ADR File Extension

ADR file icon
Opera Bookmarks Format

What is ADR file?

An .ADR is a web file that is created by the Opera Web browser.  The ADR file contains a list of bookmarks that is exported by the browser, and the browser is supported on Windows, Unix, and Mac OS platforms. Further, the ADR file bookmarks list can be imported into the web browser by using the export and import features supported by the browser. 

Programs which support ADR file extension

Below you will find an index of software programs that can be used to open ADR files divided into 3 categories according to system platform supported. Files with ADR extension, just like any other file formats, can be found on any operating system. The files in question may be transferred to other devices, be it mobile or stationary, yet not all systems may be capable of properly handling such files.

Programs that support ADR file

Windows Windows
Linux Linux

Updated: 05/29/2020

How to open file with ADR extension?

Being unable to open files with ADR extension can be have various origins. What is important, all common issues related to files with ADR extension can be resolved by the users themselves. The process is quick and doesn’t involve an IT expert. We have prepared a listing of which will help you resolve your problems with ADR files.

Step 1. Download and install Opera

Install software to open ADR file The most common reason for such problems is the lack of proper applications that supports ADR files installed on the system. The solution to this problem is very simple. Download Opera and install it on your device. The full list of programs grouped by operating systems can be found above. If you want to download Opera installer in the most secured manner, we suggest you visit website and download from their official repositories.

Step 2. Update Opera to the latest version

Update software that support file extension ADRYou still cannot access ADR files although Opera is installed on your system? Make sure that the software is up to date. It may also happen that software creators by updating their applications add compatibility with other, newer file formats. The reason that Opera cannot handle files with ADR may be that the software is outdated. All of the file formats that were handled just fine by the previous versions of given program should be also possible to open using Opera.

Step 3. Assign Opera to ADR files

If the issue has not been solved in the previous step, you should associate ADR files with latest version of Opera you have installed on your device. The process of associating file formats with default application may differ in details depending on platform, but the basic procedure is very similar.

Associate software with ADR file on Windows

Selecting the first-choice application in Windows

  • Choose the Open with entry from the file menu accessed by right-mouse clicking on the ADR file
  • Click Choose another app and then select More apps option
  • To finalize the process, select Look for another app on this PC entry and using the file explorer select the Opera installation folder. Confirm by checking Always use this app to open ADR files box and clicking OK button.
Associate software with ADR file on Mac

Selecting the first-choice application in Mac OS

  • From the drop-down menu, accessed by clicking the file with ADR extension, select Information
  • Open the Open with section by clicking its name
  • Select the appropriate software and save your settings by clicking Change all
  • Finally, a This change will be applied to all files with ADR extension message should pop-up. Click Continue button in order to confirm your choice.

Step 4. Check the ADR for errors

If you followed the instructions form the previous steps yet the issue is still not solved, you should verify the ADR file in question. Problems with opening the file may arise due to various reasons.

Check ADR file for viruses
1. Check the ADR file for viruses or malware

If the ADR is indeed infected, it is possible that the malware is blocking it from opening. Scan the ADR file as well as your computer for malware or viruses. If the ADR file is indeed infected follow the instructions below.

2. Verify that the ADR file’s structure is intact

If you obtained the problematic ADR file from a third party, ask them to supply you with another copy. The file might have been copied erroneously and the data lost integrity, which precludes from accessing the file. It could happen the the download process of file with ADR extension was interrupted and the file data is defective. Download the file again from the same source.

3. Verify whether your account has administrative rights

Some files require elevated access rights to open them. Switch to an account that has required privileges and try opening the Opera Bookmarks Format file again.

4. Make sure that the system has sufficient resources to run Opera

The operating systems may note enough free resources to run the application that support ADR files. Close all running programs and try opening the ADR file.

5. Ensure that you have the latest drivers and system updates and patches installed

Up-to-date system and drivers not only makes your computer more secure, but also may solve problems with Opera Bookmarks Format file. It may be the case that the ADR files work properly with updated software that addresses some system bugs.

Do you want to help?

If you have additional information about the ADR file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on ADR file.

Top File Extensions
Show more
File Extension of the day
lnk icon


Windows Format Shortcut

Files with the LNK extension are the shortcut files used in Windows system. The contain information about the type and location (the URI identifier...