amir tohidlo

Safe Headers Scanner helps WordPress administrators identify common issues that may cause header-related problems. 
The plugin scans installed themes and plugins for: 
* Unnecessary whitespace before <code><?php</code> tags 
* Extra whitespace after closing <code>?></code> tags 
* Direct output (e.g., <code>echo</code>, <code>print</code>) before headers are sent
Results are displayed in a clear report, so you can review and fix potential issues easily.

Safe Headers Scanner

Scan themes and plugins for potential header issues such as whitespace before/after PHP tags or direct output before headers.

jonkemp

Removes unwanted tags from your WordPress header.
The function wp_head; found in the header.php template file adds unnecessary tags to your WordPress template. These tags are the RSD, or Really Simple Discovery, link, the Windows Live Writer Link and the WordPress version number. This plugin will stop all 3 tags from being automatically added to your WordPress header.

WordPress Head Cleaner

Removes unwanted tags from your WordPress header.

Safe Headers Scanner vs WordPress Head Cleaner