True PDF encryption with password protection cannot be reliably implemented in the browser due to JavaScript library limitations. For secure password protection, we recommend using one of these trusted services:
For developers: To implement this feature properly, you would need a server-side implementation using libraries like PyPDF2 (Python), pdf-lib (Node.js server), or PDFtk.
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Please use one of the recommended services above
Security Requirements: PDF encryption requires cryptographic operations that are difficult to implement securely in client-side JavaScript.
Library Support: While some JavaScript libraries claim to support PDF encryption, they often have compatibility issues with modern browsers or don't implement the full PDF encryption standard.
Best Practice: For sensitive documents requiring password protection, always use established, audited tools or server-side implementations.