🔒 PDF Protect Pro
Lock PDFs with RC4 128-bit encryption • User & owner passwords • Permission controls • 100% client-side • No upload
RC4 128-bit
User Password
Owner Password
PDF Standard
✅ REAL PDF ENCRYPTION: This tool uses @pdfsmaller/pdf-encrypt-lite with RC4 128-bit encryption.
Your PDF will prompt for a password in Adobe Acrobat, Chrome, Edge, and all PDF readers.
100% private. No server uploads.
Drag & Drop PDF File
or click to browse from computer
RC4 128-bit Encryption Ready
✓ Files never leave your device • ✓ Real PDF password protection • ✓ Free forever
PDF Encrypted Successfully!
Frequently Asked Questions
🔒 Does this actually encrypt my PDF?
YES. This uses RC4 128-bit encryption, the same standard supported by Adobe Acrobat, Chrome, and all PDF readers. Your PDF will prompt for a password when opened.
📂 Is my file uploaded to a server?
NO. 100% client-side. Your PDF never leaves your device. All encryption happens locally in your browser.
🔐 What's the difference between passwords?
User password is required to open the PDF. Owner password is required to change security settings. If only user password is set, that password also grants owner permissions.
💰 Is this really free?
Completely free forever. No watermarks, no registration, no hidden costs.