PDF tools that respect your privacy
QuackPDFTools was built on a simple idea: you shouldn't have to upload sensitive documents to a stranger's server just to merge two files.
Fast, free, and genuinely private
Most online PDF tools work by uploading your documents to their servers, processing them, then letting you download the result. That's a problem when your files contain contracts, medical records, or financial documents.
QuackPDFTools processes everything entirely inside your web browser using modern JavaScript libraries. Your files never travel over the internet — they go straight from your disk to your download folder.
We keep it free by showing tasteful ads. No subscriptions, no paywalls, no limits.
Try the toolsZero server uploads
Files are never sent over the network.
Instant processing
Uses your device's own CPU — no wait times.
Always free
All five tools, unlimited use, no sign-up.
Open standards
Built on well-maintained, open-source libraries.
How it works under the hood
QuackPDFTools is built with open-source browser libraries — no back-end required.
PDF-lib.js
Handles creating, merging, splitting and modifying PDF documents entirely in JavaScript.
PDF.js (Mozilla)
Renders PDF pages to HTML canvas elements for compression and PDF-to-image conversion.
JSZip
Packages multiple output files (split PDFs, images) into a single ZIP download in the browser.
Vanilla HTML/CSS/JS
No frameworks or build tools — just fast, lean, standards-compliant web code.
Cloudflare Pages
Served via Cloudflare's global CDN for fast load times from anywhere in the world.
Dark Mode + Responsive
Fully responsive layout with persistent dark mode toggle — works on any screen size.