diff --git a/.vscode/launch.json b/.vscode/launch.json
index 55ba1bd..951e27e 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -1,14 +1,14 @@
 {
     "version": "0.2.0",
     "configurations": [
-
         {
             "name": "Python Debugger: Current File with Arguments",
             "type": "debugpy",
             "request": "launch",
             "program": "${file}",
             "console": "integratedTerminal",
-            "args": "${command:pickArgs}"
-        }
+            "args": "--port=53535 --root-path=/proxy/53535 --navigate *.zip"
+        },
+
     ]
 }
\ No newline at end of file
diff --git a/main.py b/main.py
index 4d24ac2..a9f8275 100644
--- a/main.py
+++ b/main.py
@@ -23,6 +23,7 @@ file_mapping: dict[str, str] = {}
 indexers = []
 sorted_hashes: list[str] = []
 navigate_enabled = False
+root_path: str = ""
 
 
 class FileIndexer:
@@ -166,8 +167,13 @@ INDEXER_MAP = {".zip": ZipFileIndexer}
 
 def initialize_server(args: argparse.Namespace):
     """Initialize the server with directory or glob indexing"""
-    global file_mapping, indexers, sorted_hashes, navigate_enabled
+    global file_mapping, indexers, sorted_hashes, navigate_enabled, root_path
     navigate_enabled = args.navigate
+    root_path = getattr(args, "root_path", None) or ""
+    if root_path:
+        # Ensure root_path starts with / but not ends with /
+        root_path = "/" + root_path.strip("/")
+        app.root_path = root_path
 
     src_path = Path(args.source)
 
@@ -259,7 +265,7 @@ def _build_url(
     file_hash: str, order: str | None = None, delay: int | None = None
 ) -> str:
     """Build a URL with optional order/delay query parameters."""
-    base = f"/{file_hash}"
+    base = f"{root_path}/{file_hash}"
     if order is not None and delay is not None:
         return f"{base}?order={order}&delay={delay}"
     return base
@@ -282,7 +288,7 @@ async def root(
             ):
                 _raise_unauthorized()
 
-    return RedirectResponse(url=_build_url(random_hash, order, delay))
+    return RedirectResponse(url=_build_url(random_hash, order, delay), status_code=307)
 
 
 def _get_navigation_data(file_hash: str, order: str | None = None):
@@ -355,8 +361,8 @@ def _render_page(
                 prev_path, order=current_order, delay=current_delay
             )
         else:
-            next_url = f"/navigate/{next_path}"
-            prev_url = f"/navigate/{prev_path}"
+            next_url = f"{root_path}/navigate/{next_path}"
+            prev_url = f"{root_path}/navigate/{prev_path}"
     else:
         if current_order is not None:
             next_url = _build_url(
@@ -370,8 +376,12 @@ def _render_page(
                 delay=current_delay,
             )
         else:
-            next_url = "/{next_hash}".format(next_hash=navigation_data["next_hash"])
-            prev_url = "/{prev_hash}".format(prev_hash=navigation_data["prev_hash"])
+            next_url = "{root_path}/{next_hash}".format(
+                root_path=root_path, next_hash=navigation_data["next_hash"]
+            )
+            prev_url = "{root_path}/{prev_hash}".format(
+                root_path=root_path, prev_hash=navigation_data["prev_hash"]
+            )
 
     # Build the toggle URL (alternate view mode)
     file_path = navigation_data.get("filename", "")
@@ -404,7 +414,9 @@ def _render_page(
         sidebar_class = ""
 
     content = template.substitute(
-        img_url="/api/{file_hash}/data".format(file_hash=navigation_data["file_hash"]),
+        img_url="{root_path}/api/{file_hash}/data".format(
+            root_path=root_path, file_hash=navigation_data["file_hash"]
+        ),
         image_click_url=image_click_url or _get_random_hash(),
         next_url=next_url,
         prev_url=prev_url,
@@ -465,7 +477,9 @@ async def hash_page(
         image_click_url = _build_url(file_hash)
 
