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The Technologies Behind Stirling PDF

Stirling PDF harnesses several technologies throughout.


As part of the JAVA framework to host the WebUI itself we use Spring Boot, Thymeleaf and PDFBox. Apache PDFBox is the core of the PDF functionality within Stirling-PDF. They offer a vaierty of methods to edit PDFs which we have then build Stirling-PDF on.


  • PDF.js
  • PDF-LIB.js


We also use other open source applications along side ours to offer additional functionality.

  • LibreOffice Is used for conversions
  • OcrMyPdf used for OCR (Optical CHaracter recognition) To change PDF images into text
  • GhostScript, Bundled with OCRmyPDF, this is used to compress PDF documents.