How to open .MARKDN file extension?

If you cannot open a new file that has been saved in the .MARKDN format you need to download the appropriate software. The manufacturer of .MARKDN files is John Gruber; .MARKDN files belong to the Developer Files category. After downloading the application from the list available on our website just run an unknown file, and as the default set the newly installed application supporting the .MARKDN files. Activities performed in the order described should solve the problems with all the files in the .MARKDN format.

• What is .MARKDN file?
• How to open .MARKDN file?
• What is .MARKDN file?