TiffToPDF can directly convert tiff into PDF.

Supports virtually all TIFF compressions, including ZIP,LZW,CCITT G4/G3, JPEG, Packbits. Outstanding compression. Can combine multiple tiff files into one PDF file. Can merge and split single or multipage tiff files to pdf. Supports Multi-page tiff file to PDF conversion . Does NOT need Adobe Acrobat software . Supports sorting on file name when converting batches. Supports single and multiple file processing, single and multi-level folder processing, and more processing modes. Can set automatic skew-correction (of B/W images). Makes use of effective compression processing to minimize space occupied by the created PDF files. Password protection for PDF files with 40 or 128 bit encryption. Set file permissions to restrict printing, copying, and future modifications to the document. Specify any resolution(DPI) in the generated PDF file. Optimized to increase speed. Set the document info (title, subject, author and keywords, creator) . Append to existing PDFs. Support watermark,bookmark, viewer setting.