timpet

It adds HSTS headers to your wordpress site.
No configuration required
<h3>Arbitrary section</h3>
You may provide arbitrary sections, in the same format as the ones above. This may be of use for extremely complicated 
plugins where more information needs to be conveyed that doesn’t fit into the categories of “description” or 
“installation.” Arbitrary sections will be shown below the built-in sections outlined above.
<h3>A brief Markdown Example</h3>

HSTS strict-preload

It adds HSTS headers to your wordpress site. No configuration required

WP Fix It - WordPress Experts

WP Fix It Easy Security Headers adds a simple page under Tools → Security Headers where you can toggle common HTTP security headers:
<ul>
<li>Strict-Transport-Security (HSTS)</li>
<li>Content-Security-Policy (CSP)</li>
<li>X-Frame-Options</li>
<li>X-Content-Type-Options</li>
<li>Referrer-Policy</li>
<li>Permissions-Policy</li>
</ul>
On activation, all headers are enabled by default and you’re redirected to the settings screen.
For convenience, the page and the Plugins screen include a “Check Headers” button that opens SecurityHeaders.com with your site’s URL prefilled (built dynamically from <code>home_url()</code>).
<h3>Notes on CSP</h3>
This plugin ships with a permissive default CSP intended to “work everywhere” out of the box (allows most external sources and inline code). For stronger protection, you should harden the directives for your specific site.
<h3>Key Features</h3>
<ul>
<li>One-click toggles for popular headers</li>
<li>Dynamic “Check Headers” scan link</li>
<li>Uses the WordPress Settings API (nonce + capability checks)</li>
<li>Output escaping and sanitization following PHPCS</li>
</ul>

Fix It Easy Security Headers

Configure core HTTP security headers for your WordPress site in a few clicks.

HSTS strict-preload vs Fix It Easy Security Headers