Really Simple SSL is built to be very lightweight: the majority of the files is not even loaded when a visitor requests the frontpage. But if you want to remove the plugin after enabling SSL, do NOT use the WordPress deactivation in the plugins overview.
Important! Deactivating the plugin in WordPress reverts your site to http
Most users that do this want do do this because their site has issues on SSL, and expect the plugin to leave the site as it was before the activation. Therefore, the plugin reverts the site to http on deactivation. All changes are removed. Your site_url becomes http again, the .htaccess redirect will get removed.
Is it possible to deactivate Really Simple SSL without losing SSL?
Yes, it is possible, by renaming the plugin folder through FTP. But please note that:
- The mixed content fixer won’t work anymore
- If you use wp redirect for redirection, this won’t work anymore
- The SSL redirect on rest_api redirect won’t be active anymore
What stays after deactivating the plugin:
- If enabled, the .htaccess redirect
- Your site_url will stay on https
- Any wp-config fixes that were needed to do the change.
If these last three is sufficient for you, you can deactivate by renaming the plugin folder through FTP. To do this, open your website in your FTP Client, and navigate to wp-content/plugins/really-simple-ssl. Rename this folder to really-simple-ssl-bkp. Now the plugin is deactivated, but the deactivation procedure does not run and the site url, wpconfig fix and .htaccess redirect will stay.