Protect PDF with Password
Encrypt your PDF with strong user password and prevent unauthorized reading or copying.
Select PDF file to encrypt
or drag and drop PDF here
Document Loaded
Set strong password for viewing and printing
Processed Successfully!
Your document is ready for download.
How to Protect PDF with Password Online in 3 Steps
Encrypt your confidential PDF documents with military-grade AES encryption to prevent unauthorized reading, copying, or printing. Reshape performs all cryptographic key generation and stream encryption directly on your device.
Select Document to Encrypt
Drop your sensitive PDF into the encryption console. The document streams into local memory ready for cryptographic protection.
Set Strong Password & Permissions
Enter a strong open/view password and optional permission restrictions to prevent unauthorized printing, editing, or copying of text and graphics.
Encrypt & Download Protected PDF
Click Protect PDF to apply standard AES encryption to all object streams. Download your password-secured document with zero server logging.
Why Use Reshape's Client-Side PDF Engine?
Submitting private documents and master passwords to cloud encryption portals exposes your credentials to server logs and potential interception. Reshape computes encryption keys locally in client-side technology.
100% Local Confidentiality
Zero password exposure. Your chosen password and cryptographic encryption keys never travel across the internet or touch any server.
High-Performance Document Engine
Industry-standard AES encryption ensures certified compatibility with Adobe Acrobat, macOS Preview, and mobile PDF readers.
Zero Server Storage & GDPR
Ideal for legal discovery documents, medical records, financial tax packets, and proprietary business contracts.
Key Technical Specifications
Our encryption engine adheres to the cryptographic security standards defined in ISO 32000-1.
Implements standard PDF /Standard security handlers, /Crypt filter dictionaries, and PBKDF2 key derivation.
Encrypts large multi-megabyte files, contracts, and archives swiftly in local browser memory.
Utilizes native browser industry-standard web cryptography APIs (AES-256) for high-speed encryption.
Zero telemetry, zero password storage, and complete memory sanitization upon file download.
Frequently Asked Questions
Learn about PDF password protection, AES encryption standards, and permission management.
How is my PDF protected and encrypted? expand_more
Reshape implements standard Advanced Encryption Standard (AES-128 and AES-256) encryption matching official ISO 32000 specifications for robust, industry-standard security.
Does Reshape know or store my password? expand_more
No. All password hashing and encryption key computations occur entirely inside your browser using the native Web Cryptography API. Reshape has zero access to your password or documents.
What is the difference between a user password and an owner password? expand_more
A user (or open) password is required to view and read the document. An owner (or permission) password restricts editing, printing, and copying while allowing unauthorized users to read the document.
Can encrypted files be opened in standard PDF readers like Adobe Acrobat? expand_more
Yes. Because our engine complies strictly with official ISO encryption standards, your protected file prompts for the password cleanly in Adobe Acrobat, Chrome, Safari, and all standard PDF readers.
What happens if I forget the password I set? expand_more
Because the encryption uses standard AES-256 encryption and Reshape does not store your password, lost passwords cannot be recovered. Always keep a secure backup of your credentials.