medium
webdev•May 29, 2026
Building a Browser-Based PDF Page Numbering Tool with JavaScript
In this tutorial, you'll build a browser-based PDF page numbering tool using JavaScript and the PDF-lib library. Users will be able to upload a PDF, choose where page numbers appear, customize formatting options, preview the document, and download the updated PDF without uploading files to a server.
freecodecamp
Original source
Key summary
Learn how to build a browser-based PDF page numbering tool using JavaScript and the PDF-lib library. This tutorial covers project setup, library selection, upload interface creation, PDF page reading, previewing, and downloading the updated PDF.
TL;DR
- Build a browser-based PDF page numbering tool using JavaScript
- Use the PDF-lib library for local PDF processing
- Create a simple upload interface for PDF files
- Read and modify PDF pages using JavaScript
- Customize page number formatting and style
- Preview and download the updated PDF directly from the browser
This content is automatically summarized using AI. For full context, always refer to the original article.
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