Double slash in URL: fix the duplicate-content risk

What it means

A double slash in a URL path (e.g., https://example.com//products//shoes) means two consecutive / characters appear where one is expected. This creates a URL that technically differs from the single-slash version, even though browsers and most servers treat them as the same resource.

Why it matters

Google treats //path as a distinct URL from /path, so the same content can appear at two URLs in the index. This wastes crawl budget on duplicate pages and can split ranking signals. For AI Overviews and AI Mode, the double-slash variant may not be recognized as the canonical answer, reducing visibility in AI-generated responses.

How to fix it

1. Redirect the double-slash variant to the single-slash version using a 301 redirect.
2. Set a canonical tag pointing from the double-slash URL to the single-slash version: <link rel="canonical" href="https://example.com/products/shoes">
3. Audit your routing layer (Next.js, Astro, or server config) to ensure URLs are normalized on generation and on incoming requests.

Example

https://example.com/blog//post-title

https://example.com/blog/post-title

A double slash usually comes from a base path and a leading-slash link concatenated. It can serve a duplicate of the clean URL — normalize it and 301.

When it's not a problem

If your server or CDN normalizes double slashes transparently before any response is sent, and the single-slash URL is the one that appears in your sitemap and canonical tags, the double-slash variant may simply be a harmless alias. Also check whether the double slash is intentional — some frameworks use it for path segments or routing patterns.

How Crawlinx detects it

We scan the URL path for a // sequence. Empty path segments (a double slash) trip this — commonly a templating bug joining a trailing-slash base with a leading-slash path.

How common is it?

128 audited sites in our corpus currently show this issue. The breakdowns below show which platforms, gatekeepers, verticals and countries are most exposed.