Password protect PDF free
Encrypt your PDF with a password so only people with the password can open it. AES encryption applied right in your browser.
Drop a file here, or browse
Processed in your browser — nothing is uploaded.
🔒 100% free · your files never leave your browser
Use this free tool to password protect PDF documents. Add a password so only people who know it can open the file — ideal for contracts, statements and anything confidential.
NeuroScans encrypts your PDF in the browser, so the file and password are never uploaded. It’s a free, private way to password protect PDF files with no sign-up.
How to Protect PDF
- Upload the PDF you want to protect.
- Enter a strong password.
- Click “Protect PDF”.
- Download the encrypted, password-protected PDF.
Why use NeuroScans Protect PDF?
- Encrypt your PDF with a password using AES encryption.
- Only people with the password can open the file.
- Ideal for contracts, statements and private records.
- No upload — file and password stay in your browser.
- Completely free with no sign-up.
When to use this tool
Password-protecting a PDF is important before emailing bank statements, sharing legal documents, or storing sensitive records. The encryption is applied on your device, so your file and password are never exposed to a server.
Frequently asked questions
How do I password protect a PDF for free?
Upload your PDF, type a password, and click “Protect PDF”. The encrypted file downloads instantly and will ask for the password whenever someone opens it.
What encryption is used to protect the PDF?
The PDF is encrypted with standard PDF AES encryption, so it cannot be opened without the correct password.
Is my password or file uploaded?
No. Encryption happens entirely in your browser, so neither your PDF nor your password ever leaves your device.
What happens if I forget the PDF password?
For security there is no recovery — without the password the PDF cannot be opened. Store your password somewhere safe before sharing the file.