Reader is a free PDF Viewer, TIFF Viewer and CSF (content sealed format) Viewer. View and print TIFF, PDF and CSF files. Brava! Reader opens files quickly without startup delay and runs either as a desktop application or as an ActiveX with IE. TIFF imaging supports, monochrome (fax) and color, multi-page and oversize high resolution images. CSF files are persistent rights protected published files created by the free Net-It Now.