> bytes | None:
-    host, _, port_str = endpoint.rpartition(":")
-    if not host or not port_str:
-        raise BrowserNotConnected(f"Invalid remote endpoint '{endpoint}': expected host:port")
+    connect_ep = _resolve_connect_endpoint(endpoint)
+    host, _, port_str = connect_ep.rpartition(":")
     port = int(port_str)
     raw_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
     raw_sock.settimeout(30)
@@ -313,6 +350,8 @@ def send_command(command: str, args: dict | None = None, profile: str | None = N
     """Send a command to the browser and return the response data."""
     requested_profile = profile or os.environ.get("BROWSER_CLI_PROFILE")
     remote_endpoint = remote or os.environ.get("BROWSER_CLI_REMOTE")
+    if remote_endpoint:
+        remote_endpoint = _normalize_endpoint(remote_endpoint)
     remote_alias_target = None
     if not remote_endpoint and requested_profile:
         remote_alias_target = remote_target_for_alias(requested_profile)
diff --git a/extension/manifest.json b/extension/manifest.json
index 4b30aa8..1e5f276 100644
--- a/extension/manifest.json
+++ b/extension/manifest.json
@@ -1,7 +1,7 @@
 {
   "manifest_version": 3,
   "name": "browser-cli",
-  "version": "0.9.2",
+  "version": "0.9.4",
   "description": "Control your browser from the terminal via browser-cli",
   "permissions": [
     "tabs",
diff --git a/pyproject.toml b/pyproject.toml
index 1fc348c..5f4a369 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "browser-cli"
-version = "0.9.3"
+version = "0.9.4"
 description = "Control your real running browser from the terminal via a browser extension"
 requires-python = ">=3.10"
 dependencies = [
diff --git a/tests/test_client.py b/tests/test_client.py
index 1e13873..23f9041 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -6,6 +6,9 @@ import pytest
 from browser_cli.client import (
     BrowserNotConnected,
     BrowserTarget,
+    _looks_like_domain,
+    _normalize_endpoint,
+    _resolve_connect_endpoint,
     _resolve_socket,
     active_browser_targets,
     display_browser_name,
@@ -238,6 +241,120 @@ def test_active_browser_targets_includes_remote_targets(monkeypatch, tmp_path):
     assert targets[0].remote == endpoint
 
 
+def test_looks_like_domain():
+    assert _looks_like_domain("browsercli.yiprawr.dev") is True
+    assert _looks_like_domain("browser-host.example") is True
+    assert _looks_like_domain("sub.domain.org") is True
+    assert _looks_like_domain("localhost") is False
+    assert _looks_like_domain("127.0.0.1") is False
+    assert _looks_like_domain("192.168.1.100") is False
+    assert _looks_like_domain("host") is False  # no dot
+
+
+def test_normalize_endpoint_strips_443_for_domains():
+    assert _normalize_endpoint("browsercli.yiprawr.dev:443") == "browsercli.yiprawr.dev"
+    assert _normalize_endpoint("browsercli.yiprawr.dev") == "browsercli.yiprawr.dev"
+    assert _normalize_endpoint("192.168.1.1:443") == "192.168.1.1:443"  # IP: keep port
+    assert _normalize_endpoint("localhost:443") == "localhost:443"       # localhost: keep port
+    assert _normalize_endpoint("host:8765") == "host:8765"               # non-443 port: unchanged
+    assert _normalize_endpoint("browsercli.yiprawr.dev:8765") == "browsercli.yiprawr.dev:8765"
+
+
+def test_resolve_connect_endpoint_adds_443_for_domain():
+    assert _resolve_connect_endpoint("browsercli.yiprawr.dev") == "browsercli.yiprawr.dev:443"
+    assert _resolve_connect_endpoint("browsercli.yiprawr.dev:443") == "browsercli.yiprawr.dev:443"
+    assert _resolve_connect_endpoint("browsercli.yiprawr.dev:8765") == "browsercli.yiprawr.dev:8765"
+    assert _resolve_connect_endpoint("host:8765") == "host:8765"
+
+
+def test_resolve_connect_endpoint_raises_for_bare_non_domain():
+    with pytest.raises(BrowserNotConnected, match="expected host:port"):
+        _resolve_connect_endpoint("localhost")
+
+
+def test_send_command_normalizes_domain_port_443(monkeypatch):
+    """--remote domain:443 is normalized; _send_remote gets the portless domain."""
