While searching for an answer to the question - How to open the ARFF file? - you probably found websites, which offer software that was able to open any file extension. Do not be fooled, there is no one program that will allow you to work with any file extension, including the ARFF file. Each program contains a different type of data and you need specialized software to properly work with the ARFF file. Here is a list of programs that are designed to work with the ARFF file - remember, these applications are able to open at most a few file extensions, they are designed to work with a specific data type.
| File type | Weka Attribute-relation Format |
| Developer | University of Waikato |
| Popularity | |
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If after installing the program from a list, you still cannot open a file with the ARFF extension, the reason may be that the file is damaged. The solution may be to find a new copy of the ARFF file you want to open
In this case, the easiest way is to use the tool built into the operating system for association of the ARFF file with applications to support it. Double click on the file you cannot open - the operating system will display a list of programs that are likely to work with your ARFF file. Choose one of them, or select the location on a disk where you installed one of the applications from our list. Windows should then open the ARFF file using the program installed earlier.
Entries containing links of the ARFF file extensions with applications is located in the HKEY_CLASSES_ROOT. If you do not know how to get to the Windows Registry, or how to make changes in it, ask a specialist for help. Lack of knowledge on the subject may cause irreversible changes on your computer.
There may be a situation when a computer virus passes itself off as the ARFF file. In this case, such a file will definitely not be opened. Download a good antivirus program and scan the ARFF file mentioned. If the antivirus application detects malicious data, it may signify that the ARFF file is infected.
| ARJ | ARJ Compressed Archive Format |
| ARZ | MySQL Archive Storage Engine Data |
| ARPACK | ArtRage Package |
| ARB | Alphacam Router VB Macro |
| ARCINFO | ArcInfo Info |
| ARMA2OAPROFILE | ArmA 2 Settings |
| ARC | ARC Lossless Data Compression And Archive Format |
| ARE | BioWare Aurora Engine Area |
| ARENA | Quake 3 Id Tech 3 Game Engine Arena Settings Format |
| ARTF | Adobe FreeHand Xtra |
