TxHelpdesk supports preview of following types of files as listed.

Image files:  PNB , JPG,  JPEG, TIFF, TIF. PNG, PSD

Audio files: MP3, WAV, MP4, M4A

Video files: MP4, M4V

Other files: XML, JSON, ZIP: will stay zipped upon upload.

Note : For files that are not supported, User can view the file by downloading the same.