         # Create pause button to stop auto-refresh
-        pause_button = f'<a href="{file_hash}" class="play-btn" title="Pause">⏸</a>'
+        pause_button = (
+            f'<a href="{root_path}/{file_hash}" class="play-btn" title="Pause">⏸</a>'
+        )
 
         return _render_page(
             navigation_data,
@@ -478,7 +492,7 @@ async def hash_page(
     else:
         # Browse mode
         play_button = (
-            f'<a href="/{file_hash}?order=next&delay=5" '
+            f'<a href="{root_path}/{file_hash}?order=next&delay=5" '
             'class="play-btn" title="Play next 5">⏵</a>'
         )
         return _render_page(
@@ -606,7 +620,7 @@ def _build_navigate_url(
     path: str, order: str | None = None, delay: int | None = None
 ) -> str:
     """Build a /navigate URL with optional order/delay query parameters."""
-    base = f"/navigate/{path}"
+    base = f"{root_path}/navigate/{path}"
     if order is not None and delay is not None:
         return f"{base}?order={order}&delay={delay}"
     return base
@@ -704,24 +718,15 @@ def _render_folder_index_html(
     all_paths = _collect_zip_paths()
     lines: list[str] = []
 
-    # Build root-level folders and files
-    root_folders: set[str] = set()
-    root_files: set[str] = set()
-    for p in all_paths:
-        if "/" in p:
-            root_folders.add(p.split("/", 1)[0])
-        else:
-            root_files.add(p)
-
     # Breadcrumb
     lines.append("<nav class='breadcrumb'>")
-    lines.append('<a href="/navigate/">/</a>')
+    lines.append(f'<a href="{root_path}/navigate/">/</a>')
     if current_path:
         parts = current_path.split("/")
         accumulated = ""
         for part in parts[:-1]:
             accumulated += f"{part}/"
-            lines.append(f'<a href="/navigate/{accumulated}">{part}</a>')
+            lines.append(f'<a href="{root_path}/navigate/{accumulated}">{part}</a>')
     lines.append("</nav>")
 
     def _render_folder(folder_prefix: str, depth: int = 0) -> list[str]:
@@ -744,7 +749,7 @@ def _render_folder_index_html(
             folder_path = f"{prefix}{folder}/" if prefix else f"{folder}/"
             result.append(
                 f'<div class="index-item folder">'
-                f'{indent}<a href="/navigate/{folder_path}">📁 {folder}</a>'
+                f'{indent}<a href="{root_path}/navigate/{folder_path}">📁 {folder}</a>'
                 f"</div>"
             )
             result.extend(_render_folder(folder_path, depth + 1))
@@ -758,7 +763,7 @@ def _render_folder_index_html(
                 href_params = f"?order={current_order}&delay={current_delay}"
             result.append(
                 f'<div class="{cls}">'
-                f'{indent}<a href="/navigate/{file_path}{href_params}">📄 {file}</a>'
+                f'{indent}<a href="{root_path}/navigate/{file_path}{href_params}">📄 {file}</a>'
                 f"</div>"
             )
 
@@ -884,9 +889,7 @@ async def navigate_page(
         image_click_url = _build_navigate_url(path)
 
         # Create pause button to stop auto-refresh
-        pause_button = (
-            f'<a href="/navigate/{path}" class="play-btn" title="Pause">⏸</a>'
-        )
+        pause_button = f'<a href="{root_path}/navigate/{path}" class="play-btn" title="Pause">⏸</a>'
 
         return _render_page(
             navigation_data,
@@ -900,12 +903,12 @@ async def navigate_page(
     else:
         # Browse mode
         play_button = (
-            f'<a href="/navigate/{path}?order=next&delay=5" '
+            f'<a href="{root_path}/navigate/{path}?order=next&delay=5" '
             'class="play-btn" title="Play next 5">⏵</a>'
         )
         random_path = _get_random_navigate_path()
         image_click_url = (
-            f"/navigate/{random_path}" if random_path else _get_random_hash()
+            f"{root_path}/navigate/{random_path}" if random_path else _get_random_hash()
         )
         return _render_page(
             navigation_data,
@@ -934,6 +937,12 @@ if __name__ == "__main__":
         action="store_true",
         help="Enable path-based navigation (/navigate/{path})",
     )
+    parser.add_argument(
+        "--root-path",
+        type=str,
+        default=None,
+        help="URL path prefix (e.g., /images for serving at example.com/images)",
+    )
     args = parser.parse_args()
 
     initialize_server(args)
diff --git a/tests/conftest.py b/tests/conftest.py
index 1335adb..cb7a6c1 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -18,6 +18,8 @@ def _reset_state() -> None:
     main.indexers.clear()
     main.sorted_hashes.clear()
     main.navigate_enabled = False
+    main.root_path = ""
+    main.app.root_path = ""
 
