Redirect HTTP to HTTPS

On a domain you redirect with RedirHub#

Nothing to set up. Once the domain's DNS points to RedirHub, a certificate is issued automatically and http://old-site.com/page and https://old-site.com/page are both redirected to your destination in one hop. See Automatic HTTPS.

On your own website#

Install the certificate first and check that https:// works. Then add one of these rules.

Apache (.htaccess)#

apacheRewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

Nginx#

nginxserver {
    listen 80;
    server_name example.com www.example.com;
    return 301 https://$host$request_uri;
}

Cloudflare#

In SSL/TLS, open Edge Certificates and turn on Always Use HTTPS. Set the SSL/TLS mode to Full (strict) when your origin has a valid certificate; Flexible mode together with an HTTPS rule on the origin causes a redirect loop.

WordPress#

In Settings, General, change WordPress Address and Site Address to https://, then add the server rule above. Changing the addresses alone doesn't redirect old http:// links.

Avoid two hops when you also redirect www#

If http://example.com first goes to https://example.com and then to https://www.example.com, that is a chain. Write the rule so http:// and the non-canonical host go straight to the final URL, or let RedirHub handle the host you redirect away from; see Redirect non-www to www.

Result#