The PDF Encryption tool adds open and owner passwords to a single PDF file entirely in your browser, making it useful for protecting contracts, invoices, reports, and shared documents before delivery.
Key Features
- Upload one PDF file and encrypt it locally.
- Set a user password to control file opening access.
- Set an owner password, or leave it empty to reuse the user password.
- Export a new PDF encrypted with AES-256 by default.
- Download the encrypted result without uploading the source file or passwords.
Steps
- Choose or drag one PDF file into the tool area.
- Enter the user password and optionally add an owner password.
- Start encryption and wait for the browser to finish processing locally.
- Switch to the result area and download the new encrypted PDF file.
Password Notes
- User password: required when someone opens the PDF.
- Owner password: used for document management and permission control.
- If the owner password is left empty, the tool automatically reuses the user password.
Use Cases
- Protect contracts, quotations, and bid files before sending.
- Encrypt invoices, reimbursement files, and finance documents before download.
- Secure reports, proposals, and customer documents before sharing externally.
- Add an access barrier for archived or cross-team document delivery.
Privacy
This tool reads the file, performs encryption, and exports the result locally in your browser without uploading PDF content or passwords to the server.