FDF File - opening and understanding
Did your computer fail to open a FDF file? We explain what they are used for and recommend software that we know can open or otherwise handle your .FDF files.
What is a FDF file?
The .fdf file extension refers to a specific document file that is related to Adobe. FDF files are document files that can be opened or created using Adobe Acrobat reader. FDF means "forms data format". It is a forms format specifically for .pdf files. FDF files are used for text files exported from .PDF files.
FDF files are fairly smaller than .pdf files because they mainly contain the forms field data and not the entire form. In other words, .fdf files only have the "contents" of the .pdf without the complete package. It is like a thought in your head without putting it in the paper. Some editorial managers in browsers use files with .fdf extension to ensure that the file opens in Adobe Reader and not within the browser. Only the Reader can open .fdf file, but the users can export it in .pdf.
FDF file format is now popularly used as an attachment in spam messages. If you receive an attachment in your email and the size is fairly small, opening it is not advisable and is considered impractical. Small FDF files are quite harmless, but are also useless. However, .fdf files that consume large memory size should be scanned first before prompting it to your Adobe Reader. You may resume downloading the .fdf file once you're done with the necessary security check. Converting the FDF file to PDF is also recommended to make the file more accessible.
How to open FDF files
You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension FDF for different purposes.
While we have not verified the apps ourselves yet, our users have suggested 10 different FDF openers which you will find listed below.
Suggest another file format using extension FDF
While we know of one file format using the .FDF file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .FDF file.
Various viewers for this file format
These apps are known to open certain types of FDF files. Remember, different programs may use FDF files for different purposes, so you may need to try out a few of them to be able to open your specific file.
 | Adobe Acrobat Reader | User submitted |
 | Adobe Acrobat | User submitted |
 | Foxit Reader | User submitted |
 | Adobe Acrobat DC | User submitted |
 | Nitro PDF Professional | User submitted |
 | Foxit PhantomPDF | User submitted |
 | Foxit Phantom | User submitted |
 | Foxit J-Reader Plus | User submitted |
 | Bluebeam Revu | User submitted |
 | Foxit J-Reader | User submitted |
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