Adding Page Numbers to PDFs: A Visual Canvas-Based Approach

Introduction Page numbers are essential for document navigation, especially in multi-page PDFs. Whether you're preparing a report, thesis, or presentation, properly positioned page numbers improve readability and professionalism. In this article, we'll explore how to build a pure browser-side PDF page numbering tool with an intuitive visual interface that lets users draw exactly where they want page numbers to appear. Why Browser-Side Page Numbering? Traditional PDF tools often require server uploads or complex desktop software: Privacy Concerns: Documents uploaded to external servers Complex Interfaces: Desktop software with steep learning curves Limited Control: Predefined positions that may not match your layout Network Dependencies: Requires internet for processing Browser-side visual positioning solves these issues: Documents stay on your device Intuitive click-and-drag interface Precise visual placement Works offline after loading Architecture Overview Our implementation combines