File extension ADR
| File type | Opera Bookmarks Format |
| Developer | N/A |
| Ads |
What is a ADR file?
ADR file format is used by Opera, a popular web browser. ADR file stores all bookmarks created by user. Bookmarks can be considered as ‘shortcuts’ to websites, usually those whose adresses are hard to remember.
Bookmarks created with other web browser can be exported into an ADR file. ADR file can also be used to store bookmarks when reinstalling system or changing device. Bookmarks can be grouped into folders.
Program(s) that can open the .ADR file
How to open ADR files
If you cannot open the ADR file on your computer - there may be several reasons. The first and most important reason (the most common) is the lack of a suitable software that supports ADR among those that are installed on your device.
A very simple way to solve this problem is to find and download the appropriate application. The first part of the task has already been done – the software supporting the ADR file can be found in the table. Now just download and install the appropriate application.
Possible problems with the ADR format files
The inability to open and operate the ADR file does not necessarily mean that you do not have an appropriate software installed on your computer. There may be other problems that also block our ability to operate the Opera Bookmarks Format file. Below is a list of possible problems.
- Corruption of a ADR file which is being opened
- Incorrect links to the ADR file in registry entries.
- Accidental deletion of the description of the ADR from the Windows registry
- Incomplete installation of an application that supports the ADR format
- The ADR file which is being opened is infected with an undesirable malware.
- The computer does not have enough hardware resources to cope with the opening of the ADR file.
- Drivers of equipment used by the computer to open a ADR file are out of date.
If you are sure that all of these reasons do not exist in your case (or have already been eliminated), the ADR file should operate with your programs without any problem. If the problem with the ADR file has not been solved, it may be due to the fact that in this case there is also another rare problem with the ADR file. In this case, the only you can do is to ask for assistance of a professional staff.
Similar extensions
| .a4p | Adobe Authorware Package Without Runtime |
| .a5w | Adobe Authorware Unpackaged Format |
| .adr | Opera Bookmarks Format |
| .aex | Greetings Card Format |
| .alx | BlackBerry Application Loader Format |
| .an | Adobe Edge Animate Project Format |
| .ap | Fifth Generation Systems Active Page Format |
| .aro | SteelArrow Script Format |
How to associate the file with an installed software?
If you want to associate a file with a new program (e.g. my-file.ADR) you have two ways to do it. The first and the easiest one is to right-click on the selected ADR file. From the drop-down menu select "Choose default program", then click "Browse" and find the desired program. The whole operation must be confirmed by clicking OK. The second and more difficult to do is associate the ADR file extension to the corresponding software in the Windows Registry.
Is there one way to open unknown files?
Many files contain only simple text data. It is possible that while opening unknown files (e.g. ADR) with a simple text editor like Windows Notepad will allow us to see some of the data encoded in the file. This method allows you to preview the contents of many files, but probably not in such a structure as a program dedicated to support them.