PDFMason, the PDF toolbox that keeps files in the browser

Field notes

PDFMason separates whole-page operations from editing the text objects already embedded in a PDF. Its browser tools handle tasks such as page extraction, rotation, image conversion, signatures, numbering, and watermarking, while the page attributes deeper text replacement to an Android app that reshapes fonts and embeds subsets. The site says its Content-Security-Policy blocks outbound connections and recommends checking the browser’s Network panel while using a tool. Password-protected PDFs are not supported.