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SEO & Marketing

Duplicate Content Checker

Compare two texts and see how much they share, with the repeated passages highlighted in both.

  • Runs in your browser
  • Works on mobile
  • In: TEXT
  • Out: TEXT
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About Duplicate Content Checker

Paste two texts and see how much wording they have in common: the share of each that appears in the other, the overall similarity, and every repeated passage highlighted in both panes.

It works on shingles - every run of five consecutive words, a length you can change - which is the method plagiarism checkers use. Long identical runs are what matter; two texts on the same subject always share a few short phrases.

Be clear about what this is not: it compares only the two texts you paste and never searches the web, so it cannot tell you whether a page was copied from somewhere you have not pasted here.

How to use it

  1. 1Paste the first text on the left and the second on the right.
  2. 2Leave the phrase length at five words, or change it.
  3. 3Read the overlap percentages and the highlighted passages.
  4. 4Review the longest shared passages to decide what to rewrite.

Questions

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