diff --git a/apps/server/src/device/DeviceActions.test.ts b/apps/server/src/device/DeviceActions.test.ts
index 41e1de4304692..a388d4edf32db 100644
--- a/apps/server/src/device/DeviceActions.test.ts
+++ b/apps/server/src/device/DeviceActions.test.ts
@@ -1,4 +1,8 @@
+// @effect-diagnostics-next-line nodeBuiltinImport:off - Runs a real shell to reproduce adb joining arguments before Android executes them.
+import * as NodeChildProcess from "node:child_process";
+
 import { describe, expect, it } from "@effect/vitest";
+import * as HostProcess from "@t3tools/shared/HostProcess";
 import * as Effect from "effect/Effect";
 
 import { readDeviceDetail, runDeviceAction } from "./DeviceActions.ts";
@@ -43,6 +47,42 @@ const makeReady = (
 const udid = "SIM-1";
 
 describe("runDeviceAction", () => {
+  it.effect.each([
+    "https://example.com/callback?code=1&state=2",
+    "https://example.com/it's?a=1&b=2",
+    "https://example.com/a b?key=value",
+    "https://example.com/plain",
+  ])("opens the complete Android URL %s", (url) =>
+    Effect.gen(function* () {
+      if ((yield* HostProcess.Platform) === "win32") return;
+      const { ready, calls } = makeReady();
+      yield* runDeviceAction(ready, "android", {
+        type: "openUrl",
+        deviceId: "emulator-5554",
+        url,
+      });
+      const args = calls[0]!.args;
+      expect(args.slice(0, 3)).toEqual(["-s", "emulator-5554", "shell"]);
+      // adb joins its shell arguments without escaping before the device runs sh -c.
+      const result = NodeChildProcess.spawnSync(
+        "/bin/sh",
+        [
+          "-c",
+          `am() { printf '%s\\0' "$@"; }
+${args.slice(3).join(" ")}`,
+        ],
+        { encoding: "utf8" },
+      );
+      expect(result.status).toBe(0);
+      expect(result.stdout.split("\0").slice(0, -1)).toEqual([
+        "start",
+        "-a",
+        "android.intent.action.VIEW",
+        "-d",
+        url,
+      ]);
+    }),
+  );
   it.effect.each([
     ["emulator-5554", "Physical size: 2560x1600", "portrait", "-9.81:0:0"],
     ["emulator-5554", "Physical size: 2560x1600", "landscape_left", "0:9.81:0"],
diff --git a/apps/server/src/device/DeviceActions.ts b/apps/server/src/device/DeviceActions.ts
index 4ba532d7b2561..23776239d2cea 100644
--- a/apps/server/src/device/DeviceActions.ts
+++ b/apps/server/src/device/DeviceActions.ts
@@ -349,13 +349,21 @@ const serveSimPermissions = Effect.fn("DeviceActions.serveSimPermissions")(funct
 const adb = (run: Runner, serial: string, args: ReadonlyArray<string>, operation: string) =>
   run("adb", ["-s", serial, ...args]).pipe(Effect.flatMap(ok(operation)));
 
+// `adb shell` joins its arguments with spaces and hands the result to the device's `sh -c`
+// without escaping, so URLs and app ids must be quoted to arrive as single words.
+const androidShellWord = (value: string) =>
+  /^[\w@%+=:,./-]+$/.test(value) ? value : `'${value.replaceAll("'", "'\\''")}'`;
+
+const adbShell = (run: Runner, serial: string, args: ReadonlyArray<string>, operation: string) =>
+  adb(run, serial, ["shell", ...args.map(androidShellWord)], operation);
+
 const runAndroid = Effect.fn("DeviceActions.runAndroid")(function* (
   run: Runner,
   input: DeviceActionInput,
 ) {
   const serial = input.deviceId;
   const shell = (args: ReadonlyArray<string>, operation: string) =>
-    adb(run, serial, ["shell", ...args], operation);
+    adbShell(run, serial, args, operation);
   switch (input.type) {
     case "setAppearance":
       yield* shell(["cmd", "uimode", "night", input.value === "dark" ? "yes" : "no"], "appearance");
@@ -540,9 +548,7 @@ const isColorFilter = (value: unknown): value is DeviceSettings["colorFilter"] &
 
 const readAndroid = Effect.fn("DeviceActions.readAndroid")(function* (run: Runner, serial: string) {
   const shell = (args: ReadonlyArray<string>) =>
-    quiet(
-      adb(run, serial, ["shell", ...args], args[0] ?? "shell").pipe(Effect.map((s) => s.trim())),
-    );
+    quiet(adbShell(run, serial, args, args[0] ?? "shell").pipe(Effect.map((s) => s.trim())));
   const [night, fontScale, animator, wifi, focus] = yield* Effect.all(
     [
       shell(["cmd", "uimode", "night"]),