Really Simple SSL Pro

Really Simple SSL Pro is the advanced extension of the popular Really Simple SSL security plugin for WordPress, designed to take HTTPS management and site protection to the next level. It is intended for website administrators who already have an SSL certificate or plan to implement one, and who want to avoid mixed content issues, browser warnings, loss of trust, and security vulnerabilities related to HTTPS implementation.

The plugin focuses on a very specific goal: making the transition to HTTPS in WordPress stable, consistent, and manageable in the long term. Its mixed content scanner detects files requested over HTTP on both the front-end and back-end, and offers a repair button to fix them automatically. When a resource cannot be fixed automatically, the advanced scanner identifies the exact source of the problem so you can resolve it manually without wasting time searching through every page.

Among its most notable features is enabling HTTP Strict Transport Security (HSTS), which forces browsers to communicate only over HTTPS, and the ability to submit your site to the HSTS preload list maintained by Chrome and Firefox. It also includes essential security headers such as X-Content-Type-Options, X-XSS-Protection, X-Frame-Options, Referrer Policy, and Content Security Policy, protecting visitors against clickjacking, cross-site request forgery attacks, and credential theft.

The Pro version also adds advanced WordPress hardening measures, such as choosing a custom login URL, automatic checking and correction of file permissions, renaming the database prefix, disabling application passwords, and controlling administrator creation. The login protection system includes two-step verification, two-factor authentication (2FA) with TOTP, passwordless login via passkeys, strong password policies, and login attempt limits with CAPTCHA option.

The plugin also incorporates an efficient firewall that blocks bots, crawlers, and malicious actors through automated and customizable rules, IP blocking, region-based blocking, and protection against 404 errors. Vulnerability measures allow forcing updates of compromised plugins and themes, or quarantining them when they cannot be updated, ensuring that no critical vulnerability goes unattended.

With over 4 million active installations in its free version, Really Simple SSL Pro is the natural choice for those seeking a complete, lightweight, and high-performance security solution without sacrificing site speed or user experience.