Portable Document Format (PDF) is a file format used to present documents in a manner independent of application software, hardware, and operating systems.

PDF

How to Compare PDF files

Asking how to compare PDF files is a frequent question on the PDF forums. It is important to understand what you are trying to...
Mark Stephens
1 min read

Useful PDF tools – pdfedit

10th February 2022 – We have added a new article on the free RUPS viewer, which may be more relevant now. Read our updated...
Mark Stephens
1 min read

How to find out if a PDF file has…

Because it turned out that people wanted to make PDF files accessible and extract content from PDF documents (and not just view them), Adobe...
Mark Stephens
51 sec read

Why PDF to HTML conversion does not work very…

When people convert PDF files into HTML files, they tend to be disappointed with the results. The main reason for this tends to be...
Mark Stephens
1 min read

How do I find the PDF version used (Tutorial)

There have been several revisions of the PDF file specification, each backward compatible but adding new features. For example, the PDF format version 1.6...
Mark Stephens
1 min read

How does color work in PDF files?

Color is a complex topic in PDF. This article helps to explain how it works. How to define Color in PDF files Color can...
Mark Stephens
1 min read