Bytescout PDF SDK

Full set of methods and properties (Bytescout.PDFnamespace) to create documents (completely new documents or using existing PDF documents) with ability to draw on the page of existing PDF document;
Font embedding Type1, TrueType) including Unicode support;
PNG, JPEG, TIFF, JBIG2, CCITT Fax images and image compression modes support;
Security options (document permissions) and 40 bit, 128 bit and 128 AES encryption support;
Built-in EMF to PDF conversion engine including support for EMF images produced by virtual EMF printers;
Support for changing security settings of existing PDF documents (you can also remove protection);
Ability to handle produced PDF document in memory without need for temporary files and provide on-the-fly generation directly into memory stream (requires additional Web License);
Ability to split, merge, extract pages from PDF document and append to an another document using pages manager class;