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.

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Electronic Signatures – A Crash Course

What is a reliable way to digitally sign documents? In this article, we'll explain the differences between electronic signatures and digital signatures, explore the types of signatures used in practice, and discuss the b ...

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Die Vorteile von PDF/A-3 in der Praxis

PDF ist ein weit verbreitetes digitales Dokumentenformat für den sicheren und einfachen Zugang zu Dokumenten. Die neueste Version des Formats, PDF/A-3, bietet den zusätzlichen Vorteil, dass Dateien jedes Formats, einschl ...

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Importing images into a PDF file - a seemingly trivial task

A picture is worth a thousand words. That's why they are fondly embedded in PDF files. One would expect that embedding images in a PDF file is a simple task. Because it seems so easy, there are also many, including free, ...

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The versatility of a PDF viewer

Almost every user knows: a PDF viewer is not just a display tool for a well known document format. It provides many more functions, runs on many platforms, offers interfaces in many technologies and serves as an importan ...

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The caveats of assembling PDF/A documents

Assembling PDF documents from various sources is a crucial part of an output management system. And, as the document needs to be archived in most cases, it should conform to the PDF/A standard. But, is there a way to ass ...

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Digging for information by extracting data from a PDF document

Extracting text from a PDF document is one of the most popular information retrieval function. But how about other information such as images, metadata and more? It can be simple - but also tricky.

Product updates

E-Mail-Anbindungen für den Conversion Service

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How to convert signed documents to PDF/A?

I often get the question whether it is possible to convert digitally signed documents to PDF/A. Because there's no short answer to this I thought it would be helpful to explore the topic a bit into more detail. What tec ...

Product updates

Neuer Workflow im Conversion Service: “Archive PDF/A-1”

Zu den beiden bestehenden Archivworkflows im 4-Heights® Conversion Service gesellt sich nun ein dritter: Archive PDF/A-1. Dieser Workflow wurde speziell für Kunden entwickelt, die zum Beispiel aus rechtlichen Gründen ver ...

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Font subsetting - how it works and when to use

In order to reduce the file size PDF producers use a technique called font subsetting. What does exactly happen with the fonts and what are the consequences?

Product updates

Mit Web Client wird Conversion Service testen jetzt noch einfacher

Wir haben für Sie das Testen und Evaluieren des 4-Heights® Conversion Service noch einfacher gemacht – mit einem Web Client. Nun haben Sie die Möglichkeit, den GUI Client des Conversion Service ganz bequem in Ihrem Brows ...

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Digital signatures in PDF/A

Digital signatures are still not very widely used and the the knowledge about them is often fuzzy. This article tries to give an overview about this huge and complex topic.


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