What is the ADP File Extension?

Researcher:   |   Amended: December 05, 2018

Microsoft Silver

ADP File Summary

File Extension ADP has three unique file types (with the primary being the Access Project Extension format) and is mostly associated with Microsoft Access (Microsoft Corporation) and five other software programs. These files can be categorized as Database Files, CAD Files, or Web Files. In the majority of cases, these files will be Database Files.

ADP files are found on both mobile and desktop platforms and can be opened using Windows, Mac, and iOS operating systems. ADP files have a "Low" Popularity Rating; this means that they are not present on most devices.

To learn more about ADP files and their associated software applications, please see the information below. Plus, we provide a basic troubleshooting guide to solve problems with opening ADP files.

Low
Prevalence
7914
Position

/ 11690

Active

Importance

5

December

2018

Refreshed

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Varieties of ADP Files

  3 known file types use this extension

Chief ADP Description

.ADP
File Ext:.adp
Class:Access Project Extension

A database project file made using Microsoft Access database program. It stores all data saved in a ADP project.

Programmer: Microsoft Corporation
Function:Database Files
Subkey: HKEY_CLASSES_ROOT\.adp

Software Programs That Open The Access Project Extension:


Microsoft Access by Microsoft Corporation

Windows

Other ADP Descriptions

.ADP
File Ext:.adp
Class:Alphacam Die-cut Post Data

CAD file associated with Alphacam, a leading CAD/CAM software solution for the Woodworking industry. This file contains die cut post data generated by the software.

Programmer: Planit Solutions, Inc.
Function:CAD Files

Software Programs That Open Alphacam Die-cut Post Data Files:


Planit Alphacam by Planit Solutions, Inc.

Compatible with:

Windows
.ADP
File Ext:.adp
Class:AOL Server Dynamic Page

This file is associated with AOLserver, America Online's Open-Source web server. ADP pages are the server-side scripting language used by AOLServer, it is used to embed source code into static HTML pages.

Programmer: AOL
Function:Web Files

Software Programs That Open AOL Server Dynamic Page Files:


Internet Explorer by Microsoft Corporation

Compatible with:

Windows
Mac

Mozilla Firefox by Mozilla

Compatible with:

Windows
Mac
iOS
Android
Linux
Solaris
illumos

Microsoft Edge by Microsoft Corporation

Compatible with:

Windows

Sublime Text by Sublime HQ Pty Ltd

Compatible with:

Windows
Mac
Linux

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ADP Popularity


File Extension Device Breakdown (desktop / mobile / tablet)

Desktop (84.34%)
Mobile (14.29%)
Tablet (1.37%)


Sources of ADP Problems


Common ADP Opening Problems

Microsoft Access Not Present

When trying to open your ADP file, you get the error "Can't Open ADP File Type". Generally, this is experienced in %%os%% because Microsoft Access isn't installed on your PC. Because your operating system doesn't know what to do with this file, you won't be able to open it by double-clicking.


Tip: Another ADP-related program can be selected to open the file by clicking "Show Apps" and finding the application.


Microsoft Access is Out-of-Date

Sometimes your installed version of Microsoft Access won't support your Access Project Extension file. Download the latest Microsoft Access version from the Microsoft Corporation website to ensure you have the correct one installed. This issue mainly occurs when your Access Project Extension file was created by a newer version of Microsoft Access than you have on your PC.


Tip: Investigate your ADP file by right-clicking and selecting "Properties" to find clues on what version you need.


Primarily, problems experienced when opening ADP files are due to having the incorrect version of Microsoft Access installed on your computer.


Other ADP File Opening Causes

Even with the correct version of Microsoft Access installed, you can still experience difficulties opening ADPs. There can be other issues - unrelated to software - preventing you from opening ADP files. These other problems include (listed in order from most to least common):

  • Windows Registry ADP file paths that are incorrect
  • Unintentional removal of the description of the ADP file inside the Windows Registry
  • Incomplete or bad installation of a software application associated with the ADP format
  • File corruption affecting your ADP file
  • Your ADP is infected with malware
  • Hardware associated with ADP has outdated drivers
  • Your PC doesn’t have enough available resources to open the Access Project Extension file

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