What encryption is used?

AES-256 (PDF 2.0 standard) via pypdf — not the weaker RC4 that older tools use.

No. Files are processed in memory and deleted when the response is sent.

User vs owner password?

User password is required to open the file. Owner password lifts all restrictions.

Add a password and permission flags (print/copy) to any PDF.

Drop a file

.pdf · up to 100 MB

User password (required to open)

Owner password (optional — defaults to user password)

Allow printingEnable

Allow text copyEnable

1
Drop your PDF
Any unlocked PDF.
2
Set passwords and permissions
User password is required to open. Owner password controls permissions.
3
Download protected PDF
Readers will prompt for the user password on open.

What encryption is used?: AES-256 (PDF 2.0 standard) via pypdf — not the weaker RC4 that older tools use.
Is my PDF kept?: No. Files are processed in memory and deleted when the response is sent.
User vs owner password?: User password is required to open the file. Owner password lifts all restrictions.