Protect PDF
Add password protection to your PDF document.
Drop a PDF file here or click to select
Max file size: 10.00 MB
Note: This adds basic protection metadata. For full AES-256 encryption, additional server configuration may be required.
How to Password Protect a PDF Online
- Upload the PDF you want to protect
- Enter and confirm your chosen password
- Click "Protect PDF" to encrypt the document
- Download your password-protected PDF
Why Password Protect a PDF?
Sensitive documents like contracts, financial reports, medical records, and legal papers should be locked with a password before sharing. Our tool adds encryption so only people with the password can open the file.
- Protect confidential business documents
- Secure personal information before emailing
- Standard PDF encryption accepted by all PDF readers
- Password required to open the file
- No Acrobat license needed
Features & Benefits
- Strong Encryption: Standard PDF encryption protects your document.
- Easy Setup: Enter a password and click Protect - done in seconds.
- Universal: Protected PDFs open in any PDF reader that supports passwords.
- Free: Lock PDFs at no cost and no registration.
- Private: We process and delete - your password is never stored.
- All Devices: Works on desktop and mobile browsers.
Frequently Asked Questions
How do I add a password to a PDF for free?
Upload your PDF, enter a password, click Protect. Download the encrypted file - free and instant.
Can I remove the password later?
You'll need the password to open the PDF first. Then use a PDF editor to remove the password.
What if I forget the password?
Encrypted PDFs cannot be opened without the password. Store it safely.
Is the encryption strong?
We use standard PDF encryption. For maximum security, use a long, unique password.