Compare your web pages or articles for uniqueness
To avoid ending up in Google's supplemental index, try to keep document similarity index as low as possible.
Similarity Index
(out of 100, 0 is the best)
Like this utility? Feel free to link to it from your web page.
<a href="http://www.seotomata.com/dupweb.php">Online duplicate content checker<a>
<a href="http://www.seotomata.com/dupweb.php">Article similarity index<a>
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