+    monkeypatch.delenv("BROWSER_CLI_PROFILE", raising=False)
+    monkeypatch.delenv("BROWSER_CLI_REMOTE", raising=False)
+    sent_to = {}
+
+    monkeypatch.setattr(
+        "browser_cli.client.remote_browser_targets",
+        lambda endpoint, key=None: [BrowserTarget("default", f"{endpoint}:default", "", remote=endpoint)],
+    )
+
+    def fake_send_remote(endpoint, msg, private_key=None):
+        sent_to["endpoint"] = endpoint
+        return json.dumps({"success": True, "data": "ok"}).encode()
+
+    monkeypatch.setattr("browser_cli.client._send_remote", fake_send_remote)
+
+    result = send_command("tabs.list", remote="browsercli.yiprawr.dev:443")
+    assert result == "ok"
+    assert sent_to["endpoint"] == "browsercli.yiprawr.dev"  # stored/routed without port
+
+
+def test_send_command_domain_without_port_defaults_to_443(monkeypatch):
+    """--remote domain (no port) is treated as :443."""
+    monkeypatch.delenv("BROWSER_CLI_PROFILE", raising=False)
+    monkeypatch.delenv("BROWSER_CLI_REMOTE", raising=False)
+    sent_to = {}
+
+    monkeypatch.setattr(
+        "browser_cli.client.remote_browser_targets",
+        lambda endpoint, key=None: [BrowserTarget("default", f"{endpoint}:default", "", remote=endpoint)],
+    )
+
+    def fake_send_remote(endpoint, msg, private_key=None):
+        sent_to["endpoint"] = endpoint
+        return json.dumps({"success": True, "data": "ok"}).encode()
+
+    monkeypatch.setattr("browser_cli.client._send_remote", fake_send_remote)
+
+    result = send_command("tabs.list", remote="browsercli.yiprawr.dev")
+    assert result == "ok"
+    assert sent_to["endpoint"] == "browsercli.yiprawr.dev"
+
+
+def test_domain_display_name_omits_port(monkeypatch, tmp_path):
+    """Domain endpoints stored without :443 display as 'domain:profile', not 'domain:443:profile'."""
+    remotes_path = tmp_path / "remotes.json"
+    endpoint = "browsercli.yiprawr.dev"
+    remotes_path.write_text(json.dumps({endpoint: {}}), encoding="utf-8")
+    monkeypatch.setattr("browser_cli.client.REGISTRY_PATH", tmp_path / "missing-registry.json")
+    monkeypatch.setattr("browser_cli.client.REMOTE_REGISTRY_PATH", remotes_path)
+
+    def fake_send_command(command, args=None, profile=None, remote=None, key=None):
+        return [{"profile": "automatisation", "displayName": "automatisation"}]
+
+    monkeypatch.setattr("browser_cli.client.send_command", fake_send_command)
+
+    targets = active_browser_targets()
+
+    assert len(targets) == 1
+    assert targets[0].display_name == "browsercli.yiprawr.dev:automatisation"
+    assert targets[0].remote == endpoint
+
+
+def test_domain_display_name_backward_compat_with_stored_443(monkeypatch, tmp_path):
+    """Old remotes.json with :443 still displays cleanly without the port."""
+    remotes_path = tmp_path / "remotes.json"
+    endpoint = "browsercli.yiprawr.dev:443"  # old format
+    remotes_path.write_text(json.dumps({endpoint: {}}), encoding="utf-8")
+    monkeypatch.setattr("browser_cli.client.REGISTRY_PATH", tmp_path / "missing-registry.json")
+    monkeypatch.setattr("browser_cli.client.REMOTE_REGISTRY_PATH", remotes_path)
+
+    def fake_send_command(command, args=None, profile=None, remote=None, key=None):
+        return [{"profile": "automatisation", "displayName": "automatisation"}]
+
+    monkeypatch.setattr("browser_cli.client.send_command", fake_send_command)
+
+    targets = active_browser_targets()
+
+    assert len(targets) == 1
+    assert targets[0].display_name == "browsercli.yiprawr.dev:automatisation"
+
+
 def test_send_command_auto_saves_and_reuses_key_for_remote(monkeypatch, tmp_path):
     """--key agent is saved on first use; omitting --key on subsequent calls reuses it."""
     import json as _json
diff --git a/uv.lock b/uv.lock
index ca8c328..f4c053f 100644
--- a/uv.lock
+++ b/uv.lock
@@ -4,7 +4,7 @@ requires-python = ">=3.10"
 
 [[package]]
 name = "browser-cli"
-version = "0.9.3"
+version = "0.9.4"
 source = { editable = "." }
 dependencies = [
     { name = "click" },