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SEO tool

Duplicate Content Finder

Compare pasted page text to find exact repeated phrases and measure word-set similarity.

Find repeated text across pages

Compare pasted page text, identify exact duplicate blocks and measure similarity without uploading your content.

Use the marker --- PAGE BREAK --- to compare multiple pages. For best results, paste main content rather than navigation, footer or cookie text.

What this duplicate content finder measures

The tool compares the unique word sets of each pasted page pair using Jaccard similarity, then looks for exact repeated phrases across pages. It is a local content-review aid, not a search-engine duplication detector.

How to use it

  1. Paste each page's main text into its own section.
  2. Separate pages with --- PAGE BREAK ---.
  3. Choose the minimum phrase length and run the analysis.
  4. Review high-overlap page pairs and repeated phrases before deciding whether pages need rewriting, consolidation, or a canonical strategy.

Why similarity is only a signal

Search engines can cluster substantially similar URLs and choose a canonical based on several signals. Similarity in this tool does not reproduce that process and should not be treated as a pass/fail SEO score. citeturn112108search3

Reduce false positives

Shared navigation, legal notices, product boilerplate and template text can make unrelated pages look similar. Paste the main content when possible. Compare pages that serve different search intents separately from pages that intentionally reuse the same standard copy.

Frequently asked questions

Does this tool check live website URLs?
No. It compares text pasted into the browser, so the page content stays local in this version.
Does high similarity prove Google sees duplicate content?
No. It is a review signal. Search engines use multiple page-level signals when clustering and selecting canonical URLs.
What similarity formula is used?
The page-pair percentage is Jaccard similarity over unique detected words: shared unique words divided by the union of unique words.
Can I compare more than two pages?
Yes. Add multiple sections separated by the --- PAGE BREAK --- marker, then the tool compares every page pair.

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