What is an AFF file?
The .AFF file extension belongs to several entirely different file formats. The most common format is a Spell Checker Affix File. These files are used by Hunspell and other spell checking software. They contain grammatical rules for generating word variations and are normally paired with a .DIC dictionary file.
Another major format is the Advanced Forensics Format. This is an open-source disk image format created for digital forensics by Basis Technology. It stores both the raw disk data and the forensic metadata in a single file.
Additionally, the .AFF extension is used for electrical test certificates generated by Amtech or Megger software, legal document links from APIS Bulgaria, and rhythm charts for the game Arcaea.
How to open AFF files?
Because the .AFF extension has multiple possible meanings, double-clicking the file on your computer will often show an error. If the file is a text-based spelling file, you can open it with a code editor like Notepad++. If the file is a forensics disk image, you must use specialized data recovery or forensic software.
If your .AFF file is an electrical certificate, it might be a standard .ZIP archive in disguise. You can try opening it with archive software like 7-Zip.
Inspect and view AFF files online
Because .AFF has multiple possible meanings, we recommend using viewer.online/aff to identify the actual format of your file. viewer.online/aff can analyze .AFF files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available.
If you need to change your file into another format, we recommend converting it on convert.guru. Depending on the original format, you might be able to convert it to a .TXT document, a standard .ZIP archive, or an .ISO image.
Summary
viewer.online/aff is useful for identifying, inspecting, and understanding .AFF files without installing software or dealing with compatibility problems.