PDFCart

Password Protect a PDF

Lock a PDF with a password so only people you share it with can open it. PDFCart uses AES-256, the strongest encryption the PDF format supports.

Processed in your browser — files never leave your device

How to protect pdf

  1. Select or drop the PDF you want to protect.
  2. Type a password and repeat it.
  3. Click “Protect PDF” and download your encrypted file.

Frequently asked questions

How secure is the encryption?

Files are encrypted with AES-256, the strongest standard encryption available for PDFs, supported by Adobe Acrobat and all modern viewers.

Do you see or store my password?

No. Encryption happens entirely in your browser; neither the file nor the password is sent anywhere.

What if I forget the password?

There is no way to recover it, so keep the password somewhere safe or keep an unprotected copy.

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