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.PDF File Format

Portable Document Format File Icon
File TypePortable Document Format File
DeveloperAdobe Systems
What Does It MeanPortable Document Format
Category Document Files
File Description

Portable Document Format, as indicated by its name, is a document standard independent of operating systems, software and hardware. The PDF file format was created by Adobe Systems in 1993. PDF files appear the same on the screen as printed on paper.

Adobe Acrobat is the original application to create and open PDF files. However, PDF files are usually created from another document instead of from scratch. They can contain text, images, forms, annotations, and other content. Google, Bing, and other search engines have added support for index PDF documents (e.g. use "filetype:pdf keyword" to find indexed PDF documents in Google), which can be viewed in a Web browser using the free Adobe Reader plug-in.

In the early years, PDF was mainly adopted by desktop publishing industry. Since then, A PDF file may be encrypted for security and authentication purpose. There are 2 different passwords - user password and owner password. The former controls opening, while the latter takes charge of restrictions such as printing, copying text, modifying text, etc. Nowadays the owner password is not secure. But if a PDF file has user password, it's hard to crack and any PDf opener requires it to read the PDF content. Therefore, DO remember your PDF owner password if you've set one.

How to Open .PDF Files
PDF file opener for Mac
Mac OS
Default .PDF file opener for Mac
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PDF file opener for Windows
Windows OS
Default .PDF file opener for Windows
app to open PDF file Internet Explorer, Chrome, Firefox, etc. info
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DOC File Opener Corel WordPerfect Office X5 Download
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PDF file opener for Linux
Linux OS
Default .PDF file opener for Linux
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PDF file opener for Android
Android OS
Default .PDF file opener for Android
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Apple iOS
Default .PDF file opener for iOS
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Other apps to open .PDF files
app to open PDF file Solid PDF Tools Download
Ideal free program to open PDF files
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PDF Programs
PDF Editor | PDF Creator | PDF Converter
PDF Topics

File Extensions

  • 1. How to rename PDF extension on Windows
  • 2. How to change PDF file extension on Mac

PDF Frequently Asked Questions

None.

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PDF File Recovery | PDF File Recovery for Mac
Source FileInfo.com - Official File Extension Library

File Opener Tips How to select a program to open PDF files?

When you double click PDF files on computer, the associated program will be launched to open the selected PDF file. But you can change it to any program at your pleasure.

a) Select a program to open PDF files on Windows

Right-click on the PDF file and go through 'Open with' > 'Choose default program'. In the pop-up windows, choose a program as the PDF file opener. If you decide to always open PDF files with the program, only check the option 'Always use the selected program to open this kind of file'.

Change the default program to open files

b) Select another application to open PDF files on Mac

First Get Info about any one of PDF files by right-clicking or Command-I, and click 'Open with' arrow to choose a program to start your PDF file. Click 'Change All' button to set the selected application as the default PDF file opener app.

Change the default program to open files on Mac

 
PDF File Recovery | PDF File Recovery for Mac
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