How to Read Unknown File Extensions. A file extensions is a suffix to the filename that's used to indicate what software or program it's associated with. If the required software to read the file ...

We show you how to open files with no extension in Windows 11/10. You can try these tricks or use one of these free software or online tools.

Open the file with OpenWith Another great website to tinker with while dealing with cagey files is OpenWith.org. Open With too has a large database and probably knows about the extension you are ...

Tips Never open any file or attachment from an unknown or untrusted source. Such files may contain viruses or other malicious code.

To open Hierarchical Annotation Tables or .HAT files on Windows PC, you can use one of these Text Editors or free online tool called HAT Viewer.

There were hundreds of images on the archive and most of them displayed “could not open file because an unknown or invalid JPEG marker type was found".