Protect PDF Online

Encrypt your PDF documents with secure passwords

How to Protect PDF Files Online

  1. 1Upload one or multiple PDF files
  2. 2Set a secure password for each PDF file
  3. 3Click "Protect PDFs" to encrypt your files
  4. 4Download your protected PDF

🔒 100% Secure: Encryption happens locally in your browser. We never see your password or files.

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Frequently Asked Questions

Common questions about PDF protection

Upload your PDF, enter your desired password in the "Password" field, confirm it, and click "Protect PDF".
Yes! We use standard PDF encryption. The process runs entirely in your browser, so we never see your files or your passwords.
Yes, you can upload multiple files and set a unique password for each, or sync the same password to all files.
You should first unlock the PDF using our Unlock PDF tool (if you know the password), and then protect it again with a new password.