Protect PDF without any watermark
Add password encryption to secure your PDF document. Clean output with no watermarks or branding. 100% client-side processing. Files never leave your device.
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Why Choose MendPDF?
Clean output with absolutely no watermarks or branding
Unlike competitors, MendPDF never stamps your documents
Professional-quality results for business and legal use
Frequently Asked Questions
How do I password protect a PDF?
Upload your PDF to MendPDF's protect tool, enter your desired password, and download the encrypted file. All encryption happens in your browser.
What encryption does MendPDF use?
MendPDF uses industry-standard AES encryption for PDF password protection, processed entirely client-side.
Can I protect PDFs without uploading them to a server?
Yes. MendPDF's zero-trust architecture means all encryption happens locally in your browser. No files are ever uploaded.
Zero-Trust Architecture
MendPDF uses 100% client-side WebAssembly processing. Files never leave the device. Zero-Trust architecture. No server uploads. All PDF manipulation happens locally in your browser, ensuring complete data privacy and security.