PDFi: Low-level PDF inspector and editor

PDFi is a simple tool for displaying the low-level structure of a PDF file in an interactive tree view. Arbitrary values can be modified or deleted. The motivation for PDFi is to allow modifying a PDF file in a precise, minimally invasive way; for example, to remove a portion of text or a watermark, without affecting the rest of the PDF file. Most naïve approaches to doing this involve converting…