diff --git a/package.json b/package.json
index 18e2a8b0a2..2b5d1b81b9 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,9 @@
 {
   "type": "module",
   "scripts": {
-    "test": "npx ava tests/*.test.js"
+    "test": "npx ava tests/*.test.js",
+    "check:reserved-order": "node util/check-reserved-order.cjs",
+    "add:reserved": "node util/add-reserved-subdomain.cjs"
   },
   "devDependencies": {
     "ava": "^8.0.1",
diff --git a/util/add-reserved-subdomain.cjs b/util/add-reserved-subdomain.cjs
new file mode 100644
index 0000000000..500759cd3b
--- /dev/null
+++ b/util/add-reserved-subdomain.cjs
@@ -0,0 +1,57 @@
+const { readFileSync, writeFileSync } = require("node:fs");
+const { join } = require("node:path");
+const readline = require("node:readline");
+
+const filePath = join(__dirname, "reserved.json");
+const prompt = "What subdomain would you want to add to the reserved.json list: ";
+
+const interface = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout,
+});
+
+interface.question(prompt, (input) => {
+  const subdomain = input.trim();
+
+  if (!subdomain) {
+    console.error("Subdomain cannot be empty.");
+    interface.close();
+    process.exitCode = 1;
+    return;
+  }
+
+  if (subdomain !== subdomain.toLowerCase() || /\s/.test(subdomain)) {
+    console.error("Subdomain must be lowercase and cannot contain whitespace.");
+    interface.close();
+    process.exitCode = 1;
+    return;
+  }
+
+  const fileContents = readFileSync(filePath, "utf8");
+  const reserved = JSON.parse(fileContents);
+
+  if (reserved.includes(subdomain)) {
+    console.error(`"${subdomain}" is already in reserved.json.`);
+    interface.close();
+    process.exitCode = 1;
+    return;
+  }
+
+  const insertionIndex = reserved.findIndex(
+    (entry) => entry > subdomain,
+  );
+  const index = insertionIndex === -1 ? reserved.length : insertionIndex;
+  reserved.splice(index, 0, subdomain);
+
+  const newline = fileContents.includes("\r\n") ? "\r\n" : "\n";
+  const output = `${JSON.stringify(reserved, null, 4)}${newline}`;
+  writeFileSync(filePath, output);
+
+  const lineNumber = index + 2;
+  const precedingEntry = index > 0 ? reserved[index - 1] : "[";
+  const followingEntry = index < reserved.length - 1 ? reserved[index + 1] : "]";
+  console.log(
+    `Added "${subdomain}" on line ${lineNumber}, after "${precedingEntry}" and before "${followingEntry}".`,
+  );
+  interface.close();
+});
\ No newline at end of file
diff --git a/util/check-reserved-order.cjs b/util/check-reserved-order.cjs
new file mode 100644
index 0000000000..5456ee6c05
--- /dev/null
+++ b/util/check-reserved-order.cjs
@@ -0,0 +1,31 @@
+const { readFileSync } = require("node:fs");
+const { join } = require("node:path");
+
+const filePath = join(__dirname, "reserved.json");
+const fileContents = readFileSync(filePath, "utf8");
+const reserved = JSON.parse(fileContents);
+
+for (let index = 1; index < reserved.length; index += 1) {
+  if (reserved[index - 1] > reserved[index]) {
+    let precedingIndex = index - 1;
+
+    while (
+      precedingIndex >= 0 &&
+      reserved[precedingIndex] > reserved[index]
+    ) {
+      precedingIndex -= 1;
+    }
+
+    const precedingLine = precedingIndex + 2;
+
+    console.error(
+      `reserved.json is not in alphabetical order: line ${index + 2} ("${reserved[index]}") should go after line ${precedingLine} ("${precedingIndex >= 0 ? reserved[precedingIndex] : "["}") and before line ${index + 1} ("${reserved[index - 1]}").`,
+    );
+    process.exitCode = 1;
+    break;
+  }
+}
+
+if (process.exitCode !== 1) {
+  console.log("reserved.json is in alphabetical order.");
+}
\ No newline at end of file