Duplicate Content Checker

Find duplicate and copied content so your rankings keep their momentum. Paste text or a URL and this free tool checks for internal duplication across your pages and copied passages elsewhere on the web, so you can rewrite, canonicalize, or consolidate.

How to use the Duplicate Content Checker

1. Paste your text or enter a URL.
2. Run the duplicate scan.
3. Review matched passages and their sources.
4. Rewrite, canonicalize, or noindex as needed.

How unique content strengthens SEO

When the same content exists on multiple URLs, Google has to choose one to rank and consolidating instead keeps all the signals on one URL and your crawl budget focused. Spotting duplication early lets you set canonicals, consolidate pages, or make each page genuinely unique.

How the similarity score works

The tool breaks both texts into overlapping four-word phrases and measures how many they share. That catches real duplication, including reordered paragraphs, where a naive word-frequency comparison would not. Above 60% the pages are effectively the same document; between 30% and 60% you have substantial overlap worth rewriting.

Consolidating duplication concentrates your signals

Google does not penalise duplicate content in most cases; it picks one version and ignores the rest. The damage is indirect: your links and internal signals split across near-identical URLs, and neither version ranks as well as one consolidated page would.

Merge, canonicalise or rewrite?

• Merge with a 301 when both pages target the same intent and one is clearly stronger.
• Canonical when both URLs must stay live, parameters, print views, syndicated copies.
• Rewrite when the intents genuinely differ and the overlap is lazy boilerplate.

The usual culprits

Location pages built from one template, service pages that repeat the same intro, and category pages paginated without proper handling. Generate the consolidation rules with the redirect map generator once you have decided.

Key features

• Internal & external duplication checks
• Passage-level matching
• Source URLs
• Similarity score
• Free

Frequently asked questions

How does duplicate content affect rankings?

It spreads signals across several URLs, so consolidating with a canonical or a redirect puts all of that strength back on one page.

How do I fix duplicate content?

Use canonical tags, 301 redirects, rewrites, or noindex.

What about boilerplate text?

Small repeated elements are fine; large duplicated bodies are the problem.

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Keyword Density Checker · Word Counter · Bulk Title & Description Checker. See all of our free SEO tools.

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