Master Page Converted From an HTML Page Doesn't Have an .aspx File, Instead Has a .master File

Question

I have created a SharePoint Master page by converting an HTML File. The conversion was successful. After the conversion there should be 1 pair of files with .html & .aspx extensions.

Unfortunately after the conversion I got an .html file and a .master file.

I found this issue when I tried to add a SharePoint Search Box Web Part using SharePoint Designer 2013 to the custom master page and also I got the below message too.

The message's screenshot

Answer 1

I have found the solution. I just have to add the webpart using the 'Design manager's', 'Edit Master Pages' option.

Thanks for your help!

Chiranthaka