Files with spg extension are associated with MOIRA software. They are used as some kind of text file.

There is one other file type using
the SPG file extension!

empty icon.spg - TCP Optimizer saved settings

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SPG file extension - MOIRA text file

What is spg file? How to open spg files?

File type specification:

Text file type icon Text file type

The spg file extension is also used by MOIRA, a program used within the UK rail industry. This program is owned by AEA Technology Rail. Most likely very specialized software.

Help how to open SPG files:

This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.

How to convert file with extension SPG:

As far as we know, this .spg file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.

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