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.HDML File Extension

A .HDML file is a Handheld Device Markup Language File, created by Openwave.

Open with Edit with a text editor. Available for Windows and Mac.

What is a .HDML file?

The .HDML file extension stands for Handheld Device Markup Language File. This type of file is a web page that is specially made to work on mobile devices like smartphones and other portable gadgets. HDML is a kind of language that is built on top of SGML, which is another language used for making .SGML files. The main purpose of HDML files is to create web pages that can be easily displayed on small screens found on mobile devices.

To open or edit HDML files, you can use a simple text editor on your computer. This means you can use programs like Notepad on Windows, TextEdit on Mac, or any other basic text editing software you have. However, it's important to know that regular web browsers on your computer, like Chrome or Firefox, cannot open HDML files directly because they do not support this format.

If you have the right kind of mobile device, you might be able to view HDML files using a specific browser called the Openwave UP.Browser. This browser was designed to work with HDML files and other similar types of files.

HDML was first introduced in 1996 by a company called Unwired Planet, which is now known as Openwave. But, by around 1999, HDML started to be replaced by a new language called Wireless Markup Language (WML). WML was influenced by HDML but was designed to be more compatible with a wider range of devices.

In summary, .HDML files are web pages made for mobile devices, created using a specific language. They can be edited with basic text editors on a computer but need special browsers to be viewed on mobile devices. Over time, HDML has been replaced by newer technologies, but it played an important role in the development of mobile web browsing.

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