What encryption standard is applied?

100% Client-Side & Private

Security Encryption

Protect PDF Online with Password

Encrypt your sensitive PDF documents with secure password protection to prevent unauthorized opening and viewing.

Client-side document encryption • Up to 80 MB

Choose File

No PDF file selected for preview

Upload a document above to inspect pages and thumbnails

Follow these simple steps to process your document with maximum privacy and speed:

Upload the PDF document you want to secure.

Enter and confirm a strong password.

Choose permissions (optional: disable printing or copying).

Click 'Protect PDF' and download your encrypted document.

Your file is never uploaded to remote servers. The algorithm runs locally in your browser memory via WebAssembly.

Skip long server queues and network bottlenecks. Documents are rendered and transformed at client-side hardware speeds.

Works seamlessly on Google Chrome, Apple Safari, Firefox, and Microsoft Edge across Windows, macOS, Linux, and iOS.

Got Questions?

Everything you need to know about this tool, security, and usage.

Standard PDF encryption is applied to lock the document stream so standard PDF viewers will require the password before viewing content.