Adobe PDF documents are universally used in business, education and personal exchanges and the documents themselves can contain very rich graphics and diagrams.Īdobe Reader XI is the standard in PDF document viewing, yet it does lack in several areas. If you want full compatibility with all versions of PDF documents, then the only original PDF viewer is from the source and that is Adobe. The legacy free PDF reader from Adobe featuring cloud sharing, a few minor editing features, form compatibility and the option to print portable documents.