GP4 File - opening and understanding
Did your computer fail to open a GP4 file? We explain what they are used for and recommend software that we know can open or otherwise handle your .GP4 files.
What is a GP4 file?
Files that contain the .gp4 file extension are used by a variety of fax software applications. The .gp4 file extension is used to save generic fax image files.
Prior to digital fax software products, users had to have a fax device to send and receive fax messages. Once the Internet evolved, software developers began creating digital fax products, allowing users to send and receive faxes using their computer and an Internet connection.
GP4 files are saved in the CCITT file format. This standardized Group 4 format stores 1-bit or bi-level images using lossless file compression. The GP4 file format is able to compress the fax files into smaller file sizes than older file format versions without losing image quality.
How to open GP4 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 GP4 for different purposes.
While we have not verified the apps ourselves yet, our users have suggested 10 different GP4 openers which you will find listed below.
Suggest another file format using extension GP4
While we know of one file format using the .GP4 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 .GP4 file.
Various viewers for this file format
These apps are known to open certain types of GP4 files. Remember, different programs may use GP4 files for different purposes, so you may need to try out a few of them to be able to open your specific file.
 | Guitar Pro | User submitted |
 | TuxGuitar | User submitted |
 | Altium Designer | User submitted |
 | MaxView Application | User submitted |
 | Go PlayAlong | User submitted |
 | Altium Designer Summer | User submitted |
 | Altium Designer Summer Viewer | User submitted |
 | Altium Designer Winter | User submitted |
 | Guitar Pro Lite | User submitted |
 | XnView | User submitted |
Not sure exactly what type of file you are trying to open? Try our new File Analyzer. It is a free tool that can identify more than 11,000 different kinds of files - most likely yours too! It will help you find software that can handle your specific type of file. Download File Analyzer here.