Password Protect PDF — free & private
Encrypt your PDF with a password. No upload, no sign-up.
Drop your PDF here or click to select
Your file stays on your device. Nothing is uploaded.
Loading...
How to password protect a PDF
Select your PDF file (it stays on your device). Type a strong password, and click the encrypt button. The tool immediately embeds your password into the PDF using AES encryption, rendering the document unreadable until the correct password is provided.
Why encrypt your PDFs?
- Confidential data — protect financial records, medical information, or legal contracts before emailing them.
- Prevent unauthorized access — ensure only intended recipients can open the document.
- Comply with regulations — many industries require encryption for sharing sensitive documents.
Frequently asked questions
How strong is the encryption?
We use industry-standard PDF encryption (AES). It is highly secure against brute-force attacks if you choose a strong password.
Can you recover my password if I forget it?
No. We process the file in your browser and never store your documents or passwords. If you lose the password, the PDF cannot be opened.
Is my PDF uploaded?
No. Everything happens entirely in your browser. Disconnect your internet after loading the page and it will still work!