PDF Optimizer

PDF/A Conversion

Optional. Enable this category by adding it to the profile and setting "enabled" equal to "on." This setting directs PDF Optimizer to save an optimized PDF document so that it is compliant with the PDF/A format. Other settings in this category allow you to control the conversion process.

PDF/A, or PDF Archive, is an ISO-standard version the PDF format. Adobe introduced PDF in 1993, and the International Organization for Standardization (ISO) took management of PDF as an open standard in 2008. ISO released PDF/A in 2005. PDF/A is designed to be used with PDF files that need to be archived and stored, and still capable of being opened and read in a viewing tool many years into the future. Hence the standards for PDF/A files differ from regular PDF documents. In one example, to be PDF/A compliant, the fonts in a PDF/A file must be embedded in the file itself so that a viewer does not need to try to access fonts stored in a font directory on a local machine.

enabled Enables conversion of the optimized PDF document to the PDF/A format.
type Select the type of PDF/A output to use for the target file:
1b Basic conformance with PDF/A archival standards
2b Basic conformance with archival standards but revised for later versions of the PDF format. PDF/A-2 includes options for OpenType fonts, layers, attachments (which themselves must be PDF/A compliant) and JPEG 2000 image compression.
2u Matches PDF/A-2b but also requires that all text in the document have Unicode mapping.
3b Matches PDF/A-2b, except that it is possible to embed any kind of file in the PDF document. With PDF/A-3 a user can save an XML, CSV, CAD, spreadsheet, or other type of file in the PDF document and still conform to PDF/A standards.  The file embedded in the PDF/A-3 does not need to be converted to PDF/A itself.
3u Matches PDF/A-3b, but also requires that all text in the document have Unicode mapping.
pdfa-target-color-space Select the target color space to use when converting the colors in the PDF document when converting it to PDF/A.
rgb red green blue
cmyk cyan magenta yellow black
Rasterize-if-errors-encountered When set to OFF, if PDF Optimizer finds errors when saving the optimized PDF document as PDF/A compliant, PDF Optimizer ends the conversion to PDF/A and displays error message.

When set to ON, if PDF Optimizer finds errors when converting a PDF document, it will rasterize the page with the problem into a graphic image and continue to save the document as a PDF/A document.