PDF Password Adder

Adding password protection to PDF files is essential for protecting confidential information during sharing and distribution. Financial statements, legal contracts, medical records, personal identification documents, and proprietary business reports all benefit from password protection before being emailed or uploaded to shared storage. PDF encryption uses AES-128 or AES-256 encryption algorithms — when you set a user password, the entire document content is encrypted and unreadable without the correct password. The AllTools PDF Password Adder sets both user passwords (required to open the document) and owner passwords (restricting print, copy, and edit permissions) using pdf-lib.js, processing everything in your browser. No version of your document — protected or unprotected — is transmitted to any server. This is critical for documents containing the sensitive information that most needs protecting. Share the protected PDF through any channel, then communicate the password through a separate channel (text message, phone call) for security.

Beyond the open password, PDF documents support granular permission settings that control what recipients can do with the document. Print permission controls whether the document can be printed at all, and at what quality (low resolution or full resolution). Copy permission controls whether text can be selected and copied to the clipboard — restricting this prevents easy extraction of content. Modify permission controls whether the document can be edited, pages reordered, or annotations added. Form fill permission controls whether interactive form fields can be completed. Screen reader permission controls accessibility tools' ability to read the document aloud. Annotation permission controls whether comments and markup can be added. For most business documents shared externally, a practical permission set is: allow printing (full resolution), disallow copying, disallow modification, allow form filling. This lets recipients print and use the document while preventing unauthorized reproduction of the content. Always communicate permissions and passwords through secure, separate channels from the document itself.