What is a SFS file?
A .SFS file is an extension used by multiple unrelated software programs. The most common use is a SquashFS compressed filesystem image used by the Linux kernel. Another frequent use is for video game saves. This includes the Kerbal Space Program Save File created by Squad, and save files for Starfield by Bethesda Game Studios. It is also used as a game data archive by Maddox Games, a generated sound effect file by sfxr, and a database backup by SFirm.
How to open SFS files?
Because .SFS has multiple possible meanings, we recommend using viewer.online/sfs to identify the actual format of your file. viewer.online/sfs analyzes .SFS files to identify their exact format and creator software, shows which programs can open the file, and usually previews it.
Software and tools
To work with these files locally, your tools will depend on the exact file type. You can mount or extract SquashFS files on Linux using the `unsquashfs` command-line tool, or open them on Windows using 7-Zip. Game saves usually require the original video game to load properly. However, because Kerbal Space Program save files are structured text data, you can read and edit them manually using standard code editors like Notepad++.
Summary
viewer.online/sfs directly opens and previews .SFS files in the browser, eliminating the need to install software or troubleshoot compatibility issues.