PDFlib PLOP is a versatile tool for linearizing, optimizing, repairing, analyzing, encrypting and decrypting PDF documents.

PDFlib PLOP DS additionally offers the ability to apply digital signatures to PDF documents. PLOP DS 5 applies digital signatures to PDF documents according to the latest standards and technologies:


Signatures enabled for Long-Term Validation (LTV)

All certificates embedded for validation without any prior configuration

Time-stamped signatures and document-level time-stamps

PDF/A, PDF/UA, PDF/X and PDF/VT conformance

Software and hardware certificates, e.g. smartcards or USB tokens

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PDFlib TET 5 and TET PDF IFilter 5 available

PDFlib TET (Text and Image Extraction Toolkit) reliably extracts text, images, metadata, and other elements from PDF documents.


TET PDF IFilter extracts text and metadata from PDF documents and makes it available to search and retrieval software on Windows.


TET 5 provides many significant functional enhancements, such as:


Text retrieval: retrieving fill and stroke color of text, improved layout detection

Image retrieval: significantly enhanced merging of fragmented images, extracting of image masks and soft masks

Page processing: honor layers and clipping paths

TETML content: including fill and stroke color of glyphs, color space and ICC profile details

several new pCOS pseudo-objects


Try our free TET Plugin that provides easy access to PDFlib TET. It is a powerful replacement for Acrobat’s built-in text and image extraction tools, with a number of convenient user interface features.

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pCOS Cookbook

The PDFlib pCOS Cookbook is a collection of pCOS coding fragments for retrieving all kinds of information from PDF documents. 



German ZUGFeRD Format for Invoices

PDFlib 9 supports the PDF/A-1/2/3 standards and can be used to implement the ZUGFeRD format. 


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PDFlib Cookbook


The PDFlib Cookbook is a collection of PDFlib coding fragments for solving specific problems. The Cookbook topics help you develop solutions based on the PDFlib product family. You can browse Java code, PHP code and PDF output for all Cookbook topics, or download a package with all code samples along with auxiliary input data.