Remove Yoast HTML Comments “This site is optimized with the Yoast WordPress SEO plugin”

functions.php

// Add to your Wordpress Theme's functions.php

// Remove All Yoast HTML Comments
// https://gist.github.com/paulcollett/4c81c4f6eb85334ba076
add_action('wp_head',function() { ob_start(function($o) {
return preg_replace('/^\n?<!--.*?[Y]oast.*?-->\n?$/mi','',$o);
}); },~PHP_INT_MAX);

Thanks, works for me /May, 07, 2016/

It was working great. Now with yoast seo premium v3.4.2, this will break the colored bulletin in top of the admin bar, can you update the code?

Thanks.

how not remove title?

@worldsdream Can you link or send me a copy of yoast seo premium v3.4.2? I'll get this updated

Replace the regex with this: '/^<!--.*?[Y]oast.*?-->$/mi'

This worked perfect for me ... thanks!

Thanks @eric-mathison, I've updated the gist

Thanks, now all is working with the latest Yoast!

thanks!! in Yoast SEO plugin v5.2 well working

Not working for me:

Wordpress 4.8.2
Yoast SEO 5.5.1

It working,super!

I've just updated the above gist. Tested with:

Wordpress 4.9
Yoast SEO 5.7.1

(/cc @mike-source)

Yoast 5.7.1
WP 4.8.3

If you activated "forced rewrite titles" don't work...
If "forced rewrite titles" is checked, the title tag it does not printt.... :/

UPDATED!
Ok, I solved it

Uncheck "forced rewrite titles"
In your header.php or your head template add this:
<title><?php wp_title(''); ?></title>

Yoast SEO plugin v5.8
WP 4.9

Not working for me.

It works (WP 4.9 + plugin v5.8) if you get rid of the check on 'WPSEO_VERSION' but I am not sure of any performance or reliability implications.
Specifically:

//if (defined('WPSEO_VERSION')) {
  add_action('wp_head',function() { ob_start(function($o) {
  return preg_replace('/^\n?\<\!\-\-.*?[Y]oast.*?\-\-\>\n?$/mi','',$o);
  }); },~PHP_INT_MAX);
//}

Edit: I just looked through the code and the check for WPSEO_VERSION should really work, so I am a bit puzzled myself. Anyway, consider this a drive-by comment as I wasn't specifically here for this, but just stumbled upon it. But, this is truly a wake up call for me to scrutinize these WordPress plugins more thoroughly.

Performance wise, it would be exactly same. I'll update the code above

Nice, thx u

This snippet works fine but my functions file complains that the code is not valid!

@TomasHurtz, should be valid PHP5+, maybe your code editor is reporting for earlier versions of PHP.

Glad to hear it's still working for the community!

Thanks. Works great with Yoast v8.2.

It works (WP 4.9 + plugin v5.8) if you get rid of the check on 'WPSEO_VERSION' but I am not sure of any performance or reliability implications.
Specifically:

//if (defined('WPSEO_VERSION')) {
  add_action('wp_head',function() { ob_start(function($o) {
  return preg_replace('/^\n?\<\!\-\-.*?[Y]oast.*?\-\-\>\n?$/mi','',$o);
  }); },~PHP_INT_MAX);
//}

Edit: I just looked through the code and the check for WPSEO_VERSION should really work, so I am a bit puzzled myself. Anyway, consider this a drive-by comment as I wasn't specifically here for this, but just stumbled upon it. But, this is truly a wake up call for me to scrutinize these WordPress plugins more thoroughly.

+1

i use yoast 8.3 and wp 4.9

I tried, and it happened. I cited my source in a paper, thank you.
https://mertsabuncu.com/wordpress-sayfa-kodlarindan-yoast-seo-yorumlarini-kaldirin/

thanks for the information
I tried it

https://www.paktogel.com/data-keluaran-singapura-live-result-sgp-prize/

thanks for the information
I tried it

http://datapengeluarantoto.com/nomor-pengeluaran-togel-hongkong-result-hk-live/

since last update of yoast 11 there is a problem with this cause it is printing code on header

Since plugin version 11 the original code breaks the Knowledge Graph & Schema.org contents (opening <script type='application/ld+json' tag disappears).
So, change preg_replace() pattern as follows. May be somebody have more elegant solution.

preg_replace('/\n?<.*?yoast seo plugin.*?>/mi','',$o);

Hi all, I found this function which seems lighter than a "heavy" replace:

/**
 * Disable Yoast's Mark and its version.
 */
add_action( 'template_redirect', function () {
     if ( ! class_exists( 'WPSEO_Frontend' ) ) {
        return;
    }
    $instance = WPSEO_Frontend::get_instance();
     // make sure, future version of the plugin does not break our site.
    if ( ! method_exists( $instance, 'debug_love') ) {
        return ;
    }
    // ok, let us remove the love letter.
     remove_action( 'wpseo_head', array( $instance, 'debug_love' ), 2 );
}, 9999 );

Also please note that as said by @maxyudin , the previous code breaks the script tag, adding the printed code in the body.

Looks good.. thanks dude... I'll try... http://ideunik.com/

The method seems to be called "debug_mark" in the latest version of Yoast,
So the adapted code of @DennysDionigi working for me on the last version is

/**
 * Disable Yoast's Mark and its version.
 */
add_action( 'template_redirect', function () {
	if ( ! class_exists( '\WPSEO_Frontend' ) ) {
		return;
	}
	$instance = \WPSEO_Frontend::get_instance();
	// make sure, future version of the plugin does not break our site.
	if ( ! method_exists( $instance, 'debug_mark') ) {
		return ;
	}
	// ok, let us remove the love letter.
	remove_action( 'wpseo_head', [ $instance, 'debug_mark' ], 2 );
}, 9999 );

Thanks

Now use the below code to remove Yoast HTML Comments from version 14.1
Yoast SEO Plugin Version: 14.1

add_filter( 'wpseo_debug_markers', '__return_false' );