Keyword Cannibalisation Checker

Keyword cannibalisation happens when multiple pages on the same site target the same or closely overlapping search queries. Rather than one strong page ranking well, you end up with several pages competing against each other — splitting authority, confusing search engines about which page to rank, and typically leaving all of them underperforming.

It is one of the most common structural SEO problems, and one of the easiest to miss because each individual page looks fine in isolation. The problem only becomes visible when you map keywords across the full site. This tool does that analysis for you.

Enter one page per line: URL + primary keyword (+ optional secondary keywords). Use tab, | or ; as separator.

Pages and keywords

Secondary keywords are optional. If included, separate them with commas after the second separator.

Understanding your results

Exact conflicts

These are the most urgent finding. Two or more pages are targeting keywords with high token overlap — meaning Google sees them as competing for the same queries. In most cases, one page is significantly stronger than the other (more links, more content, longer established). The correct fix is usually to consolidate: redirect the weaker page to the stronger one, and merge any unique content worth keeping. Alternatively, if both pages serve a distinct audience or intent, differentiate their content and keyword targets clearly enough that Google can tell them apart.

Close overlaps

These are pages with meaningful keyword similarity but not an identical target. This may or may not be a problem depending on the content. If both pages genuinely cover different aspects of a topic and serve different intents, the overlap in secondary keywords may be acceptable. If the content is substantially similar, or if one page is clearly a subset of the other, consolidation or keyword differentiation is the right approach.

How to fix cannibalisation

There are three approaches, and the right one depends on the specific pages involved:

Consolidate

Merge the weaker page into the stronger one with a 301 redirect. This concentrates all signals — links, content, authority — onto a single URL and is usually the most impactful fix. Use this when both pages cover essentially the same topic and one is clearly stronger.

Differentiate

If both pages serve a legitimate and distinct purpose, rewrite them to target clearly different queries. Ensure their primary keywords have no significant overlap, their content angles are distinct, and their search intent is different. A commercial service page and an informational guide can cover related topics without cannibalising if the intent gap is clear.

Canonical

If one page is a variant or near-duplicate of another and needs to remain accessible, add a canonical tag on the weaker page pointing to the preferred version. This tells search engines which URL to index and rank. Use this as a last resort — consolidation is preferable where possible.

Why cannibalisation is easy to miss

Most cannibalisation problems develop gradually. A site adds pages over time without a structured keyword map, different team members create content targeting similar topics, or a site migration brings over legacy pages with overlapping focus areas. The result is a keyword architecture that was never designed to avoid conflicts — it just accumulated them.

Running this tool against your full page list periodically — particularly after adding new content — is a practical way to catch conflicts before they compound. For a full keyword architecture review as part of a broader SEO strategy engagement, get in touch.

Related resources

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