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How It Works

Your files never leave your device.

Client-Side Processing

Every tool on this site processes your PDF files entirely inside your web browser. When you upload a file, it is read into your browser's memory — it is never sent to a server, uploaded to the internet, or stored anywhere outside your device.

No Data Leaves Your Device

  • Files are processed using JavaScript running in your browser
  • No file data is transmitted over the network
  • No analytics, tracking, or telemetry is collected
  • No cookies are used
  • The server only delivers the web application code — it never sees your files

How It Works

1

You open this site in your browser. The web app (HTML, CSS, JavaScript) is downloaded once.

2

You select a PDF file from your device. The file is read into browser memory only.

3

The tool processes your PDF using open-source libraries running locally in the browser.

4

The result is saved directly back to your device. No server interaction occurs.

Installable App

This tool can be installed as a Progressive Web App (PWA) from your browser. Once installed, it works even if the internal server is temporarily unavailable, as all the application code is cached on your device.

Open-Source Libraries

This tool is built entirely with open-source software:

  • pdf-lib — PDF creation and manipulation
  • PDF.js (Mozilla) — PDF page rendering
  • JSZip — ZIP file creation for split downloads
  • signature_pad — Signature drawing capture
  • Next.js & React — Application framework
  • Tailwind CSS — Styling