diff --git a/strictdoc/export/html/generators/source_file_view_generator.py b/strictdoc/export/html/generators/source_file_view_generator.py
index 37659bfa4..880fc5fc8 100644
--- a/strictdoc/export/html/generators/source_file_view_generator.py
+++ b/strictdoc/export/html/generators/source_file_view_generator.py
@@ -5,7 +5,7 @@
 from pygments.formatters.html import HtmlFormatter
 from pygments.lexers.c_cpp import CLexer, CppLexer
 from pygments.lexers.data import YamlLexer
-from pygments.lexers.markup import TexLexer, RstLexer
+from pygments.lexers.markup import RstLexer, TexLexer
 from pygments.lexers.python import PythonLexer
 from pygments.lexers.templates import HtmlDjangoLexer
 
diff --git a/strictdoc/server/routers/main_router.py b/strictdoc/server/routers/main_router.py
index e58fcb387..cefab4f64 100644
--- a/strictdoc/server/routers/main_router.py
+++ b/strictdoc/server/routers/main_router.py
@@ -90,6 +90,7 @@
 from strictdoc.helpers.file_system import get_etag
 from strictdoc.helpers.mid import MID
 from strictdoc.helpers.parallelizer import NullParallelizer
+from strictdoc.helpers.path_filter import PathFilter
 from strictdoc.helpers.string import (
     create_safe_acronym,
     is_safe_alphanumeric_string,
@@ -1591,6 +1592,33 @@ def document_tree__create_document(
                     ),
                 )
 
+        if project_config.include_doc_paths is not None:
+            path_filter_includes = PathFilter(
+                project_config.include_doc_paths, positive_or_negative=True
+            )
+            if not path_filter_includes.match(document_path):
+                error_object.add_error(
+                    "document_path",
+                    (
+                        "Document path is not a valid path according to "
+                        "the project config's setting 'include_doc_paths': "
+                        f"{project_config.include_doc_paths}."
+                    ),
+                )
+        if project_config.exclude_doc_paths is not None:
+            path_filter_excludes = PathFilter(
+                project_config.exclude_doc_paths, positive_or_negative=False
+            )
+            if path_filter_excludes.match(document_path):
+                error_object.add_error(
+                    "document_path",
+                    (
+                        "Document path is not a valid path according to "
+                        "the project config's setting 'exclude_doc_paths': "
+                        f"{project_config.exclude_doc_paths}."
+                    ),
+                )
+
         if error_object.any_errors():
             template = env().get_template(
                 "actions/project_index/stream_new_document.jinja.html"
diff --git a/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_inside_of_exclude_filter/__init__.py b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_inside_of_exclude_filter/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_inside_of_exclude_filter/expected_output/docs/document.sdoc b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_inside_of_exclude_filter/expected_output/docs/document.sdoc
new file mode 100644
index 000000000..111cdb118
--- /dev/null
+++ b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_inside_of_exclude_filter/expected_output/docs/document.sdoc
@@ -0,0 +1,2 @@
+[DOCUMENT]
+TITLE: Document 1
diff --git a/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_inside_of_exclude_filter/expected_output/strictdoc.toml b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_inside_of_exclude_filter/expected_output/strictdoc.toml
new file mode 100644
index 000000000..db1622190
--- /dev/null
+++ b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_inside_of_exclude_filter/expected_output/strictdoc.toml
@@ -0,0 +1,9 @@
+[project]
+
+features = [
+
+]
+
+exclude_doc_paths = [
+  "tests/**",
+]
diff --git a/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_inside_of_exclude_filter/input/strictdoc.toml b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_inside_of_exclude_filter/input/strictdoc.toml
new file mode 100644
index 000000000..db1622190
--- /dev/null
+++ b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_inside_of_exclude_filter/input/strictdoc.toml
@@ -0,0 +1,9 @@
+[project]
+
+features = [
+
+]
+
+exclude_doc_paths = [
+  "tests/**",
+]
diff --git a/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_inside_of_exclude_filter/test_case.py b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_inside_of_exclude_filter/test_case.py
new file mode 100644
index 000000000..c6a1f6643
--- /dev/null
+++ b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_inside_of_exclude_filter/test_case.py
@@ -0,0 +1,43 @@
+from tests.end2end.e2e_case import E2ECase
+from tests.end2end.end2end_test_setup import End2EndTestSetup
+from tests.end2end.helpers.screens.project_index.form_add_document import (
+    Form_AddDocument,
+)
+from tests.end2end.helpers.screens.project_index.screen_project_index import (
+    Screen_ProjectIndex,
+)
+from tests.end2end.server import SDocTestServer
+
+
+class Test(E2ECase):
+    def test(self):
+        test_setup = End2EndTestSetup(path_to_test_file=__file__)
+
+        with SDocTestServer(
+            input_path=test_setup.path_to_sandbox
+        ) as test_server:
+            self.open(test_server.get_host_and_port())
+
+            screen_project_index = Screen_ProjectIndex(self)
+            screen_project_index.assert_on_screen()
+            screen_project_index.assert_empty_tree()
+
+            form_add_document: Form_AddDocument = (
+                screen_project_index.do_open_modal_form_add_document()
+            )
+            form_add_document.do_fill_in_title("Document 1")
+
+            # First, fill in an invalid path.
