Protect PDF with Password - Secure Your PDF Files Online
Add password encryption to secure your PDF files. Free online PDF protection tool with industry-standard security.
Use at least 12 characters with letters, numbers, and symbols
How to Password Protect PDF Files
Upload PDF
Click the upload area and select the PDF file you want to protect.
Set Password
Enter a strong password that will be required to open the PDF.
Download
Click "Protect PDF" and your encrypted file will download securely.
PDF Protection FAQs
How secure is PDF password protection?
Our tool uses industry-standard encryption to protect your PDFs. The security level depends on your password strength - use a strong, unique password for maximum protection.
What makes a strong password?
A strong password should be at least 12 characters long, include uppercase and lowercase letters, numbers, and special characters. Avoid common words or personal information.
Can I remove the password later?
Yes, if you know the password, you can use our Unlock PDF tool to remove password protection from your PDF.
What if I forget my password?
Unfortunately, if you forget your password, there is no way to recover it or access the protected PDF. Always store your passwords securely.
Does password protection work on all PDF readers?
Yes, password-protected PDFs are compatible with all major PDF readers including Adobe Acrobat, browsers, and mobile apps.
100% Secure
Files processed locally in your browser
Lightning Fast
Instant encryption with no waiting
Strong Encryption
Industry-standard security