DSmidge

<p>When WP is opened through HTTPS, all local absolute links in content are replaced from HTTP to HTTPS.<br />
Additional hosts can be specified through admin interface (like graph.facebook.com which works on HTTP and on HTTPS).<br />
Options HOME and SITEURL shuld be changed to HTTPS when enabling this plugin.</p>


HTTP to HTTPS link changer by Eyga.net

When WP is opened through HTTPS, all local absolute links in content are replaced from HTTP to HTTPS.

Rehmat Alam

<p>WP SSL Redirect simply forces the SSL on your WordPress website by applying a 301 redirect from the HTTP path to HTTPS path. Please note that this plugin doesn’t install or configure any SSL certificate, instead it simply applies a 301 redirect to force the SSL on a WordPress website where a valid SSL is already properly installed.</p>
<h3>1.3</h3>
<ul>
<li>Added options to force www or non-www</li>
</ul>
<h3>1.3.1</h3>
<ul>
<li>A minor bug fix regarding query vars</li>
</ul>
<h3>1.3.2</h3>
<ul>
<li>Fixed a major bug related to sub-directory installations</li>
</ul>
<h3>1.4</h3>
<ul>
<li>Rewrote the redirection code to make it even simpler</li>
<li>Disabled the website URL update in the database</li>
</ul>
<h3>1.5</h3>
<ul>
<li>Bug fixes</li>
</ul>
<h3>1.6</h3>
<ul>
<li>Compatibility test with WordPress 6.1</li>
</ul>


WP SSL Redirect

Worked for me.

A very tiny plugin to force SSL on WordPress websites (via 301 redirects for SEO purpose).

HTTP to HTTPS link changer by Eyga.net vs WP SSL Redirect