Encrypt PDF
Password-protect your PDF files. (Encryption is done in your browser)
PDF encryption is not yet available
We're working on adding browser-based PDF encryption. For now, please use a desktop PDF tool to password-protect your documents.
Encrypt PDF Online — Password Protect Your Documents
Password-protecting a PDF adds a layer of security, preventing unauthorized access to sensitive documents. When you encrypt a PDF, anyone who tries to open it must enter the correct password.
Encryption is particularly important for documents containing personal information, financial data, or confidential business materials. Password protection ensures that even if the file is shared or stored in an insecure location, its contents remain private.
While browser-based PDF encryption is still in development, you can use desktop tools like Adobe Acrobat, macOS Preview, or free utilities like PDFsam to password-protect your PDFs.
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FAQ
What types of PDF passwords exist?
Two types: "user password" (required to open the PDF) and "owner password" (restricts editing, printing, copying). Most people use user passwords.
Can a password-protected PDF be hacked?
Strong encryption (AES-256) makes it extremely difficult. Weak passwords can be guessed. Use long, unique passwords for sensitive documents.
Does encryption affect file size?
Encryption adds minimal overhead — typically less than 1% increase in file size.