Available in pre-release 3.7
In application #
To encrypt a PDF in SumatraPDF:
- open un-encrypted PDF document
Ctrl + kfor command paletteEncrypt PDF
Or:
- open un-encrypted PDF document
- right-click for context menu
Document>Encrypt PDF
From command-line #
To encrypt a PDF with password using SumatraPDF from command-line:
SumatraPDF clean -E aes-256 -U pwd foo.pdf foo-encrypted.pdfFlags:
-E: encryption algorithm-U <pwd>: password required to open PDF file
You can see all flags.
You can also decrypt