Opening an STO File

The STO file type is primarily associated with OpenSim.

STO	File extension: STO
	File type:	3D model's keyframes and motion data

What is an STO file?

STO files mostly belong to OpenSim by Simbios. STO file extension is related to the storage format used by OpenSim, a biomechanics modeler, simulator, and analyzer. The STO file contains ASCII text representing rows, columns, and coordinates which are used to render 3D simulations of biomechanical activity. PRO100, a 3D interior design software developed by Ecru uses STO files to store interior design projects. STO file extension is also associated with "store" description files used by Inifinity Engine, a video game development kit which was used in creating games such as Baldur's Gate. STO "store" description files contain a general description of the stock (items), services, and the price of commodities which are available for sale in a store, tavern, inn, or temple within a game.

How to open an STO file

You need a suitable software like OpenSim to open an STO file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your STO file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a STO file directly in the browser:. Just drag the file onto this browser window and drop it.

Online STO Text Viewer

Choose your .sto file to analyze

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Online File Viewer

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Programs that open and convert STO files:

OpenSim by Simbios
See the previous paragraphs to learn more about the main application. STO files are often referred to as OpenSim 3d images because this type of file is primarily created or used by this software.
Baldur's Gate (store, tavern, or temple descripition) by BioWare
Baldur's Gate is a series of role-playing computer, mobile, and console video games developed using Infinity Engine. The STO file used by Baldur's Gate contains the list of items, prices, stock, and services available for sale in a store, temple, or tavern. This file format is classified as Game. Related links: STO File Format
PRO100 (3D design project) by Ecru
PRO100 is a 3D interior design software for modeling and visualizing the layout, furnishing, and publishing the interior designs of homes, offices and other indoor locations. The program stores design projects in STO files. This file format is classified as 3D Image.
Story Lite (template) by Geoff Davis
Story Lite is a lightweight text editor that uses multiple text areas within a document (referred to as stories) to create a "mind-map" that allows you to organize ideas and notes into different categories. Notes created with Story Lite are stored in STO files. This file format is classified as Data.
Ten Pak (Stub object) by Genus
Ten Pak is a discontinued software toolkit distributed as a CD containing utilities such as the drivers required by classic software. Ten Pak stored its Pascal object stub in an STO file. This program is no longer in use. This file format is classified as Developer.

STO file format:

Each file has a definite file format, that is, how the stored data is arranged in the file. The first characters in a file identify the file format, for example, HTML files start with the bytes <html>. However, different programs can use the same file extension, and file extensions can be assigned incorrectly. So a detailed analysis of a file is vital in order to determine the format and the associated program. Our evaluation of the STO files looks like this:

STO is a very common file type and includes different formats for different programs. The two most popular formats are as follows:

25% of all STO files have the same signature 03 00 00 00. The contents of these files cannot be read by a human; only a computer program can interpret the data. The file size is in the range of 920 bytes to 2 KB. The file type is relatively new. Files like these are about baseline, bathurst, monza, series, ilms, imsa, race and road, and usually contain person-related data.
20% of all STO files are PRO100 Furniture design project files. They consist of unreadable binary data. STO files are between 8 KB and 1 MB in size. Files like these are sometimes connected to kuchnia, diybed, bucatarie and projekt.

All other STO files (55%) have different formats, frequently e.g. Infinity Engine Store, JSON, STOCKHOLM, Model, Inverse, CERT, Muscle and Act. Tagged as force, model, daytona, atlanta, muscle, osracing or bline. If you want to find out what your STO file contains, drag and drop it onto this page.

Technical Data for STO File Extension

File classification:

3D Image

Related files:

_sto, -current-, mot, zip, stp, meb, sdb, st0, exe, st1, cci, im0, adx, bnk, stl, rar, jpg, bak

Mime type:

application/octet-stream, text/plain

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: DVTools.File
EXEFile: %ProgramFiles%\Pinnacle\DV500\DVTools\DVTools.exe %1

an sto 3D model's keyframes and motion data is a special file format by Simbios and should only be edited and saved with the appropriate software.

How to solve problems with STO files

Associate the STO file extension with the correct application.
Update your software that should actually open 3d model's keyframes and motion data files. Because only the current version supports the latest STO file format. Search, therefore, e.g. on the Simbios manufacturer website after an available OpenSim update.
To make sure that your STO file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .STO file online - secure, fast, and no downloads needed.