diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..50daeaa
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,16 @@
+/**
+Compare URLs by first normalizing them.
+
+@param firstUrl - The first URL to compare.
+@param secondUrl - The second URL to compare.
+@returns A boolean indicating whether the URLs are the same.
+
+@example
+```
+import compareUrls from 'compare-urls';
+
+compareUrls('HTTPS://sindresorhus.com/?b=b&a=a', 'sindresorhus.com/?a=a&b=b');
+//=> true
+```
+*/
+export default function compareUrls(firstUrl: string, secondUrl: string): boolean;
diff --git a/package.json b/package.json
index 440b73d..a188297 100644
--- a/package.json
+++ b/package.json
@@ -12,6 +12,7 @@
 	},
 	"type": "module",
 	"exports": "./index.js",
+	"types": "./index.d.ts",
 	"engines": {
 		"node": ">=18"
 	},
@@ -19,7 +20,8 @@
 		"test": "xo && ava"
 	},
 	"files": [
-		"index.js"
+		"index.js",
+		"index.d.ts"
 	],
 	"keywords": [
 		"compare",