What is an .ADR file?
An .ADR file can belong to several different software programs. The most common use is the Opera Bookmarks File. The Opera web browser uses this format to store user bookmarks and contact information.
However, the .ADR extension also has other uses. Intuit QuickBooks uses .ADR files for auto data recovery to restore lost financial data. Games like H1Z1 by Daybreak Game Company use .ADR files in XML format for game actor runtime definitions. Older systems, such as Microsoft Access, Lotus organizers, and Psion devices, use .ADR for address book databases.
How to open .ADR files?
Because an .ADR file can be a web browser backup, a financial recovery file, or a game configuration file, you need to know its origin before opening it. You can open an Opera Bookmarks File directly in older versions of the Opera browser. You can use QuickBooks to restore an auto data recovery file. Game configuration files might open in standard text editors like Notepad or Notepad++ if they contain readable XML data.
Inspecting .ADR files online
Since an .ADR file has multiple possible meanings, we recommend using an analyzer to identify the actual format of your file. viewer.online/adr can analyze .ADR files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available.
Summary
viewer.online/adr is useful for identifying, inspecting, and understanding .ADR files without installing software or dealing with compatibility problems.