alphabetical list of extensions

File extension .ADR

File description

The bookmarks stored in Opera internet browser are saved with the extension ADR. This bookmark file saves the website address of webpage which is bookmarked by the user.

Along with this the bitmap image which is often the logo of the website is also saved within the file. When the user opens bookmark folder from Opera the bitmap image is used as icon to display the bookmark. Other elements which are included in ADR file format include the title of webpage and other elements which are added by the user including description of the bookmark, tags and comments. Each webpage bookmarked is saved with separate ADR file.

Description of the problem
If you have on your computer a .ADR file that you cannot open, you are in exactly the same situation as thousands of other people who have similar problems with this or any other unknown file.

There may be several reasons why you cannot open the file with .ADR extension. Directly on this website you can find a solution of the most common problem with the .ADR file – that you do not have on your computer the appropriate program to open the file.
From the list below, select the appropriate program, install it and double click on the icon of a file that did not want to open - the problem with the .ADR file extension should be solved. However, if this does not happen, go back to the website to learn about other possible causes of the error, which have been described at the bottom of the website.
Web Files
Last updated
July 21, 2014
File name: Opera Bookmarks File
Programs that will open this file:
Opera Opera
Mac OS
Mac OS
Opera Opera
Opera Opera
The .ADR file extension can correspond to several not related file formats. If there is more than one file format with the .ADR extension, you will probably find most of them at this website. Remember that you need to download a program to support a particular file type. So first look through the entire contents of the website to select a program to support just the file you have.

Other possible reasons why your .ADR file does not want to open

In addition to the problem described above, i.e. the lack of the appropriate application to support the .ADR file, there may be several reasons that cause problems with opening and operation of the data format:

1. Incorrect version of the installed application

A quite common problem is the lack of application in the appropriate version. Even if you have an application, with the help of which you should open the .ADR file, you may have a problem with it because of its version. Perhaps in previous versions the application has not yet supported the .ADR file, so download the update and check again.

2. Incorrect .ADR file association with the program

If you have already installed the appropriate application, and it is the correct version, the file may not open correctly, because the operating system does not have information that this program supports the file. So you need to "show" which program the computer should use. To do this:

  • Right-click the .ADR file
  • Go to the "Open with" - then "Choose default program ..."
  • Locate the appropriate application
  • Click "OK"

3. The file is corrupt

It also happens that the file you want to open is corrupt and therefore there is no such possibility. In this situation, you should find its different version, or ask a person from whom you got, to send it again.