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Technical SEO

What Is Duplicate Content?

Duplicate content is substantively similar or identical content that appears on multiple URLs, either within the same website (internal duplicates) or across different websites (external duplicates). Search engines must decide which version to index and rank.

Why Duplicate Content matters for SEO

Duplicate content splits ranking signals between multiple URLs, causing keyword cannibalization. Google won't penalize you for duplicate content, but it will choose which version to index, and it may not choose the one you prefer. Common causes: parameter URLs, trailing slash variations, HTTP/HTTPS versions, and print-friendly pages.

Pro tip on Duplicate Content

Use canonical tags to point all duplicate versions to the preferred URL. Implement 301 redirects for permanent URL consolidation. Use parameter handling in Google Search Console. For ecommerce, canonicalize product variant pages to the main product URL.

Related terms

Canonical TagCanonical tags are the primary solution for duplicate contentNoindexNoindex removes duplicate pages from the index entirely

Check duplicate content on your site

Bulk Title Tag CheckerCheck up to 100 title tags at once, measured in pixels rather than characters, and find the duplicates across a set that no single-URL checker can see.URL Slug GeneratorTurn a list of page titles into clean, readable URL slugs. Accents transliterated, filler words optional, and duplicates caught across the whole list.Hreflang ValidatorValidate hreflang tags for international SEO: self-referencing, return tags, x-default, language codes, and duplicate detection.

Duplicate content silently splits your ranking signals. CrawlRaven identifies every duplicate across your site and recommends whether to canonicalize, redirect, or noindex.

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