Google announced experimental HTTPS support on Blogger (Blogspot) last September. An announcement today companys reports that the tests went well and so the protocol comes as a default for all blogs of users of the platform.
Back in September, the company had added a setting to Blogger management that allowed users to enable HTTPS secure connections on their blogs.
This setting no longer exists as the feature is valid by default on all blogs. In place of the removed setting there is a new option called "HTTPS redirect."
This option, if enabled, will automatically redirect all blog visitors to HTTPS URL instead of HTTP links.
This redirect works automatically, and users do click on links that are published on social networks or other pages will automatically be transferred to secure HTTPS connections, without you having to do anything.
In September, with the first tests, bugs were encountered on subdomain blogs, such as username.blogspot.com, and not on blogs that work with custom domains, such as userdomain.com.
The error was known as "mixed content" and according to Google some subdomains blogs are likely to encounter similar errors.
So he created a tool to help you identify mixed content errors, and fix them websites you.