Opening ADM Files

The ADM file type is primarily associated with Local Group Policy Editor.

ADM	File extension: ADM
	File type:	policy template

What is an ADM file?

ADM files mostly belong to Local Group Policy Editor by Microsoft. An ADM file is a template which Local Group Policy Editor (GPEdit) uses to describe registry-based policy settings on Windows. Users with administrator access on Windows can access these settings from GPEdit. Another type of ADM file contains temporary data automatically by generated by Portfolio digital asset management software. Advantage Database Server uses a different type of ADM file to save temporary data. ADM is also the filename extension of waypoints, routes, and tracks saved by Garmin chart plotters. BaseCamp can import and display such GPS data. Alphacam woodworking software uses an ADM file to save a diecut macro.

How to open an ADM file

You need a suitable software like Local Group Policy Editor to open an ADM file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your ADM file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a ADM file directly in the browser:. Just drag the file onto this browser window and drop it.

Online ADM Text Viewer

Choose your .adm file to analyze

or drag and drop it here

Online File Viewer

✈

Read our privacy guarantee in Filext’s terms and privacy policy

Please allow ads on our site

This helps us keep our servers running. Then re-upload your file to view it.

Click here to see how to disable the ad blocker for filext.com

Programs that open and convert ADM files:

Local Group Policy Editor by Microsoft
See the previous paragraphs to learn more about the main application. ADM files are often referred to as Local Group Policy Editor systems because this type of file is primarily created or used by this software.
Addict (compiled dictionary) by Addictive
Addict is a software suite that adds thesaurus, spell-check, and live spelling support to various applications. It saves a compiled dictionary in an ADM file. This file format is classified as Database.
Advantage Database Server (database memo) by SAP
Advantage Database Server is a relational database management system for enterprise applications. It saves a database memo in an ADM file. This file format is classified as Database.
After Dark (screen saver module) by Infinisys & Berkeley Systems
After Dark is a discontinued screen saver engine for Windows and macOS. Its screen saver modules are saved in ADM files. This file format is classified as Settings.
Alphacam (diecut parameter macro) by HEXAGON
Alphacam is a computer-aided design and manufacturing software suite for the woodworking industry. It saves a diecut macro in an ADM file. This file format is classified as CAD.
BaseCamp (user data) by Garmin
BaseCamp is a trip planning and navigation software for Windows desktop. It can import waypoints, routes, and tracks saved in ADM files created by various Garmin chart plotters. This file format is classified as Database.
Creative Suite (application bar) by Adobe
Creative Suite is a discontinued video editing, graphics design, and web development software suite. Its application bar is saved in an ADM file. This file format is classified as Data.
Portfolio (admin-level acces flag) by Extensis
Portfolio is a digital asset management software. ADM is the filename extension of a zero-length temporary file which Portfolio generates when a catalog (FDB file) is open in admin mode. This file format is classified as Misc. Related links: Mark Anderson's Portfolio FAQ
SCSI Port Driver (data) by Microsoft
SCSI Port Driver is component is a Windows storage architecture component which emulates an SCSI adapter. It allows developers to easily create storage class drivers with little to no concern for specific system hardware features. SCSI Port Driver uses data saved in an ADM file. This file format is classified as Data.

ADM format details:

A file format defines how the data in the file is structured. The first characters in a file identify the file format, for example, HTML files start with the bytes <html>. File extension, signature and file format must match; otherwise errors will occur when the file is opened. If there are problems opening a file, you must first determine the file format used. Our evaluation of the ADM files is as follows:

The ADM file extension includes different formats for the applicable programs. But the following two file formats are common:

40% of all ADM files start with the bytes 00 00 00 00 00 00 00 00, which are crucial for this file format. They consist of illegible, cryptic characters. The file size is in the range of 180 KB to 1 MB. The file type is very old but is also used today. Certain words are almost always found in the files, such as DSKIMG, GARMIN and USERDATA. A common filename is UserData.ADM. These files are often associated with waypoints.
20% of all ADM files use the ZIP algorithm, multiple files are compressed and combined into one ADM file. Such a ZIP file contains 3 to 3 files with names like adm-catalog-files-1.gz, atlasmapping-UI.1.json and \lib\. If you'd like to see the images and files included, just rename the file extension to .zip and double-click. A typical file size is 2 KB. Several words can almost always be found in the files, e.g. atlasmapping-UI.0.json. The file name atlasmap-mapping.adm is characteristic of these files.

All other ADM files (40%) have no uniform format, frequently e.g. Windows Policy Administrative Template and Addict compiled dictionary. Sometimes used for dayzserver. If you want to find out which format your ADM file belongs to, just click on the button "Choose your .adm file to analyze".

Technical Data for ADM File Extension

File classification:

System

Related files:

adt, ada, garmin, adi, amd, admx, adml, mdmp, pdf, appref-ms, db, txt, dll, xml, exe, zip

an adm policy template is a special file format by Microsoft and should only be edited and saved with the appropriate software.

How to solve problems with ADM files

Associate the ADM file extension with the correct application.
Update your software that should actually open policy templates. Because only the current version supports the latest ADM file format. Search, therefore, e.g. on the Microsoft manufacturer website after an available Local Group Policy Editor update.
To make sure that your ADM file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .ADM file online - secure, fast, and no downloads needed.