diff --git a/packages/gitbook-v2/src/lib/data/index.ts b/packages/gitbook-v2/src/lib/data/index.ts
index d79049684a..2e37e2fbb4 100644
--- a/packages/gitbook-v2/src/lib/data/index.ts
+++ b/packages/gitbook-v2/src/lib/data/index.ts
@@ -4,5 +4,4 @@ export * from './pages';
 export * from './urls';
 export * from './errors';
 export * from './lookup';
-export * from './proxy';
 export * from './visitor';
diff --git a/packages/gitbook-v2/src/lib/data/visitor.ts b/packages/gitbook-v2/src/lib/data/visitor.ts
index f93f0afe87..e59e32365c 100644
--- a/packages/gitbook-v2/src/lib/data/visitor.ts
+++ b/packages/gitbook-v2/src/lib/data/visitor.ts
@@ -1,6 +1,6 @@
 import { withLeadingSlash, withTrailingSlash } from '@/lib/paths';
 import type { PublishedSiteContent } from '@gitbook/api';
-import { getProxyRequestIdentifier, isProxyRequest } from './proxy';
+import { getProxyRequestIdentifier, isProxyRequest } from '@v2/lib/proxy';
 
 /**
  * Get the appropriate base path for the visitor authentication cookie.
diff --git a/packages/gitbook-v2/src/lib/images/getImageResizingContextId.test.ts b/packages/gitbook-v2/src/lib/images/getImageResizingContextId.test.ts
new file mode 100644
index 0000000000..eaba01663b
--- /dev/null
+++ b/packages/gitbook-v2/src/lib/images/getImageResizingContextId.test.ts
@@ -0,0 +1,19 @@
+import { describe, expect, it } from 'bun:test';
+import { getImageResizingContextId } from './getImageResizingContextId';
+
+describe('getImageResizingContextId', () => {
+    it('should return proxy identifier for proxy requests', () => {
+        const proxyRequestURL = new URL('https://proxy.gitbook.site/sites/site_foo/hello/world');
+        expect(getImageResizingContextId(proxyRequestURL)).toBe('sites/site_foo');
+    });
+
+    it('should return preview identifier for preview requests', () => {
+        const previewRequestURL = new URL('https://preview/site_foo/hello/world');
+        expect(getImageResizingContextId(previewRequestURL)).toBe('site_foo');
+    });
+
+    it('should return host for regular requests', () => {
+        const regularRequestURL = new URL('https://example.com/docs/foo/hello/world');
+        expect(getImageResizingContextId(regularRequestURL)).toBe('example.com');
+    });
+});
diff --git a/packages/gitbook-v2/src/lib/images/getImageResizingContextId.ts b/packages/gitbook-v2/src/lib/images/getImageResizingContextId.ts
index 82f9225262..40594e2ae2 100644
--- a/packages/gitbook-v2/src/lib/images/getImageResizingContextId.ts
+++ b/packages/gitbook-v2/src/lib/images/getImageResizingContextId.ts
@@ -1,4 +1,5 @@
-import { getProxyRequestIdentifier, isProxyRequest } from '../data';
+import { getPreviewRequestIdentifier, isPreviewRequest } from '@v2/lib/preview';
+import { getProxyRequestIdentifier, isProxyRequest } from '@v2/lib/proxy';
 
 /**
  * Get the site identifier to use for image resizing for an incoming request.
@@ -8,6 +9,9 @@ export function getImageResizingContextId(url: URL): string {
     if (isProxyRequest(url)) {
         return getProxyRequestIdentifier(url);
     }
+    if (isPreviewRequest(url)) {
+        return getPreviewRequestIdentifier(url);
+    }
 
     return url.host;
 }
diff --git a/packages/gitbook-v2/src/lib/preview.test.ts b/packages/gitbook-v2/src/lib/preview.test.ts
new file mode 100644
index 0000000000..bbaf0402bd
--- /dev/null
+++ b/packages/gitbook-v2/src/lib/preview.test.ts
@@ -0,0 +1,21 @@
+import { describe, expect, it } from 'bun:test';
+import { getPreviewRequestIdentifier, isPreviewRequest } from './preview';
+
+describe('isPreviewRequest', () => {
+    it('should return true for preview requests', () => {
+        const previewRequestURL = new URL('https://preview/site_foo/hello/world');
+        expect(isPreviewRequest(previewRequestURL)).toBe(true);
+    });
+
+    it('should return false for non-preview requests', () => {
+        const nonPreviewRequestURL = new URL('https://example.com/docs/foo/hello/world');
+        expect(isPreviewRequest(nonPreviewRequestURL)).toBe(false);
+    });
+});
+
+describe('getPreviewRequestIdentifier', () => {
+    it('should return the correct identifier for preview requests', () => {
+        const previewRequestURL = new URL('https://preview/site_foo/hello/world');
+        expect(getPreviewRequestIdentifier(previewRequestURL)).toBe('site_foo');
+    });
+});
diff --git a/packages/gitbook-v2/src/lib/preview.ts b/packages/gitbook-v2/src/lib/preview.ts
new file mode 100644
index 0000000000..7094d11970
--- /dev/null
+++ b/packages/gitbook-v2/src/lib/preview.ts
@@ -0,0 +1,13 @@
+/**
+ * Check if the request to the site is a preview request.
+ */
+export function isPreviewRequest(requestURL: URL): boolean {
+    return requestURL.host === 'preview';
+}
+
+export function getPreviewRequestIdentifier(requestURL: URL): string {
+    // For preview requests, we extract the site ID from the pathname
+    // e.g. https://preview/site_id/...
+    const pathname = requestURL.pathname.slice(1).split('/');
+    return pathname[0];
+}
diff --git a/packages/gitbook-v2/src/lib/data/proxy.test.ts b/packages/gitbook-v2/src/lib/proxy.test.ts
similarity index 100%
rename from packages/gitbook-v2/src/lib/data/proxy.test.ts
rename to packages/gitbook-v2/src/lib/proxy.test.ts
diff --git a/packages/gitbook-v2/src/lib/data/proxy.ts b/packages/gitbook-v2/src/lib/proxy.ts
similarity index 100%
rename from packages/gitbook-v2/src/lib/data/proxy.ts
rename to packages/gitbook-v2/src/lib/proxy.ts