A free online PDF password protector that adds password protection to any PDF. Set a user password (required to open) and optionally an owner password (required to edit/print). Choose whether to allow printing and content copying. All encryption happens in your browser using PDF-Lib.
Upload a PDF file by clicking or drag-and-drop.
Enter a user password (required to open the PDF).
Optionally set an owner password and toggle permissions.
Click Protect and download your password-protected PDF.
The user password is required to open and view the PDF. The owner password controls permissions (printing, copying) and can be used to remove protections. If only the user password is set, the document can still be opened without restriction in some viewers.
PDF-Lib uses standard PDF encryption (AES-128 or RC4-128). While not military-grade, it provides sufficient protection for everyday document sharing.
Free online tool — works in your browser, no sign-up required. Start using it right now.
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Every tool works in your browser — no sign-up, no data collection.