Stoyan Stefanov has written up a post sharing the process he followed to migrate a WordPress blog to HTTPS on the Dreamhost hosting service.

Now some folks reminded me recently that the Perf calendar was not yet migrated to HTTPS... True enough. I have to do it. Eventually. In any normal situation I'll procrastinate indefinitely, but since I had more pressing things to do and "Anyone can do any amount of work, provided it isn’t the work he is supposed to be doing at that moment"... I bit the bullet.

Below are the steps that worked for me with a WordPress blog, hosted on DreamHost. The steps are still relevant to any WordPress site, just using Dreamhost as an example and since Dreamhost makes many of the steps easy.

He breaks the process down into six parts, including a bit of testing at the end:

• Setup free SSL certificate thanks to Let's Encrypt
• Backup all the things (or just the blog's database or just the table with the posts)
• Search and replace internal references (images and links) WP settings
• Redirect http to https permanently in .htaccess
• Test/tweak?

Each step comes with the code or configuration you'll need to set up HTTPS and some screenshots where necessary, like with the Let's Encrypt setup.