Password Protect PDF
Encrypt PDFs with password protection
Password Protect PDF
Drag & drop PDFs or click to browse
PDF files only • Max 500MB • Multiple files supported
How to Use Protect PDF
- 1 Upload the PDF you want to protect
- 2 Enter a strong password
- 3 Choose encryption level (128-bit or 256-bit)
- 4 Optionally set permissions (printing, editing, copying)
- 5 Download your password-protected PDF
What You Get
Military-grade 256-bit AES encryption for PDF files. Set user passwords and granular permissions. Compatible with all major PDF readers.
Input: Confidential_Report.pdf
Output: Password-protected document requiring authentication
Input: Contract.pdf
Output: Encrypted PDF with print-only permissions
Input: Sensitive_Data.pdf
Output: 256-bit encrypted file with full protection
How do I add a password to a PDF for free?
Upload your PDF to Wow1, create a password, choose your security level, and download the protected version. Completely free with bank-level encryption.
What level of encryption should I use?
128-bit works with all PDF readers. For maximum security on sensitive files, use 256-bit encryption - compatible with modern readers (Adobe Reader DC, Chrome, Edge).
What encryption does Wow1 use?
Wow1 uses industry-standard AES encryption in your browser - the same technology banks use. Choose between 128-bit or 256-bit strength.
Can I remove the password later?
Yes, use our PDF Unlock tool. You'll need the original password to remove protection and create an unprotected version.
Will my protected PDF work everywhere?
Yes. Password-protected PDFs work in Adobe Reader, Preview, Chrome, Edge, and all standard PDF viewers across all devices.
Can I restrict actions without requiring a password?
Yes, set an owner password (permissions). This restricts printing, copying, or editing without prompting for a password when opening.
Do you store my password?
Never. All encryption happens locally in your browser. We never see your password or files - complete privacy.
How secure is PDF password protection?
256-bit AES encryption is virtually unbreakable with current technology. Choose a strong, unique password for maximum security.
Encryption happens in your browser. Your files and passwords never leave your device.