 
 @pytest.fixture(autouse=True)
@@ -86,6 +88,7 @@ def args_directory(sample_files: dict[str, Path], tmp_path: Path) -> argparse.Na
         port=0,
         salt="test-salt",
         navigate=False,
+        root_path=None,
     )
 
 
@@ -98,6 +101,7 @@ def args_zip(sample_zip: dict[str, Path], tmp_path: Path) -> argparse.Namespace:
         port=0,
         salt="test-salt",
         navigate=False,
+        root_path=None,
     )
 
 
@@ -112,6 +116,7 @@ def args_zip_navigate(
         port=0,
         salt="test-salt",
         navigate=True,
+        root_path=None,
     )
 
 
@@ -190,6 +195,7 @@ def args_encrypted_zip(
         port=0,
         salt="test-salt",
         navigate=False,
+        root_path=None,
     )
 
 
diff --git a/tests/test_root_path.py b/tests/test_root_path.py
new file mode 100644
index 0000000..78e1ad3
--- /dev/null
+++ b/tests/test_root_path.py
@@ -0,0 +1,181 @@
+"""Tests for --root-path URL prefix support."""
+
+import argparse
+from collections.abc import Generator
+from pathlib import Path
+
+import pytest
+from httpx import ASGITransport, AsyncClient
+
+import main
+
+
+@pytest.fixture
+def args_directory_with_root(
+    sample_files: dict[str, Path], tmp_path: Path
+) -> argparse.Namespace:
+    """Argparse namespace with root_path set."""
+    return argparse.Namespace(
+        source=str(tmp_path),
+        host="127.0.0.1",
+        port=0,
+        salt="test-salt",
+        navigate=False,
+        root_path="/images",
+    )
+
+
+@pytest.fixture
+def initialized_dir_with_root(args_directory_with_root: argparse.Namespace) -> None:
+    """Initialize the server with sample directory files and root_path."""
+    main.initialize_server(args_directory_with_root)
+
+
+@pytest.fixture
+async def client_dir_with_root(
+    initialized_dir_with_root: None,
+) -> Generator[AsyncClient]:
+    """Async HTTP client against the app initialized with root_path."""
+    transport = ASGITransport(app=main.app)
+    async with AsyncClient(transport=transport, base_url="http://test") as ac:
+        yield ac
+
+
+class TestRootPathGlobal:
+    """Tests that root_path is set correctly on initialization."""
+
+    def test_root_path_set_from_args(self, args_directory_with_root):
+        """root_path global is set from args."""
+        main.initialize_server(args_directory_with_root)
+        assert main.root_path == "/images"
+
+    def test_root_path_normalized(self, sample_files, tmp_path):
+        """root_path is normalized (leading/trailing slashes handled)."""
+        args = argparse.Namespace(
+            source=str(tmp_path),
+            host="127.0.0.1",
+            port=0,
+            salt="test-salt",
+            navigate=False,
+            root_path="images/",
+        )
+        main.initialize_server(args)
+        assert main.root_path == "/images"
+
+    def test_root_path_empty_when_not_provided(self, args_directory):
+        """root_path is empty string when not provided."""
+        main.initialize_server(args_directory)
+        assert main.root_path == ""
+
+    def test_app_root_path_set(self, args_directory_with_root):
+        """FastAPI app.root_path is set for proper URL generation."""
+        main.initialize_server(args_directory_with_root)
+        assert main.app.root_path == "/images"
+
+
+class TestRootPathURLBuilders:
+    """Tests that URL builder functions include root_path."""
+
+    def test_build_url_includes_root_path(self, initialized_dir_with_root):
+        """_build_url includes root_path prefix."""
+        url = main._build_url("abc123")
+        assert url == "/images/abc123"
+
+    def test_build_url_with_params_includes_root_path(self, initialized_dir_with_root):
+        """_build_url with order/delay includes root_path prefix."""
+        url = main._build_url("abc123", order="next", delay=5)
+        assert url == "/images/abc123?order=next&delay=5"
+
+    def test_build_navigate_url_includes_root_path(self, initialized_dir_with_root):
