Once a PDF has been digitally signed, it is usually impossible to edit without compromising the signature. And it’s precisely the purpose of an electronic signature not to be able to tamper with a si Explore more
Last October, the PDF Association held a series of webinars about various aspects of the PDF format. Our technical presentations covered PDF/A conversion and validation and the growing low code/no co Explore more
Hi Everyone! We’re happy to announce our new PDF/A validator, available with the latest release. Why is it important to validate PDF/A files? Long term archiving is a critical requirement for many in Explore more
Communicating ideas in digital documents can often be made much clearer through the use of layers. Layers have been supported in PDF documents since version 1.5 through optional content groups (OCGs), Explore more
Previously in our PDF Optimization In-depth Series: 1. Introduction to the Optimization of Existing PDF files: Methods 2. Lossless Methods: Optimization of Document Content 3. Lossless Methods: Compr Explore more
Previously in the PDf Optimization In-depth Series. 1. Introduction to the Optimization of Existing PDF files: Methods 2. Lossless Methods: Optimization of Document Content 3. Lossless Methods: Compr Explore more