PDFlib TET PDF IFilter Releases

Released: Nov 19, 2021

Updates in 5.3 (maintenance release)


  • Added support for Microsoft Windows 11.

Released: May 4, 2021

Updates in 5.3


  • Optimized PDF resource handling to improve performance for documents with excessive numbers of images, patterns or other resources.
  • Security and performance updates of all third-party components.
  • Harden processing of damaged and illegal PDF documents by testing the full Issue Tracker PDF corpus with tens of thousands of stressful PDF files.
  • Expanded platform and CPU support including macOS on ARM64 and Linux on ARM64.
  • Timeout can be specified to limit processing time for large or...

Released: Jul 25, 2019

Updates in 5.2


  • Added support for SharePoint Server 2019.
  • Improved table detection with row and column span identification.
  • Mark Artifacts (irrelevant text and images) in TETML and the API.
  • Extract text and images from annotations and patterns.
  • Support for inline images and images in soft masks.
  • Security updates for third-party libraries.
  • Optionally retrieve Separation and DeviceN text colors in the simpler alternate color space instead of the rather complex native color space.

Released: Jun 1, 2017

Updates in 5.1


  • Text in bookmarks, annotations (comments) and form fields are now indexed by default.
  • Additional controls for indexing metadata properties.
  • Extended samples for custom metadata properties.
  • Streamlined output in the Windows event log.
  • Auxiliary tool for querying Windows metadata properties.
  • Additional predefined properties (XMP and PDF-based).


Released: Nov 9, 2015

Updates in this release

Updates in PDFlib TET 5

  • Retrieve fill and stroke color of text.
  • Improved page and table layout recognition.
  • Support vertical font metrics for CJK text.
  • Significantly enhanced merging of fragmented images.
  • Extract image masks and soft masks.
  • Merge and convert JPEG 2000-compressed images.
  • Preserve named spot colors in extracted TIFF images.
  • Honor layers and clipping paths.
  • Check whether an area on the page is empty, e.g. before placing a stamp or barcode.
  • TET's XML output called TETML includes...

Released: Aug 19, 2010

Updates in this release

Updates in V4.0

New features in PDFlib TET 4.0:

  • Performance enhancements: faster for many classes of documents
  • Higher speed and smaller memory consumption for very large documents up to hundreds of thousands of pages
  • Extract right-to-left and bidirectional text for Arabic, Hebrew, etc.
  • Unicode post-processing:
  • Foldings preserve, remove or replace characters
  • Decompositions replace a character with an equivalent sequence, e.g. replace narrow or vertical Japanese characters with their standard...