Protect PDF — Free, Private, No Limits
Drag & drop a file here, or tap to browse
No file size limit · Processed privately
Protect PDF adds password encryption to a PDF so only people who know the password can open it. This is useful for sending contracts, financial statements, or personal documents where you want an extra layer of security beyond email. Choose a strong password, and the encryption is applied locally in your browser — meaning the file and the password you set are never transmitted to any server. The protected PDF works with all standard PDF readers and will prompt for the password when opened.
How to use Protect PDF
- 1
Upload the PDF file you want to protect.
- 2
Enter and confirm a password.
- 3
Click "Protect PDF" to encrypt it locally.
- 4
Download your password-protected PDF.
Frequently asked questions
Standard PDF password encryption is applied, compatible with all major PDF readers.