Patryk

Force protocol relative (\ instead http:\ or https:\) for files added in the content editor (eg. post, page)
Before, when add media:
<pre><code><a href="https://wordpress.org/wp-content/uploads/some-cool-photo.png"><img src="https://wordpress.org/wp-content/uploads/some-cool-photo.png" alt="Some cool photo" width="1920" height="1410" class="aligncenter size-full wp-image-19200813" /></a>
</code></pre>
After, when add media:
<pre><code><a href="//wordpress.org/wp-content/uploads/some-cool-photo.png"><img src="https://wordpress.org/wp-content/uploads/some-cool-photo.png" alt="Some cool photo" width="1920" height="1410" class="aligncenter size-full wp-image-19200813" /></a>
</code></pre>
The plugin works only for newly added media (does not change the older entries).

PRyC WP: Force protocol relative to uploaded media

Force protocol relative (\ instead http:\ or https:\) for files added in the content editor (eg. post, page)

janiko

This very simple plugin aims at avoiding mixed content when using https for wordpress sites.
<h4>Principle</h4>
When you are using HTTPS for browsing, all content resources will point to https. All ‘http’ references will be changed to ‘https’.
On the contrary, if you want HTTP browsing, all references will be changed to ‘http’, which can be useful if you are behind a proxy that filters https.

Https Switcher

Thanks @janiko for creating this great plugin! It works fantastic on my sites and even your source code looks amazing. Well done!

Simple and yet powerful!

Force http/https for resources, depending on the scheme you use.

PRyC WP: Force protocol relative to uploaded media vs Https Switcher