Redirected Page Resource URLs: How to Fix Them

What this check flags

This audit flags page resources, meaning the CSS files, JavaScript files, images, and web fonts that a page loads in order to render, where the referenced URL does not respond with a direct 200 but instead returns a 301 or 302 redirect to a different URL. The page itself may be perfectly healthy. The problem sits one level down: the building blocks of the page are being requested at an old address and bounced to a new one.

It is the resource equivalent of an internal redirect. Just as an internal link pointing at a redirecting page wastes a hop, a stylesheet or script loaded through a redirecting URL wastes a hop on every single page view. Crawlers like Sitebulb and SEO ProCheck surface this because the cost is invisible in the HTML source. The markup looks fine; only the network layer reveals the detour.

Why it matters

Every redirect adds a full request round-trip before the browser can even start downloading the real file. For a render-blocking resource such as a stylesheet or a synchronous script in the head, that delay sits directly on the critical rendering path. The browser cannot paint anything until the CSS arrives, so a redirect on that CSS pushes back first paint and, by extension, Largest Contentful Paint. Google's Lighthouse documentation is explicit on this point: redirects introduce additional delays and are especially harmful on resources required for the critical rendering path.

There is a crawl and indexing angle too. Googlebot renders pages, which means it fetches your resources the same way a browser does. Redirected resources burn extra fetches from your crawl budget, and if a redirect chain breaks or times out, Google may render the page without that resource entirely. A page rendered without its CSS or a key script can be evaluated very differently from the page your visitors see. On mobile connections with higher latency, the user-facing cost of each redirect hop is even larger.

Where it comes from

A few patterns cause the vast majority of these flags:

HTTP to HTTPS references. The site migrated to HTTPS years ago, but templates, old posts, or hardcoded theme files still reference assets with http:// URLs. The server-level redirect quietly fixes each request, at the cost of a hop per asset per page view.

CDN swaps and domain changes. Assets moved from cdn1.example.com to cdn2.example.com, or from a subdomain to the root domain, and the old hostnames now redirect instead of being updated in the markup.

Hardcoded old asset paths. A restructure renamed /assets/ to /static/, or a versioned file like style-v1.css now redirects to style-v2.css, and references scattered across templates and inline styles were never updated.

Plugin and theme updates. On WordPress in particular, a plugin update can relocate its bundled scripts, while a caching layer, a minification plugin, or a child theme keeps serving references to the old location. Trailing-slash and www canonicalization rules can also silently redirect every asset request.

How to diagnose it

Start with your crawler's resource report. Sitebulb lists every flagged resource URL together with the pages that reference it, which tells you both what redirects and where the stale reference lives. Sort by the number of referencing pages so you fix the highest-impact resources first; a redirecting sitewide stylesheet matters far more than one image on one old post.

To confirm any single case, open Chrome DevTools, switch to the Network tab, and reload the page with cache disabled. Redirected resources show a 301 or 302 status row immediately followed by the request to the final URL. The Initiator column tells you which file or template generated the request, which is exactly where the fix belongs. You can also verify from the command line:

curl -sI http://example.com/assets/main.css | head -3

HTTP/1.1 301 Moved Permanently
Location: https://example.com/static/main.css

How to fix it

The fix is conceptually simple: stop referencing the old URL and reference the final destination directly. Follow each redirect to its end point, confirm that destination returns 200, then update every src and href that points at the old address. The places to look are your page templates, theme files, inline style blocks, and the CSS files themselves, since url() references inside stylesheets redirect just as expensively as anything in the HTML.

<!-- Bad: both references redirect before loading -->
<link rel="stylesheet" href="http://example.com/assets/main.css">
<script src="https://cdn1.example.com/js/app.js"></script>

<!-- Good: direct 200 responses, no extra hop -->
<link rel="stylesheet" href="https://example.com/static/main.css">
<script src="https://cdn2.example.com/js/app.js"></script>

On a CMS, fix the template once rather than editing rendered pages one by one. For references buried in old post content, a careful search-and-replace across the database handles the bulk. Keep the redirects themselves in place after updating the references; they still protect any external sites or cached pages that link to the old asset URLs.

Common mistakes

The most common mistake is deleting the redirect instead of updating the reference, which turns a slow asset into a broken one. Another is updating the HTML but forgetting url() references inside CSS files, so fonts and background images keep redirecting. Watch out for fixing only one hop of a chain, leaving a redirect that now points at another redirect. Finally, do not assume a caching plugin will mask the problem: first-time visitors, and every crawler render, still pay the full penalty.

FAQ