Protect PDF

Lock a PDF with a password before you send it. The encryption happens on your device, so the file is never uploaded.

  • Free
  • Password
  • No sign-up
  • No upload

or drop a PDF file here

One PDF file

Private: your PDF is processed in your browser and never uploaded.

How to password-protect a PDF

  1. 1

    Add your PDF

    Choose or drop the file.

  2. 2

    Set a password

    Type the password the recipient will need to open it.

  3. 3

    Download

    Click “Protect PDF” – share the password separately.

Why protect PDFs here?

  • Strong encryption

    The PDF is encrypted, so it cannot be opened without the password.

  • 100% private

    Your PDF is processed in your browser and never uploaded – safe for contracts, invoices and ID documents.

  • Free, no limits

    No account, no watermark, no daily limit and no file size cap.

  • Works on any device

    Windows, Mac, Linux, iPhone or Android – nothing to install.

Popular uses

  • Sending payslips
  • Sharing tax returns
  • Medical records
  • Contracts by e-mail
  • Client reports
  • Private scans

Frequently asked questions

How do I put a password on a PDF?

Add the PDF, type a password and click “Protect PDF”. Anyone opening the file will be asked for it.

What if I forget the password?

It cannot be recovered – the password is never stored anywhere. Keep a copy of the original.

Are my files uploaded?

No. Everything runs in your browser; your PDF never leaves your device.

Is it free?

Yes. No sign-up, no watermark and no limit on the number or size of files.