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File Extensions

Browse file extensions by category or letter. Learn what each file type is used for and find software that can open, view, edit, or convert it.

6
Indexed file extensions

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Use this directory to look up file formats, understand what files are used for, and find compatible applications for Windows, macOS, Linux, mobile, and online tools.

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6 extensions
Audio Letter: S Clear all
.SESX

Adobe Audition Multitrack Session File

The SESX file extension is the proprietary project format used by Adobe Audition, a professional digital audio workstation (DAW). Intr…

Audio
.SF2

SoundFont 2

SoundFont 2 (SF2) is a widely recognized file format for storing musical instrument samples and synthesis parameters. Developed by E-m…

Audio
.SF3

SoundFont 3 Audio Bank

SoundFont 3 (SF3) is an open-source file format used for storing digital audio samples and MIDI instrument data. Developed primarily b…

Audio
.SFZ

SFZ Sample Definition File

The SFZ file format is a royalty-free, open-standard specification for defining the behavior of musical instrument samples within a so…

Audio
.SMF

Standard MIDI File

A Standard MIDI File (SMF) is a universal file format designed to store MIDI (Musical Instrument Digital Interface) data, which consis…

Audio
.ST0

Sony Digital Voice File

The ST0 file format is a proprietary audio format primarily associated with older Sony digital voice recorders. It is used to store co…

Audio

Frequently Asked Questions

Everything you need to know about file extensions

You can search by entering a file extension directly in the search bar or browse the directory by category or alphabetical index.

Each listing provides a definition of the file extension, common use cases, compatible software, supported platforms, and related or alternative formats.

The database is updated regularly to reflect new file extensions, changes in software compatibility, and evolving file format standards.