diff --git a/assets/js/app.ts b/assets/js/app.ts
index 023d254fc..bef8d56a0 100644
--- a/assets/js/app.ts
+++ b/assets/js/app.ts
@@ -6,6 +6,7 @@ import App from "./views/App.vue";
 import setupRouter from "./router.ts";
 import setupI18n from "./i18n.ts";
 import { watchThemeChanges } from "./theme.ts";
+import { applyUrlSettings } from "./urlSettings.ts";
 import { appDetection, sendToApp } from "./utils/native";
 import store from "./store";
 import type { Notification } from "./types/evcc";
@@ -74,6 +75,8 @@ const app = createApp(
   })
 );
 
+applyUrlSettings();
+
 const i18n = setupI18n();
 const head = createHead();
 
diff --git a/assets/js/components/GlobalSettings/UserInterfaceSettings.vue b/assets/js/components/GlobalSettings/UserInterfaceSettings.vue
index b7997c583..24f07d0ac 100644
--- a/assets/js/components/GlobalSettings/UserInterfaceSettings.vue
+++ b/assets/js/components/GlobalSettings/UserInterfaceSettings.vue
@@ -94,10 +94,7 @@ import { getThemePreference, setThemePreference } from "@/theme.ts";
 import { getUnits, setUnits, is12hFormat, set12hFormat } from "@/units";
 import { isApp } from "@/utils/native";
 import { defineComponent, type PropType } from "vue";
-import { LENGTH_UNIT, THEME, type UiLoadpoint } from "@/types/evcc";
-
-const TIME_12H = "12";
-const TIME_24H = "24";
+import { LENGTH_UNIT, THEME, TIME_FORMAT, type UiLoadpoint } from "@/types/evcc";
 
 export default defineComponent({
 	name: "UserInterfaceSettings",
@@ -110,11 +107,11 @@ export default defineComponent({
 			theme: getThemePreference(),
 			language: getLocalePreference() || "",
 			unit: getUnits(),
-			timeFormat: is12hFormat() ? TIME_12H : TIME_24H,
+			timeFormat: is12hFormat() ? TIME_FORMAT.H12 : TIME_FORMAT.H24,
 			fullscreenActive: false,
 			THEMES: Object.values(THEME),
 			UNITS: Object.values(LENGTH_UNIT),
-			TIME_FORMATS: [TIME_24H, TIME_12H],
+			TIME_FORMATS: [TIME_FORMAT.H24, TIME_FORMAT.H12],
 		};
 	},
 	computed: {
@@ -139,7 +136,7 @@ export default defineComponent({
 			setUnits(value);
 		},
 		timeFormat(value) {
-			set12hFormat(value === TIME_12H);
+			set12hFormat(value === TIME_FORMAT.H12);
 		},
 		theme(value) {
 			setThemePreference(value);
diff --git a/assets/js/types/evcc.ts b/assets/js/types/evcc.ts
index bb8305bf5..031e5d2c8 100644
--- a/assets/js/types/evcc.ts
+++ b/assets/js/types/evcc.ts
@@ -289,6 +289,11 @@ export enum LENGTH_UNIT {
   MILES = "mi",
 }
 
+export enum TIME_FORMAT {
+  H12 = "12",
+  H24 = "24",
+}
+
 export interface Loadpoint {
   name: string;
   batteryBoost: boolean;
diff --git a/assets/js/urlSettings.ts b/assets/js/urlSettings.ts
new file mode 100644
index 000000000..bf17ef2f7
--- /dev/null
+++ b/assets/js/urlSettings.ts
@@ -0,0 +1,41 @@
+import settings from "./settings";
+import { LOCALES } from "./i18n";
+import { LENGTH_UNIT, THEME, TIME_FORMAT } from "./types/evcc";
+
+export function applyUrlSettings() {
+  const url = new URL(window.location.href);
+  const params = url.searchParams;
+  let touched = false;
+
+  const theme = params.get("theme");
+  if (theme && Object.values(THEME).includes(theme as THEME)) {
+    settings.theme = theme as THEME;
+    touched = true;
+  }
+
+  const lang = params.get("lang");
+  if (lang === "auto") {
+    settings.locale = null;
+    touched = true;
+  } else if (lang && lang in LOCALES) {
+    settings.locale = lang as keyof typeof LOCALES;
+    touched = true;
+  }
+
+  const unit = params.get("unit");
+  if (unit && Object.values(LENGTH_UNIT).includes(unit as LENGTH_UNIT)) {
+    settings.unit = unit as LENGTH_UNIT;
+    touched = true;
+  }
+
+  const format = params.get("format");
+  if (format && Object.values(TIME_FORMAT).includes(format as TIME_FORMAT)) {
+    settings.is12hFormat = format === TIME_FORMAT.H12;
+    touched = true;
+  }
+
+  if (touched) {
+    ["theme", "lang", "unit", "format"].forEach((k) => params.delete(k));
+    window.history.replaceState(window.history.state, "", url.pathname + url.search + url.hash);
+  }
+}
diff --git a/tests/url-settings.spec.ts b/tests/url-settings.spec.ts
new file mode 100644
index 000000000..297d0fa90
--- /dev/null
+++ b/tests/url-settings.spec.ts
@@ -0,0 +1,37 @@
+import { test, expect } from "@playwright/test";
+import { start, stop, baseUrl } from "./evcc";
+
+test.use({ baseURL: baseUrl() });
+
+test.beforeAll(async () => {
+  await start();
+});
+test.afterAll(async () => {
+  await stop();
+});
+
+test.describe("ui settings via url", async () => {
+  test("apply, persist and strip valid params", async ({ page }) => {
+    await page.goto("/?theme=dark&lang=de&unit=mi&format=12");
+
+    await expect(page.locator("html")).toHaveAttribute("data-bs-theme", "dark");
+    await expect(page.locator("html")).toHaveAttribute("lang", "de");
+
+    const stored = await page.evaluate(() => ({
+      theme: localStorage["settings_theme"],
+      locale: localStorage["settings_locale"],
+      unit: localStorage["settings_unit"],
+      format: localStorage["settings_12h_format"],
+    }));
+    expect(stored).toEqual({ theme: "dark", locale: "de", unit: "mi", format: "true" });
+
+    // params removed from address bar
+    expect(new URL(page.url()).search).toBe("");
+  });
+
+  test("ignore invalid value and keep it in url", async ({ page }) => {
+    await page.goto("/?theme=bogus");
+    await expect(page.locator("html")).not.toHaveAttribute("data-bs-theme", "bogus");
+    expect(new URL(page.url()).searchParams.get("theme")).toBe("bogus");
+  });
+});