STO File Type

- The quick facts

What are STO files and how to open them

Are you having problems opening a STO file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a STO file?

STO files have multiple uses, and Infinity Engine Store is one of them.

Infinity Engine Store

We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

How to open STO files

Important: Different programs may use files with the STO file extension for different purposes, so unless you are sure which format your STO file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested 10 different STO openers which you will find listed below.

Last updated: July 13, 2020

More file formats using the STO extension

Through our research of STO files, we know that the following formats exist. However, we have not yet analyzed them in detail.

  • PRO100 Furniture Design Project

Various apps that use files with this extension

These apps are known to open certain types of STO files. Remember, different programs may use STO files for different purposes, so you may need to try out a few of them to be able to open your specific file.

PRO100PRO100User submitted
Shredder ClassicShredder ClassicUser submitted
MAP DesignerMAP DesignerUser submitted
AXPrint22AXPrint22User submitted
Unipro UGENEUnipro UGENEUser submitted
StoreStoreUser submitted
Deep Shredder UCIDeep Shredder UCIUser submitted
TOPTOPUser submitted
Shredder Classic ctShredder Classic ctUser submitted
Infinty Engine Editor ProInfinty Engine Editor ProUser submitted

Help us help others helps thousands of users every day, and we would love to hear from you if you have additional information about STO file formats, example files, or compatible programs. Please use the links below or email us at to discuss further.