Apply real cryptographic encryption to your PDF — not a watermark. The output requires a password to open in any PDF reader.
Works with all PDF versions, including modern PDFs with cross-reference streams
Applies AES-128/256 standard PDF encryption using a fully spec-compliant
PDF engine that supports every PDF version — including modern PDFs with
cross-reference streams (the kind produced by Chrome, Word, and most apps today).
The output PDF will prompt for a password in every PDF reader.
All processing stays 100% in your browser — your file is never uploaded.