Built a privacy-first PDF tool suite using PDF.js - client-side only, no uploads

[iqbalhssn78]

Hi PDF.js community,

Sharing a real-world production implementation using PDF.js (pdfjs-dist) for client-side PDF text extraction and rendering.

What we built: ihaveatoolforthat.com - a suite of browser-based PDF and file tools that process everything locally with no uploads.

How PDF.js is used:

• pdfjs-dist powers PDF rendering and text extraction across our PDF tools
• It runs inside a dedicated Web Worker thread - so PDF parsing is isolated from the main thread and never touches a network socket
• Used by: Extract Text from PDF, Extract Images from PDF, and all PDF-to-image conversion tools

Why we chose PDF.js:
The privacy constraint was architectural - we needed PDF processing that could run entirely client-side with zero server involvement. PDF.js made that possible at scale.

Technical implementation writeup: https://ihaveatoolforthat.com/privacy-guarantee (covers the full in-browser pipeline: FileReader ? ArrayBuffer ? PDF.js Worker ? output ? Blob ? download)

Happy to share specific integration details if useful for the community. Also using pdf-lib alongside PDF.js for PDF creation/modification - the two complement each other well for full client-side PDF workflows.