Is Domain Name Case Sensitive?

In this post you will get a simple answer to your “Is Domain Name Case Sensitive?” question, and useful information about case sensitiveness in URL parts.


Domain names are case insensitive. It means, if you write domain name in uppercase, lowercase or mix, then in all cases – you will land on the same page.

For example,

If you type in the browser ““, “https://TECHPOSTPLUS.COM” or ““, then in the result your browser will open the same page for all cases.

Domain name case insensitivity helps to create uniqueness between domain names.


In URL, string(directory, page or file) after the domain name is case sensitive.

e.g., “” URL is different from ““.

Domain name related post