Davcik/HTD-Analyzer: The Hidden Text Detector

Hidden Text Detector (HTD) is a Windows application designed to identify and reveal concealed text in PDF, Word, and Excel documents. This tool is essential for document analysis, compliance verification, and security auditing. The application detects hidden content using advanced heuristics, including microfonts (under 4pt), white or near-white text, and documents with hidden text attributes. This helps users uncover potentially concealed information that may not be immediately visible. Disclaimer: The code presented here is intended for an Install app, and it is stored on my personal Git. However, Windows security will probably block its execution. The downloadable ZIP file is available at https://zenodo.org/records/18217095 (DOI: 10.5281/zenodo.18217095). Unzip the folder and activate “HTD Analyzer.exe”. I have also attached a simple PDF file, “Test_document.pdf”, which identifies white text and 0,9 font. Version 1.0.0.