HDML File Extension
Handheld Device Markup Language Format
- File Type hdml
- Developer Openwave
- Popularity
- Application Sublime Text
- Category Web Files
What is a HDML file?
Handheld Device Markup Language Format, identified by the HDML extension, is a Web Files type and includes 283 files.
HDML files are supported by Windows, Mac OS and Linux. You can open a HDML file using one of 2 programs, for example Sublime Text and Atom.
Programs that support HDML files
How to open a HDML file?
The most common reason why a HDML file cannot be opened is the absence of required software. To fix this, select a compatible program from the list. Then visit the official developer website via the provided link, download the program, and install it on your system.
The most popular programs for working with HDML files are Sublime Text and Atom. To get the latest version of Sublime Text, open the Sublime HQ Pty website where a universal installer for all operating systems is available.
Once setup is done, your operating system should assign Sublime Text as the default app for HDML files.
Make Sublime Text the default HDML viewer
Changing the default program in Windows
- Start by right-clicking on your HDML file and selecting the "Open With" option. From there, click "Choose another app" to continue;
- Inside the popup window, scroll through the list of applications and specifically choose Sublime Text as the application to associate with your HDML file;
- Check the "Always use this app" checkbox and click "OK".
Change the default app to open files on Mac
- Right click or use Control + Left Click on the desired HDML file to access a dropdown menu of actions;
- Select "Open in application" and click "Other";
- Scroll down to the bottom of the window, where you will find the "Enable" menu. Default, "Recommended Programs" will be selected;
- In this menu, choose "All Programs" and navigate to Sublime Text. Check the box next to "Always open in app" to make it the default program.
How to edit a HDML file?
To edit HDML files, you need to install specialized software that allows you not only to open but also to modify web files. Online HDML editors usually provide fewer features than software created specifically for Handheld Device Markup Language Format.
List of Top HDML editors 2026
Following these criteria, we have put together a list of recommended HDML editors.
| HDML Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| Sublime Text | Sublime HQ Pty | Windows, Mac OS, Linux | 4.6 out of 5 (39 reviews) |
| Atom | - | Windows, Mac OS, Linux | 4.1 out of 5 (36 reviews) |
Finding answers to HDML file problems
If you encounter issues with HDML files, don’t worry—most can be fixed with minor software adjustments. Refer to the troubleshooting tips below.
What are the signs that my HDML file is damaged?
Corrupted HDML web files may have one or more of the following symptoms:
- Poor performance when editing a file in Sublime Text;
- Opening or processing the file in Sublime Text or other programs causes instability or crashes in the program;
- The file shows errors when trying to open it or does not open completely;
- Unexpected expansion of the total size of the HDML file;
- Working with the file triggers the display of error messages;
Why does Sublime Text quit or crash unexpectedly?
Sublime Text crashes can be attributed to outdated software. Make sure you have installed the latest updates for Sublime HQ Pty products.
A computer restart is often the key to solving numerous common problems. That’s why, it is recommended to restart the computer before making any changes to the software settings.
What methods can be used to repair a damaged HDML file?
Use a recovery program to open the damaged HDML file and navigate to the "Repair" menu item. Wait for the recovery process to finish, as it will automatically repair damaged web files.