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Password protect and encrypt PDF files online for free using military-grade AES-256 encryption. Prevent unauthorized viewing and copying with complete privacy.
Follow this clear workflow to complete your document task with guaranteed privacy.
Select the document you need to secure with a password.
Type your chosen password and confirm it in the verification field.
Enforce industry-standard AES-256 bit encryption for maximum security.
Optionally restrict printing, content copying, and document modifications.
Click Protect PDF to apply cryptographic key hashing locally in memory.
Save your encrypted PDF file; anyone opening it will be prompted for the password.
Engineered for speed, privacy, and flawless document rendering.
Encrypts multi-megabyte files in under 2 seconds using browser WebAssembly.
Military-grade AES-256 encryption prevents brute-force unauthorized access.
Zero cloud server exposure—your password and document never leave your device.
Unlimited PDF password encryption without paying for Adobe Acrobat Pro.
No account signup, no email capture, and zero watermarks.
Secured PDFs open on all standard PDF viewers across Windows, Mac, iOS, and Android.
Everything you need to know about processing your files safely.
Remove password and restrictions from your secured PDF files with proper authorization.
Edit PDF files online for free. Add text, signatures, highlights, drawings, shapes and images directly inside your PDF.
Reduce the file size of your PDF while maintaining optimal visual clarity.
Compare Protect PDF vs Redact PDF. Learn when to compress, merge, split, OCR, or convert your PDF documents.
Compare Protect PDF vs Redact PDF. Learn when to compress, merge, split, OCR, or convert your PDF documents.
Compare Protect PDF vs Redact PDF. Learn when to compress, merge, split, OCR, or convert your PDF documents.
Process your documents instantly in your browser with bank-grade AES-256 encryption, zero server retention, and zero watermarks.
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