diff --git a/src/utils/__snapshots__/helpers.spec.ts.snap b/src/utils/__snapshots__/helpers.spec.ts.snap
new file mode 100644
index 0000000..78715ac
--- /dev/null
+++ b/src/utils/__snapshots__/helpers.spec.ts.snap
@@ -0,0 +1,24 @@
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+
+exports[`helpers > parseCookieHeader > should parse a Cookie header 1`] = `[]`;
+
+exports[`helpers > parseCookieHeader > should parse a Cookie header 2`] = `
+[
+  {
+    "name": "a",
+    "value": "b",
+  },
+  {
+    "name": "c",
+    "value": " hello ",
+  },
+  {
+    "name": "e",
+    "value": "f",
+  },
+]
+`;
+
+exports[`helpers > serializeCookieHeader > should serialize a cookie to a Set-Cookie header 1`] = `"a=; Max-Age=123; Path=/; HttpOnly; Secure"`;
+
+exports[`helpers > serializeCookieHeader > should serialize a cookie to a Set-Cookie header 2`] = `"b=%20weird%20value; Max-Age=345"`;
diff --git a/src/utils/helpers.spec.ts b/src/utils/helpers.spec.ts
new file mode 100644
index 0000000..6365928
--- /dev/null
+++ b/src/utils/helpers.spec.ts
@@ -0,0 +1,36 @@
+import { describe, it, expect } from "vitest";
+
+import {
+  serialize,
+  parse,
+  // intentionally importing ^ to make sure they're exported, remove in v1.0.0
+  parseCookieHeader,
+  serializeCookieHeader,
+} from "./helpers";
+
+describe("helpers", () => {
+  describe("parseCookieHeader", () => {
+    it("should parse a Cookie header", () => {
+      expect(parseCookieHeader("")).toMatchSnapshot();
+      expect(
+        parseCookieHeader(`a=b;c=${encodeURIComponent(" hello ")};e=f`),
+      ).toMatchSnapshot();
+    });
+  });
+
+  describe("serializeCookieHeader", () => {
+    it("should serialize a cookie to a Set-Cookie header", () => {
+      expect(
+        serializeCookieHeader("a", "", {
+          path: "/",
+          maxAge: 123,
+          httpOnly: true,
+          secure: true,
+        }),
+      ).toMatchSnapshot();
+      expect(
+        serializeCookieHeader("b", " weird value", { maxAge: 345 }),
+      ).toMatchSnapshot();
+    });
+  });
+});
diff --git a/src/utils/helpers.ts b/src/utils/helpers.ts
index fef3027..cce85c6 100644
--- a/src/utils/helpers.ts
+++ b/src/utils/helpers.ts
@@ -1,4 +1,50 @@
-export { parse, serialize } from "cookie";
+import type { CookieSerializeOptions } from "cookie";
+import { parse as cookieParse, serialize as cookieSerialize } from "cookie";
+
+/**
+ * @deprecated Since v0.4.0: Please use {@link parseCookieHeader}. `parse` will
+ * not be available for import starting v1.0.0 of `@supabase/ssr`.
+ */
+export const parse = cookieParse;
+
+/**
+ * @deprecated Since v0.4.0: Please use {@link serializeCookieHeader}.
+ * `serialize` will not be available for import starting v1.0.0 of
+ * `@supabase/ssr`.
+ */
+export const serialize = cookieSerialize;
+
+/**
+ * Parses the `Cookie` HTTP header into an array of cookie name-value objects.
+ *
+ * @param header The `Cookie` HTTP header. Decodes cookie names and values from
+ * URI encoding first.
+ */
+export function parseCookieHeader(
+  header: string,
+): { name: string; value: string }[] {
+  const parsed = cookieParse(header);
+
+  return Object.keys(parsed ?? {}).map((name) => ({
+    name,
+    value: parsed[name],
+  }));
+}
+
+/**
+ * Converts the arguments to a valid `Set-Cookie` header. Non US-ASCII chars
+ * and other forbidden cookie chars will be URI encoded.
+ *
+ * @param name Name of cookie.
+ * @param value Value of cookie.
+ */
+export function serializeCookieHeader(
+  name: string,
+  value: string,
+  options: CookieSerializeOptions,
+): string {
+  return cookieSerialize(name, value, options);
+}
 
 export function isBrowser() {
   return (