Files with the .fop extension are data files used by the InfoZoom software. They contain protected data for internal use. The .fop files are not meant to be viewed or manually opened by users.
You cannot access .fop files if InfoZoom is not installed on your system. Update InfoZoom to the latest version. Updated software may support more modern file formats. This can allow .fop files to be opened. Previous InfoZoom versions could likely open the .fop files just fine.
Thousands of users have this problem daily. Here are tips to open .fop files and programs that support them. The .fop format and InfoZoom were developed by humanIT. Work with .fop files using tools like fop file openers, converters, viewers and editors.
The .fop file extension is similar to .fox files. But .fop files are protected when used in InfoZoom. They contain data for internal use. The .fop extension is not meant to be opened manually. It is not a convertible file format.
When you double-click a .fop file, Windows checks the extension. If Windows recognizes the extension, it opens the file with associated software. If not, you receive a message to select an app for the .fop file. Windows does not have a default program for the extension.
You can also associate the .fop extension with software in the Registry. Many unknown file types contain simple text data.
Apache FOP
Oxygen XML Editor