File Extension PDX

  • Full name
    Adobe Acrobat Index Format
  • Developer
    Adobe Systems
  • Popularity
Have you encountered a problem with a PDX file? Don’t you know which program opens a file with this extension? You will find all the information you need about working with a PDX file here. In the further part of this page we have added a list of programs that should open your PDX file. It is enough you choose a proper application for your operating system, download and install it.


PDX files are index files of the Acrobat document software. Pdx files include the index of PDF documents and folders that contain documents. With the help of the PDX file, Acrobat can quickly search many pdf files.

PDX files can be created under 'Advanced-> Document Processing-> Full Text Index with Catalog' in Acrobat. In addition to a PDX file, Acrobat also creates a folder of the same name with idx files that contain the actual index entries. It should be noted that when changing the folder structure, the index may need to be recreated.

Index files can also be used by Acrobat Reader, but the associated PDF documents and idx files must exist in the original folder structure.

Programs which can open a PDX file

How to open a PDX file? Advice and guidance

Absolutely most often appearing reason that prevents you from opening the PDX file is the lack of a proper application to support it in your operating system. It is notably the first thing you need to address. When one of the programs to support a PDX file from the list is already installed, you can try to rerun the file. The system should display a message asking you to choose a primary application to support PDX files. At this point we are looking for disk space where the application was installed in and we can link it with a PDX file. Since then, our operating system will use the selected program to support all PDX files.

Other issues

Despite the described problem with PDX there may be many more problems. If the existing operations were not effective, get involved with the following matters:

- verify that the PDX file is not damaged and that it has been downloaded or copied in whole
- verify that the file has a file extension that has not been intentionally changed (for example, if it do not contain other information than its extension suggests)
- make sure again whether the PDX file type is linked in the operating system with a proper program
- make sure that the file is not infected with a virus and you have up to date software and drivers.

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