Learn the Ins and Outs of PDFs
We are here to help you become a PDF expert. We want to provide you with the tools and skills you need to tackle PDF-related tasks with confidence and ease.
Announcements
Maximize Efficiency with Advanced Document Conversion: Streamline Your Enterprise Workflow
Tech corner
What is PDF compression and optimization?
Most people agree that PDF compression and optimization have something to do with reducing file size. Sometimes it's about faster rendering. Anyway, compression and optimization is a wide topic and it's certainly worth a ...
Product updates
Pdftools SDKs and Shell components development
We have also been diligently developing our current product line. This year with a special focus on simplifying integration and supporting new standards. The following innovations are particularly noteworthy.
Tech corner
Splitting and merging pages of PDF documents
Single out pages from a number of input documents and re-arrange them in a set of output documents belongs to the daily routine in a document assembly application. At first glance, this seems to be a clear and understand ...
Product updates
PDF Toolbox SDK
As we approach the beginning of the second quarter of 2021, we would like to share our most recent product update, concerning PDF manipulation for mass-editing and mass-creation of PDF/A-compliant documents. One of our c ...
Tech corner
Why is the extraction of text from a PDF document such a hassle
When I use a text editing tool such as Microsoft Word then it is quite natural that I can select a portion of text and copy it to the clipboard and paste it in to a window of any other tool. Not so with PDF. At least not ...
Product updates
Try PDF Web Viewer now for free and unlimited time
You can now conveniently test our 4-Heights® PDF Web Viewer and the underlying PDF Viewing SDK without a license key and for unlimited time. You can obtain the software package via both our website and npmjs.com. On "My ...
Tech corner
Embedding fonts in PDF
I collect bad PDFs since the Reference Manual 1.0 was published in 1993 and today I have recourse to a data base of more than 100'000 real world PDF files with all kinds of faults in them. The vast majority of problems, ...
Product updates
Form Filling and Stamping in the PDF Web Viewer
Earlier this year we have launched our brand new 4-Heights® PDF Web Viewer, the successor of the 3-Heights® PDF Web Viewer. Now we are proud to announce the arrival of two new features: PDF page stamps and form field fil ...
Tech corner
TIFF Mixed Raster Content (MRC) conforming to RFC 2301
Mixed Raster Content (MRC) is a process to reduce the size of raster images. It is well known since PDF/A is used to archive scanned documents. However, it has been used and standardized in RFC 2301 for TIFF files earlie ...
Product updates
All new from the inside: The PDF Web Viewer
Recent years have seen a tremendous increase in the use of web browsers as a new standard client platform, being available on almost any device and any operating system. Three years ago, we have responded to the need of ...
Tech corner
Stroking geometric paths - not as easy as it seems
In PDF geometric paths are simply described as lines and cubic bézier curves. The filling of a path is straight forward once one understands the even-odd and non-zero-winding rule. The stroking of a path however is not a ...