PDF knowledge
Find articles that provide you with practical insight into the world of PDFs. Learn all the ins and outs of PDFs, from the fundamentals to the best practices.
Why Your PDF/A Files Keep Failing Audits
Picture the archive at an insurance company, where employees have been generating PDF/A files for years…but may have never validated a single one of them. The metadata in the files says they’re PDF/A compliant. The audit ...
How to get started with the Conversion Service using Postman
Postman is a free-to-download tool for making HTTP requests. It can be used for testing and getting acquainted with any REST API such as the one offered by the 4-Heights® Conversion Service.
How to fix your exception queue with document normalization
How keeping humans in the loop improves AI redaction
Is document processing your data sovereignty blind spot?
PDF data extraction: from unstructured files to scalable workflows
What is PDF/UA and why it matters for PDF accessibility
How to fix your claims pipeline with structured key-value extraction
Mastering Document Archival: using PDF Tools' Conversion Service to transform Word and other Desktop Apps to PDF/A
PDF SDKs: Open Source vs. Proprietary | Guide Part 1
PDF SDKs: Open Source vs. Proprietary | Guide Part 2
Getting started with PDF SDK | Quickstart Guide
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 ...
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 ...