Files with the steamstart extension can be generally found as temporary data files from the Steam Client developed by Valve.

Detailed description

Software that open steamstart file

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STEAMSTART file extension - Steam Client temporary data

What is steamstart file? How to open steamstart files?

File type specification:

Temporary file type icon Temporary file type

steamstart file icon: steamstart filetype icon

The steamstart file extension is associated with Steam Client by Valve.

Whenever a game installed in Steam is launched a temporary steamstart file is created for some DRM or internal purposes.

The default software associated to open steamstart file:

Steam icon

Valve Corporation logoSteam  Microsoft Windows software

Company or developer:
Valve Corporation

Steam is digital distribution and multiplayer platform. It is used to distribution of computer games, game updates and also has chat and in-game voices features.

Help how to open:

These files are not meant to be opened directly, they are generated for temporary purposes.

How to convert:

As far as we know, this .steamstart 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.

List of software applications associated to the .steamstart file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open steamstart file, edit steamstart file, convert steamstart file, view steamstart file, play steamstart file etc. (if exist software for corresponding action in's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting steamstart files.

Programs that can create steamstart file - Steam Client temporary data

Programs supporting the exension steamstart on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for create steamstart file action.

Microsoft Windows:

Apple macOS / Mac OS X:


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