How to Password Protect and Encrypt a PDF with AES-256
Sending unencrypted financial statements or proprietary agreements over email is a major data security risk. Encrypting PDFs with AES-256 ensures only authorized recipients with the password can open them.
Standard AES-256 Encryption
Standard PDF encryption applies 256-bit Advanced Encryption Standard (AES) cipher algorithms to all document streams and cross-reference entries.
Using modern Web Crypto API primitives, encryption happens directly inside your browser RAM. Your chosen password is never transmitted across the network.
Always save your encryption password in a secure password manager. Because PDFSimplify does not store passwords or document copies, lost passwords cannot be recovered.
Configurable User Permissions
In addition to an open password, you can restrict permissions: disallowing printing, preventing text copying, and prohibiting annotations without an owner credential.
Summary
Client-side encryption ensures enterprise-grade security without trusting third-party cloud servers with your passwords.