diff --git a/‎.changeset/loud-months-sell.md‎
Lines changed: 5 additions & 0 deletions b/‎.changeset/loud-months-sell.md‎
Lines changed: 5 additions & 0 deletions
diff --git a/‎packages/astro/src/core/routing/trailing-slash-handler.ts‎
Lines changed: 4 additions & 3 deletions b/‎packages/astro/src/core/routing/trailing-slash-handler.ts‎
Lines changed: 4 additions & 3 deletions
diff --git a/‎packages/astro/test/units/fetch/index.test.ts‎
Lines changed: 37 additions & 0 deletions b/‎packages/astro/test/units/fetch/index.test.ts‎
Lines changed: 37 additions & 0 deletions
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fixes trailing-slash redirect response body pointing to the incoming URL instead of the redirect target. The `location` header was correct, but the HTML body (`<meta http-equiv="refresh">`, `<title>`, and `<a>` tag) contained the original request path without the trailing-slash correction or query string.
@@ -30,17 +30,18 @@ export function handleTrailingSlash(state: FetchState): Response | undefined {
 
 	const addCookieHeader = state.renderOptions.addCookieHeader;
 	const status = state.request.method === 'GET' ? 301 : 308;
+	const location = redirect + url.search;
 	const response = new Response(
 		redirectTemplate({
 			status,
-			relativeLocation: url.pathname,
-			absoluteLocation: redirect,
+			relativeLocation: location,
+			absoluteLocation: location,
 			from: state.request.url,
 		}),
 		{
 			status,
 			headers: {
-				location: redirect + url.search,
+				location,
 			},
 		},
 	);
 
@@ -256,6 +256,43 @@ describe('trailingSlash()', () => {
 		assert.equal(result.status, 301);
 		assert.equal(result.headers.get('location'), '/about');
 	});
+
+	it('includes the redirect target (not the incoming path) in the response body', async () => {
+		const app = createTestApp([createPage(simplePage, { route: '/' })], {
+			trailingSlash: 'always',
+		});
+		const request = stampApp(new Request('http://example.com/about'), app);
+		const state = new FetchState(request);
+
+		const result = trailingSlash(state);
+		assert.ok(result instanceof Response);
+		const body = await result.text();
+		assert.ok(
+			body.includes('/about/'),
+			'body should contain the redirect target with trailing slash',
+		);
+		assert.ok(
+			!body.includes('url=/about"'),
+			'meta refresh should not point to the incoming path without trailing slash',
+		);
+	});
+
+	it('preserves query string in the redirect response body', async () => {
+		const app = createTestApp([createPage(simplePage, { route: '/' })], {
+			trailingSlash: 'always',
+		});
+		const request = stampApp(new Request('http://example.com/about?ref=nav'), app);
+		const state = new FetchState(request);
+
+		const result = trailingSlash(state);
+		assert.ok(result instanceof Response);
+		assert.equal(result.headers.get('location'), '/about/?ref=nav');
+		const body = await result.text();
+		assert.ok(
+			body.includes('/about/?ref=nav'),
+			'body should include the full redirect target with query string',
+		);
+	});
 });
 
 // #endregion
-Original file line number
+Diff line change
@@ @@ -0,0 +1,5 @@ @@
 +---
 +'astro': patch
 +---
++
 +Fixes trailing-slash redirect response body pointing to the incoming URL instead of the redirect target. The `location` header was correct, but the HTML body (`<meta http-equiv="refresh">`, `<title>`, and `<a>` tag) contained the original request path without the trailing-slash correction or query string.