diff --git a/esphome/components/web_server/web_server.cpp b/esphome/components/web_server/web_server.cpp
index ec536910e54..1683492da76 100644
--- a/esphome/components/web_server/web_server.cpp
+++ b/esphome/components/web_server/web_server.cpp
@@ -336,13 +336,6 @@ void DeferredUpdateEventSourceList::on_client_disconnect_(DeferredUpdateEventSou
 
 WebServer::WebServer(web_server_base::WebServerBase *base) : base_(base) {}
 
-#ifdef USE_WEBSERVER_CSS_INCLUDE
-void WebServer::set_css_include(const char *css_include) { this->css_include_ = css_include; }
-#endif
-#ifdef USE_WEBSERVER_JS_INCLUDE
-void WebServer::set_js_include(const char *js_include) { this->js_include_ = js_include; }
-#endif
-
 json::SerializationBuffer<> WebServer::get_config_json() {
   json::JsonBuilder builder;
   JsonObject root = builder.root();
diff --git a/esphome/components/web_server/web_server.h b/esphome/components/web_server/web_server.h
index 0fbe4ec5515..d60b39278aa 100644
--- a/esphome/components/web_server/web_server.h
+++ b/esphome/components/web_server/web_server.h
@@ -204,14 +204,14 @@ class WebServer final : public Controller, public Component, public AsyncWebHand
    *
    * @param css_url The url to the web server stylesheet.
    */
-  void set_css_url(const char *css_url);
+  void set_css_url(const char *css_url) { this->css_url_ = css_url; }
 
   /** Set the URL to the script that's embedded in the index page. Defaults to
    * https://oi.esphome.io/v1/webserver-v1.min.js
    *
    * @param js_url The url to the web server script.
    */
-  void set_js_url(const char *js_url);
+  void set_js_url(const char *js_url) { this->js_url_ = js_url; }
 #endif
 
 #ifdef USE_WEBSERVER_CSS_INCLUDE
@@ -219,7 +219,7 @@ class WebServer final : public Controller, public Component, public AsyncWebHand
    *
    * @param css_include Local path to web server script.
    */
-  void set_css_include(const char *css_include);
+  void set_css_include(const char *css_include) { this->css_include_ = css_include; }
 #endif
 
 #ifdef USE_WEBSERVER_JS_INCLUDE
@@ -227,7 +227,7 @@ class WebServer final : public Controller, public Component, public AsyncWebHand
    *
    * @param js_include Local path to web server script.
    */
-  void set_js_include(const char *js_include);
+  void set_js_include(const char *js_include) { this->js_include_ = js_include; }
 #endif
 
   /** Determine whether internal components should be displayed on the web server.
diff --git a/esphome/components/web_server/web_server_v1.cpp b/esphome/components/web_server/web_server_v1.cpp
index 85a4e80541b..08654e353a9 100644
--- a/esphome/components/web_server/web_server_v1.cpp
+++ b/esphome/components/web_server/web_server_v1.cpp
@@ -69,10 +69,6 @@ void write_row(AsyncResponseStream *stream, EntityBase *obj, const std::string &
   stream->print("</tr>");
 }
 
-void WebServer::set_css_url(const char *css_url) { this->css_url_ = css_url; }
-
-void WebServer::set_js_url(const char *js_url) { this->js_url_ = js_url; }
-
 void WebServer::handle_index_request(AsyncWebServerRequest *request) {
   AsyncResponseStream *stream = request->beginResponseStream(ESPHOME_F("text/html"));
   const auto &title = App.get_name();