Add password protection for restricting permissions, or entirely locking the PDF from any modifications or even require a password to view the document. Several options enable users to restrict permissions such as printing and, filling into forms, and performing modifications on password protected PDF files.
Ensure that all the PDF files you want to password protect are uploaded.
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The maximum total size of all uploaded files for adding PDF protection is 50MB.
If you need to handle huge files for protect PDF, sign up for a free account (200 MB).
All files are transferred over a secure encrypted connection (https) to maximize the security of your files.
All files are removed after adding password protection is completed, or within an hour of inactivity.