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What are PDF_ files and how to open them

Are you having problems opening a PDF_ file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your PDF_ files.

What is a PDF_ file?

PDF stands for Portable Document Format. Files that contain the .pdf file extension are older Adobe Acrobat files. The newer .pdf extension has replaced the older .pdf version.

The .pdf_ file extension used to be used when creating PDF documents on older Apple computers. PDF files allow documents to be transmitted over the Internet and viewed across multiple platforms, regardless of the application that the original document was created in.

The newer PDF documents that are created with recent versions of the software and with the versions created for Windows computers are saved with the .pdf file suffix rather than the .pdf_ file extension.

How to open PDF_ files

Important: Different programs may use files with the PDF_ file extension for different purposes, so unless you are sure which format your PDF_ file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested two different PDF_ openers which you will find listed below.

Last updated: January 19, 2020

Various apps that use files with this extension

These apps are known to open certain types of PDF_ files. Remember, different programs may use PDF_ files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Adobe AcrobatAdobe AcrobatUser submitted
PDF Complete Special EditionPDF Complete Special EditionUser submitted

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about PDF_ file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.