Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
WordPress Allows us to make a custom link to the Posts like helloworld.html but, How to give .html extension to just one post not to all posts. It would very helpful if you provide any plugin, code or any way.
got to post
then go on specific post
click on change link and add your desire link.
i hope this helps you better.
Required, but never shown