Your files never leave your device

Handle your PDF tasks in your browser

Merge, split, rotate, delete pages, convert to and from images. No installation, no upload, completely free.

Free PDF tools

Why PDF Toolbox?

🔒

100% private

All processing happens in your browser; no file is sent to a server.

Fast & no setup

No app to download, no sign-up, no payment.

♾️

Unlimited

No file size or daily usage limits.

📱

Every device

Works smoothly on desktop, tablet and phone.

Android app

Prefer an app on your phone?

Our free Android app does everything here fully offline — your files never leave the device — plus extras the website can't do: draw and write on PDFs, lock them with a password, and sign with your finger.

  • ✏️ Annotate — write, draw and highlight on any PDF
  • 🔒 Password-protect PDFs with AES encryption
  • ✍️ Sign with your finger, 100% on your device

🚫 No annoying ads — just one small banner, no pop-ups and no full-screen interruptions.

GET IT ONGoogle Play

Frequently asked questions

Are these PDF tools really free?

Yes — every tool is free, with no signup, no watermarks added to your files and no daily limits.

Are my files uploaded to a server?

The browser tools (merge, split, compress, watermark, sign and more) process files entirely on your device — nothing is uploaded. Only the Office conversions use a conversion server, and those files are deleted immediately after converting.

Do I need to install anything?

No — everything runs in your web browser. There is no app to download and no account to create.

Does it work on phones and tablets?

Yes — the tools work in mobile browsers on Android and iOS as well as on desktop.