The .jsf file extension is most commonly associated with the Adobe Fireworks graphic editing application. The JSF files contain batch script files used by the Fireworks program. These script files contain a sequence of program commands that are referenced by the software.
The .jsf file extension is also used for Java server files, Jahshaka scene files and Project64 joystick settings files.
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If you have additional information about the JSF file format or software that uses files with the JSF suffix, please do get in touch - we would love hearing from you.