Protect PDF

Add a password to your PDF so it only opens for people who know that password. The encryption happens in your browser, so your file is never sent to a server.

Click to select PDF or drag and drop

Your file stays private - processed in your browser

Up to 20MB · No upload — processed on your device

How to Protect PDF

  1. 1. Upload your PDF file
  2. 2. Enter a strong password and confirm it
  3. 3. Optionally restrict printing or copying
  4. 4. Click "Protect PDF" and download your secured file

Features

🔐 Password Protection

Add strong password protection to prevent unauthorized access.

🚫 Restrict Actions

Control printing and copying permissions for added security.

🔒 100% Private

All processing happens locally. Your files never leave your device.

⚡ Instant Processing

Protect your PDFs instantly without uploading to servers.

Frequently Asked Questions

Is my file uploaded, and what is the maximum file size?

No upload is needed. This tool runs entirely inside your browser, so your file is never sent to a server. Files of up to 20MB are supported and processed locally on your own device.

How do I password protect a PDF?

Upload the file, type a password and download it. The password is then required to open the document.

What encryption is used?

Standard PDF security with 128-bit RC4, the same widely supported scheme used by Adobe Acrobat.

Is the password stored anywhere?

No. It is applied inside your browser and never leaves your device.

Are my files uploaded?

No. The file is processed by JavaScript inside your own browser, so it is never uploaded to a server.