+        """_build_navigate_url includes root_path prefix."""
+        url = main._build_navigate_url("folder/file.txt")
+        assert url == "/images/navigate/folder/file.txt"
+
+    def test_build_navigate_url_with_params_includes_root_path(
+        self, initialized_dir_with_root
+    ):
+        """_build_navigate_url with order/delay includes root_path prefix."""
+        url = main._build_navigate_url("folder/file.txt", order="random", delay=3)
+        assert url == "/images/navigate/folder/file.txt?order=random&delay=3"
+
+    def test_build_url_no_root_when_empty(self, initialized_dir):
+        """_build_url has no prefix when root_path is empty."""
+        url = main._build_url("abc123")
+        assert url == "/abc123"
+
+
+class TestRootPathEndpoints:
+    """Tests that endpoint responses include root_path in URLs."""
+
+    async def test_root_redirect_includes_root_path(
+        self, client_dir_with_root: AsyncClient
+    ):
+        """Root redirect location includes root_path."""
+        response = await client_dir_with_root.get("/", follow_redirects=False)
+        assert response.status_code == 307
+        location = response.headers["location"]
+        assert location.startswith("/images/")
+
+    async def test_root_redirect_with_params_includes_root_path(
+        self, client_dir_with_root: AsyncClient
+    ):
+        """Root redirect with order/delay includes root_path."""
+        response = await client_dir_with_root.get(
+            "/", params={"order": "next", "delay": 5}, follow_redirects=False
+        )
+        assert response.status_code == 307
+        location = response.headers["location"]
+        assert location.startswith("/images/")
+        assert "order=next" in location
+        assert "delay=5" in location
+
+    async def test_hash_page_image_url_includes_root_path(
+        self, client_dir_with_root: AsyncClient
+    ):
+        """Hash page img_url includes root_path."""
+        file_hash = list(main.file_mapping.keys())[0]
+        response = await client_dir_with_root.get(f"/{file_hash}")
+        assert response.status_code == 200
+        assert "/images/api/" in response.text
+
+    async def test_hash_page_nav_urls_include_root_path(
+        self, client_dir_with_root: AsyncClient
+    ):
+        """Hash page prev/next URLs include root_path."""
+        file_hash = list(main.file_mapping.keys())[0]
+        response = await client_dir_with_root.get(f"/{file_hash}")
+        assert response.status_code == 200
+        # Check that chevron links use root_path
+        import re
+
+        # Find href values on chevron elements
+        chevrons = re.findall(
+            r'class="chevron (left|right)"[^>]*href="([^"]*)"', response.text
+        )
+        for direction, href in chevrons:
+            assert href.startswith(
+                "/images/"
+            ), f"Chevron {direction} href {href} missing root_path"
+
+    async def test_hash_page_play_button_includes_root_path(
+        self, client_dir_with_root: AsyncClient
+    ):
+        """Hash page play button URL includes root_path."""
+        file_hash = list(main.file_mapping.keys())[0]
+        response = await client_dir_with_root.get(f"/{file_hash}")
+        assert response.status_code == 200
+        # Play button should have root_path in its href
+        assert "/images/" in response.text
+
+    async def test_hash_page_refresh_includes_root_path(
+        self, client_dir_with_root: AsyncClient
+    ):
+        """Hash page in refresh mode includes root_path in meta refresh."""
+        file_hash = list(main.file_mapping.keys())[0]
+        response = await client_dir_with_root.get(
+            f"/{file_hash}", params={"order": "next", "delay": 5}
+        )
+        assert response.status_code == 200
+        assert 'http-equiv="refresh"' in response.text
+        # The refresh URL should include root_path
+        assert "/images/" in response.text