Manoj

For creating a copy of posts and pages while retaining all the styling, content, title, meta info and taxonomies.
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In Posts/Pages screen, you can click on ‘Copy As New Draft’ link below the post/page title: this will immediately create a copy and return to the page.
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In Posts/Pages screen, you can click on ‘Edit As New Draft’ link below the post/page title: this will create a copy and redirect to edit the page.
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In Edit Posts/Edit Pages screen, you can click on ‘Edit As New Draft’ link above ‘Publish’ button: this will create a copy and redirect to edit the page.
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Please Note: No any kind of settings needed.

AMS Post And Page Duplicator

Shail Mehta

This Plugin is use for create functionality to duplicate any page including custom fields
Primary Features 
* Very easy to create duplicate page 
* This plugin is free

sm page duplicator

This Plugin is use for create duplicate page.

AMS Post And Page Duplicator vs sm page duplicator