+            form_add_document.do_fill_in_path("tests/document")
+            form_add_document.do_form_submit_and_catch_error(
+                "Document path is not a valid path according to the project "
+                "config's setting 'exclude_doc_paths': ['tests/**']."
+            )
+
+            # Then, fill in a valid path.
+            form_add_document.do_fill_in_path("docs/document")
+            form_add_document.do_form_submit()
+
+            screen_project_index.assert_contains_document("Document 1")
+
+        assert test_setup.compare_sandbox_and_expected_output()
diff --git a/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_outside_of_include_filter/__init__.py b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_outside_of_include_filter/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_outside_of_include_filter/expected_output/docs/document.sdoc b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_outside_of_include_filter/expected_output/docs/document.sdoc
new file mode 100644
index 000000000..111cdb118
--- /dev/null
+++ b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_outside_of_include_filter/expected_output/docs/document.sdoc
@@ -0,0 +1,2 @@
+[DOCUMENT]
+TITLE: Document 1
diff --git a/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_outside_of_include_filter/expected_output/strictdoc.toml b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_outside_of_include_filter/expected_output/strictdoc.toml
new file mode 100644
index 000000000..ba7db255e
--- /dev/null
+++ b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_outside_of_include_filter/expected_output/strictdoc.toml
@@ -0,0 +1,9 @@
+[project]
+
+features = [
+
+]
+
+include_doc_paths = [
+  "docs/**",
+]
diff --git a/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_outside_of_include_filter/input/strictdoc.toml b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_outside_of_include_filter/input/strictdoc.toml
new file mode 100644
index 000000000..ba7db255e
--- /dev/null
+++ b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_outside_of_include_filter/input/strictdoc.toml
@@ -0,0 +1,9 @@
+[project]
+
+features = [
+
+]
+
+include_doc_paths = [
+  "docs/**",
+]
diff --git a/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_outside_of_include_filter/test_case.py b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_outside_of_include_filter/test_case.py
new file mode 100644
index 000000000..ef884e093
--- /dev/null
+++ b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_outside_of_include_filter/test_case.py
@@ -0,0 +1,43 @@
+from tests.end2end.e2e_case import E2ECase
+from tests.end2end.end2end_test_setup import End2EndTestSetup
+from tests.end2end.helpers.screens.project_index.form_add_document import (
+    Form_AddDocument,
+)
+from tests.end2end.helpers.screens.project_index.screen_project_index import (
+    Screen_ProjectIndex,
+)
+from tests.end2end.server import SDocTestServer
+
+
+class Test(E2ECase):
+    def test(self):
+        test_setup = End2EndTestSetup(path_to_test_file=__file__)
+
+        with SDocTestServer(
+            input_path=test_setup.path_to_sandbox
+        ) as test_server:
+            self.open(test_server.get_host_and_port())
+
+            screen_project_index = Screen_ProjectIndex(self)
+            screen_project_index.assert_on_screen()
+            screen_project_index.assert_empty_tree()
+
+            form_add_document: Form_AddDocument = (
+                screen_project_index.do_open_modal_form_add_document()
+            )
+            form_add_document.do_fill_in_title("Document 1")
+
+            # First, fill in an invalid path.
+            form_add_document.do_fill_in_path("document")
+            form_add_document.do_form_submit_and_catch_error(
+                "Document path is not a valid path according to the project "
+                "config's setting 'include_doc_paths': ['docs/**']."
+            )
+
+            # Then, fill in a valid path.
+            form_add_document.do_fill_in_path("docs/document")
+            form_add_document.do_form_submit()
+
+            screen_project_index.assert_contains_document("Document 1")
+
+        assert test_setup.compare_sandbox_and_expected_output()
diff --git a/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_with_bad_chars/test_case.py b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_with_bad_chars/test_case.py
index 3cde27a01..d3edb7587 100644
--- a/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_with_bad_chars/test_case.py
+++ b/tests/end2end/project_index/create_document/_validation/create_document_validate_document_path_with_bad_chars/test_case.py
@@ -32,3 +32,10 @@ def test(self):
                 "Document path must be relative and only contain slashes, "
                 "alphanumeric characters, and underscore symbols."
             )
+
+            form_add_document.do_fill_in_path("/test1.sdoc")
+            form_add_document.do_form_submit_and_catch_error(
+                "Document path must be relative and only contain slashes, "
+                "alphanumeric characters, and underscore symbols."
+            )
+            self.assert_text("/test1.sdoc")