SNAGX format is the newest cross-platform format used in every version of Techsmith SnagIt screen-capturing software, be it for Windows, Mac, or mobile versions.
Export to JPEG is the natural and default option for exporting captured screen shots, and it is the natural option for the majority of users. You can easily export your .snagx files by using the File ► Export option that you can find in every version of the program. The default options are JPEG, PNG or GIF.
As far as we know, only SnagIt tools can open .snagx files, so there is really no alternative to this.
Updated: February 9, 2024