HTTP 304 Not Modified

What 304 means

Returned for conditional requests with If-None-Match (ETag) or If-Modified-Since. The browser reuses its cached version, saving bandwidth.

Common causes

• The browser revalidated a cached resource and it has not changed.

How to fix it

1. No fix needed; it is a caching success.
2. If users see stale content, review ETag and Cache-Control settings.

How to check a status code

Enter a URL in the HTTP Status Checker to see its status code, every redirect hop, and response time. For redirect-heavy pages, the Website Speed Test shows how much time redirects add.

FAQ

What does HTTP 304 mean?

304 Not Modified is a 3xx redirection status code. The cached copy is still valid, so the server sends no body.

What causes a 304 error?

The browser revalidated a cached resource and it has not changed.

How do I fix HTTP 304?

No fix needed; it is a caching success. If users see stale content, review ETag and Cache-Control settings.