diff --git a/path/normalize.ts b/path/normalize.ts
index d31f24195..c069a16dc 100644
--- a/path/normalize.ts
+++ b/path/normalize.ts
@@ -26,6 +26,34 @@ import { normalize as windowsNormalize } from "./windows/normalize.ts";
  * @param path Path to be normalized
  * @returns The normalized path.
  */
-export function normalize(path: string): string {
+export function normalize(path: string): string;
+/**
+ * Normalize the path, resolving `'..'` and `'.'` segments.
+ *
+ * @experimental **UNSTABLE**: New API, yet to be vetted.
+ *
+ * Note: Resolving these segments does not necessarily mean that all will be
+ * eliminated. A `'..'` at the top-level will be preserved, and an empty path is
+ * canonically `'.'`.
+ *
+ * @example Usage
+ * ```ts
+ * import { normalize } from "@std/path/normalize";
+ * import { assertEquals } from "@std/assert";
+ *
+ * if (Deno.build.os === "windows") {
+ *   assertEquals(normalize("C:\\foo\\bar\\..\\baz\\quux"), "C:\\foo\\baz\\quux");
+ *   assertEquals(normalize(new URL("file:///C:/foo/bar/../baz/quux")), "C:\\foo\\baz\\quux");
+ * } else {
+ *   assertEquals(normalize("/foo/bar/../baz/quux"), "/foo/baz/quux");
+ *   assertEquals(normalize(new URL("file:///foo/bar/../baz/quux")), "/foo/baz/quux");
+ * }
+ * ```
+ *
+ * @param path Path to be normalized. Path can be a string or a file URL object.
+ * @returns The normalized path.
+ */
+export function normalize(path: string | URL): string;
+export function normalize(path: string | URL): string {
   return isWindows ? windowsNormalize(path) : posixNormalize(path);
 }
diff --git a/path/normalize_test.ts b/path/normalize_test.ts
index 19eec85b0..0107b2877 100644
--- a/path/normalize_test.ts
+++ b/path/normalize_test.ts
@@ -8,9 +8,24 @@ Deno.test(`normalize() returns "." if input is empty`, function () {
   assertEquals(windows.normalize(""), ".");
 });
 
+Deno.test("posix.normalize() normalizes posix specific paths", () => {
+  assertEquals(
+    posix.normalize("/foo/bar//baz/asdf/quux/.."),
+    "/foo/bar/baz/asdf",
+  );
+  assertEquals(
+    posix.normalize(new URL("file:///foo/bar//baz/asdf/quux/..")),
+    "/foo/bar/baz/asdf/",
+  );
+});
+
 Deno.test("windows.normalize() normalizes windows specific paths", () => {
   assertEquals(
     windows.normalize("//server/share/dir/file.ext"),
     "\\\\server\\share\\dir\\file.ext",
   );
+  assertEquals(
+    windows.normalize(new URL("file:///C:/foo/bar/../baz/quux")),
+    "C:\\foo\\baz\\quux",
+  );
 });
diff --git a/path/posix/normalize.ts b/path/posix/normalize.ts
index 91bc0e6fa..c27d5e663 100644
--- a/path/posix/normalize.ts
+++ b/path/posix/normalize.ts
@@ -4,6 +4,7 @@
 import { assertArg } from "../_common/normalize.ts";
 import { normalizeString } from "../_common/normalize_string.ts";
 import { isPosixPathSeparator } from "./_util.ts";
+import { fromFileUrl } from "./from_file_url.ts";
 
 /**
  * Normalize the `path`, resolving `'..'` and `'.'` segments.
@@ -19,28 +20,32 @@ import { isPosixPathSeparator } from "./_util.ts";
  * assertEquals(path, "/foo/bar/baz/asdf");
  * ```
  *
- * @example Working with URLs
+ * @param path The path to normalize.
+ * @returns The normalized path.
+ */
+export function normalize(path: string): string;
+/**
+ * Normalize the `path`, resolving `'..'` and `'.'` segments.
+ * Note that resolving these segments does not necessarily mean that all will be eliminated.
+ * A `'..'` at the top-level will be preserved, and an empty path is canonically `'.'`.
  *
- * Note: This function will remove the double slashes from a URL's scheme.
- * Hence, do not pass a full URL to this function. Instead, pass the pathname of
- * the URL.
+ * @experimental **UNSTABLE**: New API, yet to be vetted.
  *
+ * @example Usage
  * ```ts
  * import { normalize } from "@std/path/posix/normalize";
  * import { assertEquals } from "@std/assert";
  *
- * const url = new URL("https://deno.land");
- * url.pathname = normalize("//std//assert//.//mod.ts");
- * assertEquals(url.href, "https://deno.land/std/assert/mod.ts");
- *
- * url.pathname = normalize("std/assert/../async/retry.ts");
- * assertEquals(url.href, "https://deno.land/std/async/retry.ts");
+ * assertEquals(normalize("/foo/bar//baz/asdf/quux/.."), "/foo/bar/baz/asdf");
+ * assertEquals(normalize(new URL("file:///foo/bar//baz/asdf/quux/..")), "/foo/bar/baz/asdf/");
  * ```
  *
- * @param path The path to normalize.
+ * @param path The path to normalize. Path can be a string or a file URL object.
  * @returns The normalized path.
  */
-export function normalize(path: string): string {
+export function normalize(path: string | URL): string;
+export function normalize(path: string | URL): string {
+  path = path instanceof URL ? fromFileUrl(path) : path;
   assertArg(path);
 
   const isAbsolute = isPosixPathSeparator(path.charCodeAt(0));
diff --git a/path/windows/normalize.ts b/path/windows/normalize.ts
index ddecd10fa..29bdd0c83 100644
--- a/path/windows/normalize.ts
+++ b/path/windows/normalize.ts
@@ -5,6 +5,7 @@ import { assertArg } from "../_common/normalize.ts";
 import { CHAR_COLON } from "../_common/constants.ts";
 import { normalizeString } from "../_common/normalize_string.ts";
 import { isPathSeparator, isWindowsDeviceRoot } from "./_util.ts";
+import { fromFileUrl } from "./from_file_url.ts";
 
 /**
  * Normalize the `path`, resolving `'..'` and `'.'` segments.
@@ -23,7 +24,29 @@ import { isPathSeparator, isWindowsDeviceRoot } from "./_util.ts";
  * @param path The path to normalize
  * @returns The normalized path
  */
-export function normalize(path: string): string {
+export function normalize(path: string): string;
+/**
+ * Normalize the `path`, resolving `'..'` and `'.'` segments.
+ * Note that resolving these segments does not necessarily mean that all will be eliminated.
+ * A `'..'` at the top-level will be preserved, and an empty path is canonically `'.'`.
+ *
+ * @experimental **UNSTABLE**: New API, yet to be vetted.
+ *
+ * @example Usage
+ * ```ts
+ * import { normalize } from "@std/path/windows/normalize";
+ * import { assertEquals } from "@std/assert";
+ *
+ * assertEquals(normalize("C:\\foo\\..\\bar"), "C:\\bar");
+ * assertEquals(normalize(new URL("file:///C:/foo/../bar")), "C:\\bar");
+ * ```
+ *
+ * @param path The path to normalize. Path can be a string or a file URL object.
+ * @returns The normalized path
+ */
+export function normalize(path: string | URL): string;
+export function normalize(path: string | URL): string {
+  path = path instanceof URL ? fromFileUrl(path) : path;
   assertArg(path);
 
   const len = path.length;