Difference between ".htm" and ".html
posted 13 years ago
All of these files types are just HTML (HyperText Markup Language) code. A .HTM and a .HTML file are identical, simply different extensions. They do the exact same thing, but most people try to stick to .HTML because this is the way is was originally intended. The .HTM extension was used for operating systems like Windows 3.x that did not support long file names.