Only an installer package is available for download (see below), but it can easily be (Uni)extracted: all files will be found in the '{app}' folder at extract location. Regrettably, PDF Multitool isn't fully portable, as it saves some paths and window settings to the system registry at 'HKCU\Software\Bytescout\Bytescout PDF Multitool'.
http://bytescout.com/products/pdfmultitool/ wrote:PDF Multitool is a free utility with multiple functions to help to extract data from PDF, convert PDF to CSV, PDF To XML, PDF To XLS or XLSX, PDF to TIFF images, extract file attachments and much much more.
ByteScout PDF Multitool latest release installer (currently v6.20.2354) can be downloaded from http://bytescout.com/products/pdfmultitool/.