Windows
Compatible applications
Quick Facts
Basic information about this file format
Extension
.ADML
File Type
Administrative Template Language File
Category
Data
Best first step
Use compatible software
Quick Summary
A practical overview of the .adml file format
The ADML file format is a language-specific resource file used in conjunction with ADMX (Administrative Template) files within the Microsoft Windows Group Policy framework. While ADMX files contain the structural and logical definitions of Group Policy settings—such as registry keys and policy cate…
File extension
.ADML
File type
Administrative Template Language File
Category
Data
Recommended action
Open with a trusted compatible app
How to open a .adml file
Start with a trusted app that supports this format
- Check the file extension carefully and confirm that the file name really ends with .adml.
- Use software that supports this file type. If one app does not work, try another compatible program for the same platform.
- Update the application if the file was created by a newer version of the software.
- Scan files from unknown sources before opening them, especially documents, archives, scripts, installers, and executable files.
What is a .adml file?
File extension details and usage information
The ADML file format is a language-specific resource file used in conjunction with ADMX (Administrative Template) files within the Microsoft Windows Group Policy framework. While ADMX files contain the structural and logical definitions of Group Policy settings—such as registry keys and policy categories—they are language-neutral. The ADML file provides the localized strings, labels, and help text that appear in the Group Policy Object Editor. When a system administrator opens the Group Policy Editor, the system references the ADMX file for the policy structure and the corresponding ADML file (located in a language-specific subfolder, such as 'en-US') to display the interface in the appropriate language. This separation allows Microsoft and third-party developers to support multiple languages without duplicating the underlying policy logic. ADML files are essentially XML-based documents that map unique string identifiers defined in the ADMX file to human-readable text, ensuring that policy settings are understandable to administrators regardless of their local language settings.
Software Compatibility
Programs that may open or work with .adml files
macOS
Compatible applications
Linux
Compatible applications
Mobile
Mobile applications
Can .adml files be converted?
Options for saving or exporting this file to another format
In many cases, a .adml file can be converted by opening it in compatible software and using an option such as Save As, Export, or Convert. The available output formats depend on the file type and the application used.
- Use the original software that created the file when possible.
- Check whether the application supports exporting to common formats.
- Be careful with online converters when working with private, business, or sensitive files.
- If conversion fails, the file may be corrupted, incomplete, encrypted, or not actually a .adml file.
Why can't I open a .adml file?
Common reasons this file type may not open correctly
Wrong software
The file may require a specific program that supports the .adml format.
Incorrect extension
The file extension may have been renamed manually, even though the actual file format is different.
Corrupted file
The file may be incomplete, damaged during download, or transferred incorrectly.
Outdated app
Your software may need to be updated before it can open newer versions of this file format.
Frequently Asked Questions
Common questions about .adml files
To open a .adml file, use software that supports this file format.
- Group Policy Object Editor
- Microsoft Management Console
- Notepad
- Visual Studio Code
- TextEdit
Open the file in compatible software and look for options such as Save As, Export, or Convert. If no export option is available, the file may require a specialized converter or the original application that created it.
- Verify that the file extension is correct.
- Install or update compatible software.
- Try another application that supports this format.
- Check whether the file is corrupted, incomplete, or encrypted.
A file extension alone does not guarantee whether a file is safe or unsafe. Only open files from trusted sources, scan unknown files before opening them, and be especially careful with executable, script, archive, and document files.
File safety tips
Use caution with unknown files
Only open files from trusted sources. Before opening a .adml file, scan it with antivirus software, verify that the file extension is expected, and avoid running unknown executable, installer, macro-enabled document, or script files.